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  • High Competition
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Articles published on Level Of Competitiveness

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  • New
  • Research Article
  • 10.1016/j.jbiomech.2026.113300
Synergistic patterns during steady-state wheelchair propulsion in male wheelchair rugby players with cervical spinal cord injury: influence of functional classification and competitive level.
  • Jun 1, 2026
  • Journal of biomechanics
  • Mikito Hikosaka + 2 more

Synergistic patterns during steady-state wheelchair propulsion in male wheelchair rugby players with cervical spinal cord injury: influence of functional classification and competitive level.

  • New
  • Research Article
  • 10.1016/j.ynexs.2026.100121
Desert power for the AI era
  • Jun 1, 2026
  • Nexus
  • Ziheng Zhu + 3 more

The surge in generative artificial intelligence (AI) may cause growing conflicts between securing electricity supplies and achieving sustainable development goals. Here, we propose off-grid hybrid wind-solar-storage (WSS) systems, which leverage the immense renewable resources in desert areas alongside relatively low-cost fiberoptic connectivity of data centers, to address this challenge. Using a global high-resolution techno-economic optimization model, we demonstrate that well-planned WSS systems can deliver cost-effective 24/7 uninterrupted power, primarily tailored for energy-intensive, latency-tolerant foundation model training. Furthermore, our analysis reveals that regions proximate to load centers can also support latency-sensitive inference tasks. This energy supply is capable of delivering 1 PWh globally in 2030 at levelized costs of around $39/MWh, meeting the forecasted electricity demand for AI by the International Energy Agency. Moreover, even if AI electricity demand increases 10-fold, reaching 10 PWh by 2030, the unit cost increment would be less than 20%. Further uncertainty analysis shows that under extreme investment (3.0×) and cooling (2.0×) cost assumptions for data centers operating with the desert WSS systems, this 10-PWh/yr demand could still be satisfied at competitive cost levels. The desert WSS systems could potentially align computational and clean energy infrastructure in the AI era, as well as simultaneously achieving decarbonization and ecological restoration. Broader context: The rapid expansion of artificial intelligence (AI) poses emerging challenges to electricity supply and climate goals. Addressing this critical energy-computing nexus, we investigate a potential solution: co-locating data centers with off-grid wind-solar-storage systems in desert regions. By utilizing efficient fiberoptic data transmission to circumvent the challenges of long-distance power transport, this approach offers a possible pathway to convert renewable resources into computational power. Our analysis suggests that this strategy could help meet growing AI energy demands in an economically viable and environmentally sustainable manner.

  • New
  • Research Article
  • 10.1016/j.knee.2026.104407
Rerupture rate after ACL reconstruction in adolescent female soccer players: a case series.
  • Jun 1, 2026
  • The Knee
  • Pedro Álvarez Díaz + 9 more

Rerupture rate after ACL reconstruction in adolescent female soccer players: a case series.

  • New
  • Research Article
  • 10.1097/phm.0000000000003047
Sequential Extracorporeal Shockwave Therapy and Platelet-Rich Plasma for Treatment of Sacral Stress Fracture in a Triathlete: A Case Report.
  • May 19, 2026
  • American journal of physical medicine & rehabilitation
  • Kathleen Lefiles + 3 more

Sacral stress fractures are rare in athletes, present as nonspecific gluteal and/or back pain, and are often missed on radiographs. Standard treatment includes activity modification, physical therapy, and pain medications. However, prolonged recovery and recurrence remain concerns in athletes. There is evidence for the use of extracorporeal shockwave therapy (ESWT) in the treatment of stress fractures, and platelet-rich plasma (PRP) has also shown promise in accelerating bony healing. This case report describes a 48-year-old male triathlete with a recurrent sacral stress fracture unresponsive to conservative management. Following MRI diagnosis, he underwent sequential ESWT and PRP injection, resulting in successful return to competitive training levels at 8-weeks post-treatment. Although an MRI at 3-months post-treatment showed persistent bony edema, his PROMIS-Pain Interference (PI) and Global Pain Scale (GPS) scores improved from 54 to 40 and 62/100 to 4/100, respectively. There is currently no published literature on the sequential use of ESWT and PRP for the treatment of sacral stress fractures. To our knowledge, this is the first documented case of this novel treatment, suggesting a potential role for combination therapy in such injuries. Further research is warranted to validate the efficacy and long-term outcomes of this emerging therapeutic approach in athletic populations.

  • New
  • Research Article
  • 10.1055/a-2858-1150
Reliability, Responsiveness, and Construct Validity of the V-cut Test in Football Players.
  • May 15, 2026
  • International journal of sports medicine
  • Oliver Gonzalo-Skok

The present study aimed to assess the reliability, responsiveness, and age-related and competitive level differences of a 25-m change of direction maneuver (V-cut test) in football players. Two-hundred and eighty-nine male football players performed the V-cut test. Thirty-four players underwent the test on two occasions, separated by 5-7 days, to assess test-retest reliability. Eighty-six young players performed the V-cut test three times, separated by 12 weeks, to analyze responsiveness. Finally, 89 young players of different ages (U-15 to U-20) and 80 adult players of different competitive levels performed the V-cut test several times throughout the season to examine between-group differences. Reliability analysis showed a high intraclass correlation coefficient of 0.94 and a low coefficient of variation of 0.8%. The responsiveness was dependent on maturity status, showing a positive response in pre-peak height velocity (short-term p<0.05) or post-peak height velocity (short- and long-term p<0.05) players, although the peak height velocity group did not exceed the minimal detectable change. Age-related (effect size [ES]: 0.93-5.68) and competitive-level difference (ES: 0.57-1.96) analyses reported better V-cut test performance as age and competitive-level increased in football players. The V-cut test is reliable for assessing change of direction ability and can be used to monitor change of direction ability depending on maturity, allowing it to differentiate between players of different ages and levels.

  • New
  • Research Article
  • 10.1177/19417381261442594
Lipid Profiles in Elite and Collegiate Athletes: A Scoping Review.
  • May 13, 2026
  • Sports health
  • Lexy Farrington + 5 more

The effects of regular physical activity and its influence on lipid metabolism is well established. However, the extent to which elite and collegiate athletes exhibit distinct lipid profiles remains an area of ongoing research. To map the literature on lipid profiles in collegiate and elite athletes, summarize variations by sex, sport, and competitive level, and identify gaps to guide future research. A comprehensive search of PubMed, Cochrane, and SPORTDiscus identified English-language studies on lipid profiles in professional and collegiate athletes, published between January 2010 and January 2025. Studies were screened and selected in Rayyan. Scoping review. Level 4, scoping review of Level 1-3 studies. Lipid values along with factors associated with variation across athlete populations were extracted. A total of 31 studies met inclusion criteria, representing 5921 athletes (3271 men, 2650 women; mean age, 24.3 years). Most cohorts were male (84%) and elite-level (77%), whereas women were not represented in many of the sports. High-density lipoprotein (HDL), low-density lipoprotein (LDL), and total cholesterol (TC) were reported most consistently. Mean lipid values included HDL 59.3 ± 14.0 mg/dl, LDL 94.3 ± 20.4 mg/dl, TC 168.0 ± 19.8 mg/dl, triglycerides (TG) 86.8 ± 28.4 mg/dl, and VLDL 38.2 ± 29.5 mg/dl. Female athletes showed higher HDL and lower LDL and TG than male athletes. Elite athletes reported higher HDL, TC, and TG, and minimal differences in LDL, compared with collegiate athletes. Lipid levels varied by sport and sex. Female runners reported the highest (73.5 mg/dl) and female soccer players the lowest (37.7 mg/dl) HDL, and judo athletes showed the highest LDL (139.4 mg/dl) and TG (143.6 mg/dl). Lipid profiles among elite and collegiate athletes vary considerably by sex, sport, and competition level. Standardized, sex-balanced studies are needed to clarify the role of lipid metabolism in athlete health, cardiovascular risk, and performance. Further research is needed using rigorous, standardized, and sex-balanced methodologies to clarify the impact of lipid profiles on athlete health and performance, and to guide evidence-based strategies for cardiovascular risk assessment and management in athletic populations.

  • New
  • Research Article
  • 10.1186/s40359-026-04628-w
Psychological well-being, body image and self-esteem in elite and amateur female taekwondo athletes in Türkiye.
  • May 13, 2026
  • BMC psychology
  • Mevlüt Gönen + 4 more

Female athletes competing in weight-category sports may experience unique psychological pressures related to body image, performance expectations, and sociocultural gender norms. While elite sport participation is often assumed to enhance psychological functioning, evidence remains mixed. This study examined differences in psychological well-being, body image, self-esteem, and athletic identity between elite and amateur female taekwondo athletes in Türkiye, a cultural context characterised by distinct gender and body norms, and explored their associations with psychological well-being. Türkiye represents a theoretically relevant context in which institutional weight regulation intersects with sociocultural gender norms, creating a setting in which body-related psychological experiences may be uniquely shaped by both sport structures and cultural expectations. A cross-sectional design was employed with 233 female taekwondo athletes (107 elite, 126 amateur; M_age = 22.0 ± 3.2 years). Participants completed validated Turkish versions of the Warwick-Edinburgh Mental Well-Being Scale (WEMWBS), the Body Appreciation Scale-2 (BAS-2), the Rosenberg Self-Esteem Scale (RSES), and the Athletic Identity Measurement Scale (AIMS). Independent samples t-tests, one-way analysis of variance (ANOVA), Pearson correlations, and hierarchical multiple regression analyses were conducted. No significant differences were found between elite and amateur athletes in psychological well-being or self-esteem. Elite athletes demonstrated significantly stronger athletic identity (p < .001), whereas amateur athletes reported significantly, though modestly, higher body image scores (p = .046). In regression analyses, self-esteem (β = 0.428, p < .001) and body image (β = 0.354, p < .001) were significant predictors of psychological well-being, jointly explaining 52.6% of the variance (R² = 0.526), with self-esteem showing the strongest independent association. Effect size estimates indicated that differences were large for athletic identity (d = 0.75), small for body image (d = 0.26), and negligible for psychological well-being and self-esteem (d = 0.09 and d = 0.13, respectively). Psychological well-being in female taekwondo athletes was more strongly associated with self-esteem and body image than with competitive level. These findings support prioritising self-esteem and body appreciation in structured psychological support programs for female athletes in weight-category sport systems.

  • New
  • Research Article
  • 10.1108/cg-01-2025-0005
Corporate governance and firm value: product market competition as a moderator in a developing market
  • May 12, 2026
  • Corporate Governance: The International Journal of Business in Society
  • Ismail Khan + 4 more

Purpose This study aims to examine the moderating role of product market competition (PMC) in the relationship between corporate governance (CG) and firm value from the perspective of agency theory in Pakistan. Design/methodology/approach This study applied a fixed-effect model, instrumental variable two-stage least squares estimator and the system generalized method of moments to analyze panel data, collected from 369 firms listed on the Pakistan Stock Exchange between 2010 and 2023. Findings The findings indicate that CG increases firm value only in highly competitive industries through a complementary effect, whereas it diminishes firm value in less competitive industries through a substitutive effect. The results further demonstrate that this impact is more pronounced in state-owned enterprises (SOEs) than in non-SOEs. The robustness of the findings is confirmed through consistent results across alternative sample divisions, variable measurements, governance structures and regression estimations. Research limitations/implications Policymakers and regulatory authorities in developing countries like Pakistan should consider diversifying CG structures based on varying levels of competition to improve firm value. Given the strong complementarity between PMC and CG in SOEs, regulatory reforms should prioritize aligning governance practices in SOEs with the best practices observed in non-SOEs to maximize performance outcomes. Originality/value This study grasps critical research gaps in the literature, theory and methodology by investigating how external governance (i.e. PMC) shapes the relationship between internal CG and firm value through the lens of agency theory. Besides, it offers insights into how the CG structures of SOEs and non-SOEs respond to competitive pressures within the unique institutional context of Pakistan. Moreover, the findings support the view that the moderating role of PMC in the nexus of CG with firm value or performance diverges from patterns observed in other institutional settings.

  • New
  • Research Article
  • 10.1186/s12934-026-03020-y
Efficient vitamin A production in Lipomyces starkeyi through metabolic engineering of the β-carotene and retinoid pathways.
  • May 12, 2026
  • Microbial cell factories
  • Akari Kinoshita + 6 more

Vitamin A, an essential micronutrient, is critical for vision, immune function, and cellular differentiation. Traditional vitamin A production methods, primarily based on chemical synthesis, pose significant environmental challenges. Microbial fermentation offers a sustainable alternative, but microbial production of vitamin A has yet to match chemical synthesis in terms of yield and cost-effectiveness. Oleaginous yeasts, such as Lipomyces starkeyi, which can synthesize high levels of acetyl-CoA and lipids, represent promising platforms for producing high-value lipophilic compounds, such as vitamin A. L. starkeyi was engineered for the first time to produce vitamin A by introducing key enzymes in the β-carotene and retinoid biosynthetic pathways. This approach included integrating genes encoding lycopene cyclase/phytoene synthase (McCarRP), phytoene desaturase (McCarB), and β-carotene 15,15'-dioxygenase (MbBlh). Further optimization of the mevalonate pathway enabled the production of over 600 mg/L vitamin A in a 3-L fed-batch fermentation. Fe2⁺ supplementation improved yield, while a two-phase culture system using dodecane and butylated hydroxytoluene enhanced vitamin A recovery, with over 90% recovered in the extracellular phase. This study establishes L. starkeyi as a promising host for sustainable vitamin A production. Although significant improvements in yield were achieved, further optimization of pathway regulation and fermentation conditions is needed to reach economically competitive levels. These findings provide a foundation for developing L. starkeyi as a platform for large-scale production of vitamin A and other valuable terpenoids.

  • New
  • Research Article
  • 10.1111/jsr.70349
Sleep Health of Athletes of Different Sports: Translation and Validation of the Athlete Sleep Screening Questionnaire to Portuguese.
  • May 11, 2026
  • Journal of sleep research
  • João Barreira + 4 more

This study aimed to translate and validate the Athlete Sleep Screening Questionnaire (ASSQ) into Portuguese and assess the sleep health of athletes using the ASSQ. Translation followed established scientific guidelines. A sample of 246 Portuguese athletes from various sports completed the ASSQ, the Pittsburgh Sleep Quality Index (PSQI) and the Reduced Morningness-Eveningness Questionnaire (r-MEQ). Exploratory and confirmatory factor analysis supported two factors for the Sleep Difficulty Score (SDS) and chronotype subscales. Model fit indices indicated excellent fit for SDS and chronotype. Internal consistency was acceptable for SDS (α = 0.58) and chronotype (α = 0.54). Mean SDS was 5.7, and 22% of the sample were found to have sleep problems. Specifically, 16% were classified with moderate sleep problems and 6% with severe sleep problems. No significant differences in SDS categories were found across sex, sports type, sports environment, competitive level or age group. Travel-related sleep disturbances were reported by 20% of athletes, and 11% experienced performance issues after travelling. Chronotype differed by sports type, sports environment, competitive level and age group, but not by SDS categories. Additionally, morning chronotypes reported more travel-related sleep disturbances (p = 0.045). The Portuguese ASSQ showed strong validity and acceptable reliability. Cohort analysis revealed that a substantial proportion of Portuguese athletes reported having sleep problems and some would benefit from specific interventions intended to improve sleep.

  • New
  • Research Article
  • 10.1002/arj.70217
Editorial Commentary: Return to Sport Is Not the Finish Line: Raising the Bar for Long-Term Outcomes After Hip Arthroscopy in Athletes.
  • May 11, 2026
  • Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association
  • Jay Moran + 1 more

Editorial Commentary: Return to Sport Is Not the Finish Line: Raising the Bar for Long-Term Outcomes After Hip Arthroscopy in Athletes.

  • Research Article
  • 10.1177/03635465261442967
Surgical Management of SLAP Lesions in Baseball Throwers: Posterosuperior and Posterior Labral Debridement With or Without Anterosuperior Repair Yields High Return to Play Rates.
  • May 7, 2026
  • The American journal of sports medicine
  • Yota Kin + 9 more

Reported rates of return to the preinjury level of play (RTPL) after superior labrum anterior and posterior (SLAP) repair in overhead athletes are relatively low (22%-64%). Current fixation techniques that rigidly fix the posterosuperior labrum may lead to overconstraint and persistent pain. The purpose of this study was to retrospectively evaluate the clinical outcomes and RTPL rates of our surgical strategy in competitive baseball throwers with SLAP lesions. This strategy includes debridement of the posterosuperior labrum without fixation, with selective anterosuperior fixation when anterior extension and instability of the labral detachment are present. The authors hypothesized that posterosuperior and posterior debridement with or without anterosuperior repair would yield high return to play rates in baseball throwers with SLAP lesions. Case series; Level of evidence, 4. A total of 80 shoulders in 80 baseball players (mean age, 20 years [range, 15-38 years]) underwent arthroscopic surgery for SLAP lesions (Type II or Type VIII with posterior extension). The cohort included 16 professional, 31 collegiate, 23 high school, and 10 recreational players. Based on intraoperative findings, isolated debridement of the posterosuperior and/or posterior labrum was performed for stable lesions, defined as posterosuperior detachment without gross instability or lift-off of the superior labrum (n = 33), while anterosuperior repair, defined as suture anchor fixation of the unstable anterior labrum, was added only if the detachment extended anteriorly and demonstrated instability of the labrum in this region (n = 47). The primary outcome was the RTPL rate, defined as return to the preinjury level of play. Secondary outcomes included the time to RTPL and subgroup comparisons according to procedure, player position, and competition level. Of the 80 players, 79 (99%) returned to competitive baseball play; 1 player failed to return secondary to persistent shoulder pain. Overall RTPL was 79% (63/80). The RTPL rate was 73% (24/33) in the debridement-alone group and 83% (39/47) in the anterosuperior repair group (P = .27). Pitchers achieved an RTPL rate of 81% (38/47), and professional players achieved an RTPL rate of 75% (12/16). The mean time to RTPL was 9 months overall. There were no significant differences in RTPL rates or time to return between procedure types, player position, or competition level. This surgical strategy involving debridement of the posterosuperior labrum yielded high RTPL rates regardless of whether anterosuperior repair was performed. Avoiding rigid fixation of the posterosuperior labrum may be a key to successful outcomes in competitive throwing athletes.

  • Research Article
  • 10.1136/bjsports-2025-110894
Supported implementation enhances injury prevention programme (Prep-to-Play) use in women and girls playing Australian Football: a pragmatic type III hybrid implementation-effectiveness stepped wedge cluster randomised trial.
  • May 6, 2026
  • British journal of sports medicine
  • Brooke E Patterson + 26 more

Evaluate the effect of supported implementation on a co-created injury prevention programme (Prep-to-Play) use and injury incidence and evaluate the dose response relationship between adherence and injury incidence. In this hybrid implementation-effectiveness stepped wedge cluster randomised trial, 165 women's/girls' Australian Football teams (2481 players) were randomly allocated to transition from unsupported to supported implementation at one of five time points during 2021/2022. Supported implementation included in-person workshops and support visits for coaches/team leaders. Unsupported implementation was access to online resources. Prep-to-Play includes warm-up, contact and strength activities. Primary (Prep-to-Play use) and secondary (concussion, anterior cruciate ligament (ACL)) outcomes were reported weekly. Weekly Prep-to-Play use (yes/no) was defined as using ≥75% of programme elements, ≥two-thirds of sessions each week. Analyses compared outcomes between supported and unsupported phases, adjusted for clustering, period, age group, competition level and region. Average weekly Prep-to-Play use by teams was 13.1% (95% CI 11.5% to 14.9%) in the unsupported and 29.7% (95% CI 27.6% to 31.9%) in supported phase (OR 3.7 95% CI 2.4 to 5.7). The concussion and ACL injury incidence (per 1000 game hours) was 6.80 (95% CI 5.75 to 8.05) and 1.36 (95% CI 0.98 to 1.89) in unsupported, and 3.50 (95% CI 2.72 to 4.52) and 0.69 (95% CI 0.44 to 1.15) in supported, respectively, but the effect of supported implementation on injury incidence was unclear (concussion: incidence rate ratios (IRR) 1.36; 95% CI 0.74 to 2.49; ACL: IRR 2.27 (0.56 to 9.12). Higher Prep-to-Play adherence was associated with fewer total injuries (IRR: 0.95 95% CI 0.92 to 0.99). Supported implementation via in-person workshops and support visits was associated with greater Prep-to-Play use compared with unsupported implementation, and greater adherence was associated with fewer injuries. NCT04856241.

  • Research Article
  • 10.3389/fphys.2026.1837615
Effects of plyometric training on strength, explosive performance, and agility in female team-sport athletes: a systematic review and three-level meta-analysis
  • May 5, 2026
  • Frontiers in Physiology
  • Zhuo Zeng + 9 more

Introduction Plyometric training (PT) is widely used in team sports, but its outcome-specific effects in female team sport athletes and the influence of key programming variables remain unclear. Methods This systematic review and three-level meta-analysis examined the effects of PT on strength, jumping, sprinting, throwing, and agility in female team sport athletes and explored whether training frequency, intervention duration, and ground contacts per session moderated these effects. Randomized and non-randomized controlled trials were identified through database searches and manual screening. A three-level random-effects meta-analysis with cluster-robust variance estimation was performed. Subgroup analyses and meta-regressions examined potential moderators, and certainty of evidence was assessed using GRADE. Thirty-six studies involving 921 participants were included. Results PT significantly improved vertical jump (SMD = 0.67), horizontal jump (SMD = 0.70), sprint (SMD = -0.85), throwing (SMD = 0.91), and agility (SMD = -1.09). Effects on strength were inconsistent ( p = 0.0025), with improvements in upper-body (SMD = 1.09) but not lower-body strength (SMD = 0.08). Competitive level moderated agility outcomes, whereas age was not a consistent moderator. Meta-regression showed no clear associations of training frequency, intervention duration, or ground contacts per session with performance changes. Certainty of evidence ranged from very low to moderate. Discussion/conclusion PT can be an effective training strategy for improving multiple outcomes in female team sport athletes, particularly jumping, sprinting, throwing, and agility. However, adaptations appear outcome-specific, and evidence is insufficient to identify programming variables that consistently influence outcomes. Further studies with larger and more diverse samples are needed. Systematic Review Registration https://www.crd.york.ac.uk/PROSPERO/view/CRD420261328856 , identifier CRD420261328856.

  • Research Article
  • 10.2519/josptcases.2026.0167
From Upper Extremity Pain and Digital Ischemia to Hypothenar Hammer Syndrome in a Matter of Days: A Case Report of a Semi-Professional Volleyball Player
  • May 4, 2026
  • JOSPT Cases
  • Nico Magni + 2 more

BACKGROUND: Ulnar artery thrombosis in the hand is a rare presentation. This condition is also called hypothenar hammer syndrome, and it can be caused by local hand trauma or insults to proximal shoulder arteries leading to thromboembolism. CASE PRESENTATION: A 19 years-old male left-handed semi-professional volleyball player was referred by a physiotherapy clinic for a second opinion. The athlete developed left sided shoulder, arm, forearm, and hand pain during an intense spiking session, which led him to discontinue training. During the session, he also developed blanching of the left middle fingertip, which resolved within minutes. Within two weeks after initial symptoms onset, finger blanching developed into persistent discoloration with reduction in hand temperature compared to the unaffected side. An emergency ultrasound imaging revealed thrombosis of the ulnar artery at the hand and the patient was hospitalized. OUTCOME AND FOLLOW-UP: The athlete was referred to the emergency department where physicians excluded proximal arterial insults responsible for the hand ischemia. A diagnosis of hypothenar hammer syndrome was made, and he was prescribed with antithrombotic therapy. The patient remained in the hospital for one week to exclude cardiovascular and systemic pathologies responsible for the thrombosis. The patient returned to high levels of competition within six months from injury. DISCUSSION: The case described presented with hypothenar hammer syndrome associated with local trauma to the hand. The presence of proximal shoulder and arm symptoms was incidental and unrelated to the hand ischemia. Overall, the patient experience had been stressful due to the uncertainty regarding return to sport during the initial treatment phase.

  • Research Article
  • 10.1111/joac.70090
Disentangling Inequality and Exploitation in the Rice Value Chain in Northern Uganda
  • May 3, 2026
  • Journal of Agrarian Change
  • Malin J Nystrand

ABSTRACT Although inequality between actors in agricultural value chains has been extensively studied, informal and semiformal arrangements in domestic value chains involving small‐scale actors have been explored less than formal arrangements involving large firms. This study contributes to this literature, firstly, by suggesting a novel analytical framework for analysing inequality and exploitation and the agency of actors within an unequal value‐chain relationship; and secondly, by applying it to the relationship between rice millers and rice farmers in Gulu in northern Uganda, i.e., to one node in a larger rice value chain. This study explores this relationship in a situation of high levels of competition between millers, potentially strengthening farmers' bargaining power. The form and degree of inequality and exploitation in the relationship are analytically disentangled by applying the analytical framework, combining Graeber's conceptualization of exchange and hierarchy with Snyder's definitions of exploitation. The study shows that, although the relationship is still characterized by inequality and has exploitative features, farmers can and do exit from the relationship.

  • Research Article
  • 10.26858/cpjok.v18i1.663
Concerns about the Self-Confidence of Road Race Athletes at IMI Garut Regency
  • May 1, 2026
  • COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga
  • Shofa Oktavian + 3 more

Road racing is a high-risk motorsport discipline that demands not only technical skill and physical readiness but also strong psychological regulation. Competitive anxiety and self-confidence are often associated with athlete performance; however, empirical studies on their relationship in the context of high-speed motorsport are still limited. This study aims to analyze the relationship between self-confidence and anxiety in road race athletes under the auspices of the Indonesian Motorsport Association (IMI) of Garut Regency. The study used a quantitative correlational design with a total sampling technique involving 10 athletes from various competition levels (professional, semi-professional, and beginners). Data were collected through a validated questionnaire and then analyzed using prerequisite tests (Shapiro–Wilk normality and Levene homogeneity) and the Pearson product–moment correlation test. The results showed that both variables were normally distributed and homogeneous (p &gt; 0.05). The correlation analysis yielded a coefficient of r = 0.054 with a significance value of p = 0.947 (&gt; 0.05), indicating no significant relationship between self-confidence and anxiety. These findings suggest that in the context of high-risk motorsport, anxiety does not always reduce athlete confidence. Psychological responses are likely influenced by competitive experience and situational interpretations of racing pressure. These research findings highlight the complex dynamics of emotion regulation in road racing and provide implications for the development of more contextual psychological interventions.

  • Research Article
  • 10.1016/j.cognition.2025.106409
Low socioeconomic status amplifies the perceived rarity of large rewards.
  • May 1, 2026
  • Cognition
  • Simon Ciranka + 2 more

Decision-making relies on heuristics derived from past experiences that likely vary with socioeconomic status. We investigate socioeconomic differences in people's reliance on a risk-reward heuristic, which exploits the tendency for larger rewards to be less probable in the world. In simulations, we show that a stronger relationship between rewards and their occurrence probability is expected under conditions of scarcity and high competition when foraging for resources. We then developed lottery and vignette tasks in which participants estimated the probability of rewards of different magnitudes. We found, and replicated, that participants with lower socioeconomic status (n=144) rate larger rewards as less probable, but smaller rewards as more probable, than participants with higher socioeconomic status (n=154). The same interaction was observed when comparing success probabilities of competitive foragers in environments where resources are scarce versus abundant. Telling participants about different levels of scarcity and competition in the vignettes altered their probability estimates in a manner consistent with the foraging model. We suggest that the heuristics used by people with lower socioeconomic status are a concrete adaptation to experiences of scarcity. This means psychological socioeconomic differences will persist unless actions directly tackle scarcity.

  • Research Article
  • 10.26858/cpjok.v18i1.666
Agility And Speed Of Football Teams Using Arrowhead Tests And 40-Meter Sprints
  • May 1, 2026
  • COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga
  • Khumaira Marsyahidah Badu + 3 more

Modern football demands optimal agility and speed as key components of a player's physical performance. Standardized test-based evaluation is necessary to obtain an objective picture of an athlete's physical condition profile. This study aims to describe the agility and speed profiles of football players using the Arrowhead Agility Test and the 40-meter sprint. The study used a descriptive quantitative design with a total sampling approach involving 22 UNY Academy athletes. Data collection was conducted through two on-field physical performance tests. Each participant performed two attempts at each test, and the best time was used as the final score for the analysis. The analysis results showed that the mean time on the Arrowhead Agility Test was 8.90 seconds with a standard deviation of 0.57 seconds. Meanwhile, the mean time for the 40-meter sprint was 5.71 seconds with a standard deviation of 0.39 seconds. Based on performance assessment criteria, both components fall into the moderate category for the college or amateur competitive level. These findings indicate that although the players' physical condition is adequate and relatively homogeneous, there is still room for development, particularly in change of direction speed and sprint acceleration. This research provides a practical contribution for coaches in developing training programs that are more structured, specific, and based on actual player performance data.

  • Research Article
  • 10.26858/cpjok.v18i1.545
Analysis SWOT of The Surabaya City Women’s Basketball Final Match at the 9th East Java Province 2025 Based on Statistical Data FIBA Live Stats Application
  • May 1, 2026
  • COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga
  • Nathasa Eka Yessnia + 1 more

This study aims to quantitatively analyze the performance of the Surabaya City women’s basketball team during the final match of the 2025 East Java Provincial Sports Week (PORPROV IX) and to formulate a SWOT-based strategic framework grounded in objective match statistics. A quantitative descriptive research design was employed, utilizing secondary data recorded in real time through the official FIBA LiveStats platform. The data comprised key technical performance indicators, including shooting efficiency, rebounds, assists, turnovers, steals, and blocks. The findings reveal that the Surabaya City team demonstrated notable strengths in free-throw efficiency (81.2%) and defensive performance, as indicated by a high number of steals (19) and blocks (6). These strengths were further reinforced by opportunities arising from the opponent’s elevated turnover rate (28), suggesting potential advantages in transition play and defensive pressure. However, the analysis also identified critical weaknesses, particularly low field goal efficiency (26%) and limited offensive rebounding performance (16 rebounds compared to the opponent’s 28). These weaknesses simultaneously constituted threats, as they reduced scoring productivity and allowed the opposing team to dominate second-chance opportunities. Based on the SWOT matrix, the study emphasizes the need for strategic improvements focused on enhancing shooting accuracy, offensive rebounding control, and finishing effectiveness under competitive pressure. The novelty of this research lies in the integration of real-time quantitative match statistics with a structured SWOT analysis to generate evidence-based strategic recommendations. This approach provides practical insights for coaches and performance analysts and contributes to the limited body of research on data-driven strategic evaluation in women’s basketball at the provincial competition level.

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