Strength Sports Research Articles

Nutrition and Training Recommendations for Transgender and Gender-Diverse Athletes Involved in Strength Sports and Resistance Training: A Case Series of Nine Athletes Assigned Female at Birth.

Transgender and gender diverse (TGGD) athletes have distinct nutrition and training considerations. Guidance for nutrition and sport professionals working with TGGD athletes is lacking, especially when addressing sex-specific data. The purpose of this case series was to depict nutrition and training assessment approaches and recommendations for TGGD athletes involved in strength sports or resistance training. Six types of data informed each case presentation, including: demographic, anthropometric, health history, and survey data (Eating Competence Scale, Exercise Benefits and Barriers Scale); a 3-day food and physical activity record; and an in-depth interview. Nine TGGD athletes assigned female at birth (AFAB) presented with a range of gender identities, experiences, sport involvement, and transition journeys. Most athletes consumed inadequate energy and fiber, adequate or marginally high levels of saturated fat and added sugars, and high levels of sodium. Most athletes scored low on the Eating Competence Scale and high on the Exercise Benefits and Barriers Scale. Nutrition and sports professionals can individualize the care they provide for TGGD athletes when addressing sex-specific data and help athletes ensure they are meeting their nutrient needs.

Evaluation of the quality of life and the incidence of stress urinary incontinence in nulliparous women training selected sports: a cross-sectional survey pilot study

IntroductionThe number of women suffering from urinary incontinence is increasing every year. The most common type of this condition is stress urinary incontinence. Involuntary leakage of urine occurs when sneezing, coughing, laughing, and standing up, as well as during physical activity. The problem of urinary incontinence is very embarrassing for athletes and affects their sports performance. The aim of the study was to assess the occurrence of urinary incontinence symptoms in women regularly training in selected sports.Methods64 women athletes were selected for the study. This pilot study involved women training in athletics (short-distance running, long-distance running, hurdles and jumping (high jump, long jump, triple jump, pole vault), basketball, volleyball, or strength sports). Women were selected based on sample size calculation from those training in specified clubs. Women who had given birth were excluded from the study. The subjects completed a proprietary questionnaire consisting of 8 questions. They also completed the Urinary Distress Inventory, Short Form (UDI-6SF) questionnaire and the Incontinence Impact Questionnaire, Short Form (IIQ-7).ResultsIn this study, 43% of women who trained had symptoms of urinary incontinence. Regression analysis results with UDI-6SF and IIQ-7 total scores as dependent variables and age as an independent variable showed that the slopes of regression were not statistically significantly different (<i>p</i>-value > 0.05). The results of the analysis of the correlation between SUI (stress urinary incontinence) and age (<i>p</i> = 0.0247) and practiced sport (<i>p</i> = 0.0476) turned out to be statistically significant.ConclusionsThe type of sport practiced affects the occurrence of UI (urinary incontinence) symptoms in women. In this study, female athletes practicing strength sports had the greatest predisposition to the occurrence of UI symptoms. The occurrence of UI symptoms has little impact on the deterioration of the quality of life among women practicing selected sports.

Muscle strength in sport climbing: a systematic review and meta-analysis.

This study aimed to synthesize the literature comparing muscle strength and endurance characteristics between 1) sport climbers and non-climbing controls; 2) sport climbers at different performance levels; and 3) boulderers and lead climbers. A systematic literature search (PubMed, Embase and SportDiscus) was performed. Inclusion criteria involved participants aged ≥18, muscular performance measurements and comparisons of either: climbers and non-climbers, boulder climbers and lead-climbers, or climbers of different levels. Meta-analyses comparing grip strength and muscle endurance of the forearm between sport climbers and non-climbers, and finger strength between boulders and lead climbers were conducted providing the standardized mean difference (SMD). A total of 960 climbers and 301 non-climbers were included in the study. The data showed: 1) Compared to non-climbers, climbers showed significantly higher grip strength: SMD 1.82 (95% CI 1.23; 2.41, P<0.001) and underarm endurance: SMD 0.70 (95% CI 0.17; 1.24, P=0.01); 2) compared to lead-climbers, boulder climbers showed significantly higher finger strength: SMD 1.08 (95% CI 0.54; 1.62, P<0.001); 3) higher-level climbers showed better finger strength, grip strength, forearm endurance and powerslap when compared to lower-level climbers. Climbers had superior grip strength and forearm endurance compared to non-climbers. High-level climbers exhibited better finger strength, grip strength, forearm endurance and powerslap, when compared to lower-level climbers. Finally, boulder climbers exhibited greater finger strength than lead-climbers. These findings expand our understandings of climbers' physical attributes across disciplines and levels.

Fatigue fracture of the second rib in a professional athlete

A fatigue fracture, also known as stress fracture or overuse fracture, is caused by the summation of micro-injuries resulting from a chronic state of bone overload. It affects 1.4 %- 4.4 % of professional athletes. The most common site of fatigue fractures are the lower limbs. This is related to the heavy load caused by body weight and performing dynamic activities like jumping, running. Typical fractures are fractures of the fifth metatarsal bone, fibula and tibia, and less common fractures of the femur. Fractures involving the bones of the upper limbs and thorax are less commonly reported in the literature. It affect athletes in strength sports and athletes who perform dynamic and repetitive movements with their upper limbs, most often boxers, weightlifters, wrestlers, judokas, swimmers, golfers, rowers. Fractures in the thorax most often involve the first rib. Fractures of ribs II through XII are extremely rarely described. We present an unusual case of a second rib fracture in a professional athlete. A 26-year-old athlete training in racewalking reported increasing pain in the left scapula area 7 days before competing in the European Championships. Immediately after the competition, the pain changed location to the anterior thorax area, making movement of the upper limb and breathing much more difficult. A chest tomography was performed and it revealed a fatigue fracture of the second rib on the left side. The case report presents an atypical fracture in a female racewalking athlete and presents the uncharacteristic symptoms accompanying this fracture. Incorrect initial diagnosis and application of physiotherapy procedures without performing basic diagnostic tests, delay the diagnosis and initiation of proper treatment, and thus the athlete's recovery.

Preferences in the use of ergogenic AIDS in regular strength trainees

Background: The ergogenic effect is a highly practical and relevant topic in sports research, particularly in strength sports where numerous strategies have gained widespread recognition. Despite reports indicating challenges in the simultaneous use of various ergogenic strategies, our understanding of how they are practically employed is limited. This study aimed to determine and evaluate preferences in the use of nutritional and non-nutritional means of eliciting the ergogenic effect of individuals regularly participating in strength training.Materials and Methods: A total of 108 participants completed an original, online questionary shared on social media sites and created using Google Forms. Significance of differences was determined with Chi-square test.Results: A significant majority of responders declared use of nutritional (90%) and non-nutritional (62%) ergogenic aids, however only insignificant majority declared simultaneously using more than one ergogenic aid (56%). The most popular nutritional means of eliciting the ergogenic effect were caffein, coffee and creatine; non-nutritional were listening to music and dynamic stretching; the most popular combinations of two means of eliciting the ergogenic effect were caffeine with music and caffeine with creatine; and the most popular combinations of three means of eliciting the ergogenic effect were caffeine with creatine and music. Only age of participants influenced preferences in use of ergogenic means, where group 18 – 25 declared using non-nutritional means of eliciting ergogenic effect significantly more frequent.Conclusion: Results of the study indicate that the majority of polish as well as foreign strength trainees employ ergogenic aids, typically favoring well-established options supported by scientific literature.

Peculiarities of women's training in strength sports: methods and means

Peculiarities of women's training in strength sports: methods and means

Cardiac Adaptation in Power Athletes: Differential Impact of Judo and Weightlifting.

Background: According to the ESC guidelines, sport disciplines are classified in relation to the predominant component (skill, power, mixed and endurance), including a wide range of disciplines with different isometric/isotonic exercises and exercise-induced heart remodeling. The aim of our study was to evaluate differences in morpho-functional cardiac adaptations in power athletes, comparing judokas with weightlifters. Methods: We enrolled 55 Olympic athletes (38 judokas, 17 weightlifters), aged 24.5 ± 3.8 years, 25 (45.4%) of whom were males, and they underwent a pre-participation evaluation, including a physical examination, ECG, transthoracic echocardiogram, and exercise stress test. Results: The judokas presented significant differences in cardiac adaptations, with larger left ventricle (LV) end-diastolic and end-systolic volumes indexed (LVEDVi, p = 0.002 and LVESVi, p = 0.004) and higher LVMass values indexed (p = 0.033), but similar LV wall thicknesses (p = 0.093) and LV ejection fractions (p = 0.981). Also, the left atrium (LA) dimension (p = 0.0002) and volume indexed (p < 0.0001) were higher in the judokas, as were the larger right ventricle (RV) areas. Finally, the judokas showed higher VO2max (p = 0.012), O2 pulse (p = 0.007), VE/O2 LT1 (p = 0.041) and VE/O2 LT2 (p = 0.036) values, with a lower resting heart rate (p = 0.031) and higher exercise capacity (p = 0.011). Conclusions: The judokas showed substantial differences in cardiac morpho-functional adaptations from the weightlifters, and, accordingly, judo should be more properly considered not a pure strength sport but more similar to mixed disciplines of the ESC classification.

Cardiovascular Effects of Neurofeedback Course in Various Sports Adaptation Strategies: an Open Controlled Study

INTRODUCTION. Neurofeedback is effectively applied in clinical practice. Cardiovascular effects (CVEs) from different sports adaptation strategies in course-based β-rhythm neurofeedback are under-studied. AIM. To evaluate the CVEs of the neurofeedback course under different sports adaptation strategies. MATERIALS AND METHODS. The study included 1020 men (18–21 years) during the preparatory training period. Following groups were formed: 1 — cyclic sports (n = 387); 2 — speed-strength sports (n = 255); 3 — single combat (n = 31); 4 — team sports (n = 173); 5 — complex coordination sports (n = 174). The CVEs were assessed with the BOSLAB complex (Russia), with eyes open and muscles relaxed. EEG electrodes were applied bipolarly (Cz-Fz). Session types: graphic (10 minutes), game (16 minutes), where the β-rhythm level was increased and maintained. Indices of systemic pressure, cardiac activity; peripheral vessels, functional changes of the cardiovascular system (CVS) were also examined. RESULTS AND DISCUSSION. Along with improved attention, the 10th session revealed positive CVEs in the 1st, 3rd, 4th and 5th groups with CVS economization. 1st group: CVEs are a desirable response option. 2nd group: ambiguous heterochronic CVEs, with improved systemic pressure and reduced cardiac activity, indices of peripheral vessels, cardiovascular regulation index. These effects, mainly in strength sports, are caused by the long-term sports adaptation strategy, associated with hypoxia and incomplete recovery of the spent resources, causing incomplete adaptation. It is associated with mastering the β-rhythm control skill, different in the nature from the activities with the formed adaptation strategy in the long-term training process. 3rd group (10th session): changes in the brain structure (BS) function formed CVEs involving mechanisms maintaining systemic pressure, regarded as optimal. 4th and 5th groups: optimized BS and CVEs activities. CONCLUSION. The positive CVEs demonstrated expediency of the β-rhythm neurofeedback course. Ambiguous CVEs in groups of speed-strength sports are studied for neurofeedback technology modification.

Effect of double rocking jump rope training on lower limb muscle strength of badminton players.

Double rocking jump rope training can effectively enhance physical recovery, adaptability to exercise load, and lower limb muscle strength of badminton players in sports colleges, thus offering valuable insights for improving training methods in sports colleges and universities. To investigate the effect of double rocking jump rope training on the lower limb muscle strength of badminton players specializing in badminton in sports colleges. An experimental study was conducted through a ten-week teaching intervention experiment with badminton players. Relevant heart rate indexes and badminton related lower limb muscle strength indexes were measured before and after the experiment. The data of the measured relevant indexes were statistically and analytically analyzed. At the end of the experiment, the physical recovery level and the heart's adaptability to the exercise load of the control group were improved, and the lower limb muscle strength test indexes and sports performance were better than before the experiment. In the experimental group, badminton players' physical function, anaerobic metabolism of the body and other aspects also improved. The physical function of the experimental group of badminton players, the energy supply capacity of the body anaerobic metabolism and aerobic work capacity all have an enhancement effect, enabling badminton players to adapt to large exercise loads quickly and improve the recovery rate of physical fitness. The introduction of double rocking jump rope into badminton training classes in sports colleges and universities as a means of lower limb muscle strength training is conducive to improving the level of lower limb muscle strength of special badminton players, enriching the teaching and training means of lower limb muscle strength in sports colleges and universities, and broadening the research field of lower limb muscle strength in badminton in sports colleges and universities.

Czech Hercules: Gustav Frištenský, ‘Musculinity’, the Others and Visual Pleasure around 1900

Before 1900, in the Czech lands of the Habsburg Monarchy, the lean body of an athlete became a representation of strength, health, and beauty. Through Sokol gymnastics, the body of every Czech man was to be shaped into the form of the somatic mythotype Apollo. After 1900, in circuses, variety shows, and strength sports clubs, a new ideal man embodying somatic mythotype Hercules appeared: the strongman, who transformed a lightly muscled Apollonian shape into a modern Herculean form bulking massive shredded musculature. Strongman Gustav Frištenský in particular, whose body was eroticized, photogenized, nationalized, and racialized, embodied a mobilizing sports star who strengthened the Czech national community. Frištenský’s body was shaped by Hellenistic idealism, which gave rise to his adherence to the somatic mythotype of Hercules. This subsequently gave birth to ‘musculinity’, a new kind of hegemonic masculinity. The perception of Frištenský’s body was influenced by a physical resemblance to the Estonian wrestler Georg Lurich, by practices of othering, and the myth of white male supremacy. The steel and statuesque aesthetic of Frištenský’s body and the voyeurism of the masses then undermined traditional middle-class prudery and patriarchal control over the distribution of visual pleasure.

Can neuromuscular differences manifest by early adolescence in males between predominantly endurance and strength sports?

Although neuromuscular function varies significantly between strength and endurance-trained adult athletes, it has yet to be ascertained whether such differences manifest by early adolescence. The aim of the present study was to compare knee extensor neuromuscular characteristics between adolescent athletes who are representative of strength (wrestling) or endurance (triathlon) sports. Twenty-three triathletes (TRI), 12 wrestlers (WRE) and 12 untrained (CON) male adolescents aged 13 to 15years participated in the present study. Maximal voluntary isometric contraction (MVIC) knee extensor (KE) torque was measured, and 100-Hz magnetic doublets were delivered to the femoral nerve during and after KE MVIC to quantify the voluntary activation level (%VA). The doublet peak torque (T100Hz) and normalized vastus lateralis (VL) and rectus femoris (RF) EMG (EMG/M-wave) activities were quantified. VL and RF muscle architecture was also assessed at rest using ultrasound. Absolute and relative (to body mass) KE MVIC torques were significantly higher in WRE than TRI and CON (p < 0.05), but comparable between TRI and CON. No significant differences were observed between groups for %VA, T100Hz or either VL or RF muscle thickness. However, VL EMG/M-wave was higher, RF fascicle length longer, and pennation angle smaller in WRE than TRI and CON (all p < 0.05). The wrestlers were stronger than triathletes and controls, potentially as a result of muscle architectural differences and a greater neural activation. Neuromuscular differences can already be detected by early adolescence in males between predominantly endurance and strength sports, which may result from selection bias and/or physical training.

Deloading Practices in Strength and Physique Sports: A Cross-sectional Survey

BackgroundThis study explored the deloading practices of competitive strength and physique athletes. A 55-item anonymised web-based survey was distributed to a convenience-based, cross-sectional sample of competitive strength and physique athletes (n = 246; males = 181 [73.6%], females = 65 [26.4%]; age = 29.5 ± 8.6 years) who had 8.2 ± 6.2 years of resistance training and 3.8 ± 3.1 years of competition experience.ResultsAll athletes deloaded within training with energy and fatigue management being the main reasons to do so. The typical duration of a deload was 6.4 ± 1.7 days, integrated into the training programme every 5.6 ± 2.3 weeks. Deloading was undertaken using a proactive, pre-planned strategy (or in combination with an autoregulated approach) and undertaken when performance stalled or during periods of increased muscle soreness or joint aches. Athletes reported that training volume would decrease (through a reduction in both repetitions per set and sets per week), but training frequency would remain unchanged during deloads. Additionally, athletes reported that training intensity (load lifted) would decrease, and effort would be reduced (facilitated through an increase in repetitions in reserve). Athletes would generally maintain the same exercise selection during deloading. For athletes that supplemented deloading with additional recovery modalities (n = 118; 48%), the most reported strategies were massage, static stretching and foam rolling.ConclusionResults from this research might assist strength and physique athletes and coaches to plan their deloading. Future research should empirically investigate the findings from this study to further evaluate the potential utility of deloading in strength and physique sports.

Development of strength abilities of high school students by means of health fitness

The article highlights the problem of developing strength abilities in high school students by means of fitness in a physical culture and health center. It is emphasized that one of the most effective means of maintaining the proper psycho-emotional and physical condition of schoolchildren in the conditions of war in Ukraine is regular physical activity. In this regard, the improvement of the entire system of physical education, in particular, of high school students, is one of the directions for improving their health, increasing motivation for physical education both in educational institutions and in physical culture and health facilities. Іt is noted that strength fitness classes are popular among high school students, which includes a large number of various training programs that differ in their structure, content, and implementation methods. Thus, the purpose of the study is to highlight the theoretical and methodological features of strength fitness classes for high school students in a physical education and health center. Attention is focused on the fact that the method of using strength exercises in health fitness is significantly different from that in strength and speed-strength sports, since the main task of the classes is not the maximum development of strength qualities, but the improvement of the physical condition of the participants. The basic principles of strength training include the correct selection of strength exercises, repetitions, sets (approaches), the pace of exercises and the amount of weight, rest intervals. The authors defined the means and methods of developing strength abilities, the requirements for planning a fitness program for young men aged 15-17, outlined the criteria for the effectiveness of strength fitness classes, and developed methodical recommendations. Therefore, the technology of developing strength abilities includes: analysis of age, sex, and individual characteristics of the development of strength and speed-strength abilities; implementation of the principles of physical education in the process of strength development; methods of strength development (means and methods of strength development; load and rest; programming, forms of organization of classes); pedagogical control over the development of strength abilities. Means of recovery of working capacity should also be used: massage, vitaminization, rational nutrition.

Weighing the Body: Women Olympic Weightlifters Negotiating Weight Class, Body Image, and the Unruly Body

Women athletes’ experiences of gendered body ideals and empowerment have been well-documented. However, the existing literature largely neglects strength sports, which have a complex relationship with gendered norms given their historical association with masculinity and wide range of weight classes. In this article, we use a feminist poststructuralist lens to explore how eight Olympic Weightlifters participating in the women’s category choose their weight classes while balancing strength, competitiveness, and esthetics. Participants often referenced sport-specific and gendered body discourses when choosing their weight classes, yet also identified a nondiscursive element that could force them to forego athletic and esthetic body ideals: the body itself. Based on these narratives, we suggest that awareness of the “rebellious body” be considered an important element of women athletes’ bodily empowerment.

Nutrological aspects of polyphenols and gut microbiota in sports performance: a systematic review

Introduction: In the context of nutrology and sports performance, the focus for intake in athletes and physically active individuals has been directed to the main class of polyphenols. Interest in a personalized approach is increasing in sports to maximize each individual's athletic ability in endurance and strength sports. Polyphenols represent a heterogeneous class of compounds with marked antioxidant and anti-inflammatory properties. The impact of the gut microbiota on the bioavailability and activity of polyphenols is highlighted. Objective: It was to carry out a systematic review to highlight the main relationships between polyphenols, gut microbiota, and sports performance. Methods: The systematic review rules of the PRISMA Platform were followed. The research was carried out from May to July 2023 in Scopus, PubMed, Science Direct, Scielo, and Google Scholar databases. The quality of the studies was based on the GRADE instrument and the risk of bias was analyzed according to the Cochrane instrument. Results and Conclusion: A total of 115 articles were found, and 81 articles were evaluated in full and 76 were included and developed in this systematic review study. Considering the Cochrane tool for risk of bias, the overall assessment resulted in 6 studies with a high risk of bias and 10 studies that did not meet GRADE. As a result and conclusion, it was shown that the metabolic mechanisms favored by polyphenols improve sports performance, improve cardiometabolic functions, reduce recovery times and post-exercise pain, maintain a low degree of oxidative stress, and avoid unregulated inflammatory processes. Thus, polyphenols are able, through their interaction with the gut microbiota, to favor the proliferation of bacterial genera of great importance for metabolic and cognitive functions, such as Akkermansia, Lactobacilli, and Bifidobacteria. Gut microbiota metabolizes polyphenols in the colon to produce small bioactive molecules that exert epigenetic mechanisms on biochemical pathways modulating gene expression. Polyphenols have multiple biological effects, and future exercise studies should be appropriately and specifically designed to determine the physiological interactions between exercise and the selected supplement, rather than just considering performance.

Does the 2d:4d ratio present a relationship with static strength indicators in elite paralympic power-lifting?

Background: Paralympic Powerlifting is a strength sport. On the other hand, the relationship between force indicators and the ratio of the lengths of the second and fourth fingers of the hand (D2:D4) has been investigated. Objectives: To evaluate the relationship of the D2:D4 finger length ratio with performance in Paralympic Powerlifting. Methodology: Thirteen elite Paralympic Powerlifting athletes were evaluated for static force indicators, Rate of Force Development (RFD), Maximum Isometric Force (MIF), Impulse, Variability, and Time to MIF. The D2:D4 ratios were measured, and correlations were made between the various possibilities of D2:D4 ratios and static force indicators. Results: Moderate correlations were found between RFD and Left D4 ("r" = 0.569) and between Variability and R-L D2:D4 Difference. ("r" = 0.570). However, no correlation was found between D2:D4 ratios and static force indicators in Paralympic Powerlifting athletes for the other variables. Conclusion: The D2:D4 ratio does not seem to be a reliable predictor of static force indicators in Paralympic Powerlifting athletes. Keywords: Performance predictor, Prenatal testosterone, Paralympic Powerlifting

Effects of Different Nutritional Patterns and Physical Activity on Body Composition: A Gender and Age Group Comparative Study.

This cross-sectional study analyses differences in dietary habits, taste preferences, variety of protein sources and body composition (BC) profiles among individuals following omnivorous, flexitarian, lacto-ovo-vegetarian and pescatarian diets. Furthermore, it assesses the correlations between these dietary patterns and various sports, classified by exercise intensity, in relation to BC parameters. The study analysed the eating habits and BC data of 1342 participants aged 18-65 years, classified into four diet groups based on their 7-day food diaries and questionnaire responses. Our analysis revealed gender- and age-related differences in weekly food consumption and protein source variety, with men generally consuming more meat, processed meat and fish than women, especially in younger age groups. Differences in dairy and soy consumption were also noted between age groups, while legume and soy preferences showed no gender disparity across all ages. Among non-sporting individuals, vegetarians exhibited lower fat mass (FM%) compared to other diets, while among athletes, vegetarians and pescatarians in in endurance and strength sports, respectively, displayed lower FM%, with flexitarians and omnivores in endurance sports showing higher FM%. Non-athletic omnivores and vegetarians demonstrated a greater proportion of body protein, while among athletes, those engaged in strength training exhibited a higher body protein content across all dietary groups compared to those in endurance training. Among non-athletic groups, vegetarians exhibited the lowest FM/FFM (fat mass/fat-free mass) ratio, while among athletes, vegetarians in endurance sports and participants in strength training across other diets showed lower FM/FFM ratios. The results emphasise the complex interaction between diet, BC and lifestyle choices, revealing how different combinations of diet and sport are associated with optimised BC.

Co-creating holistic injury prevention training for youth handball: Development of an intervention targeting end-users at the individual, team, and organizational levels

BackgroundInterventions that are co-created with end-users, and that are informed by behavior change or implementation theories, support implementation in real world settings. However, injury prevention programs for youth athletes have typically been developed by experts with no, or insufficiently described, end-user involvement and without guidance by theories. The aim of the current study was to describe the development of a holistic injury prevention intervention for youth handball targeting end-users at different levels, through using knowledge from end-users and researchers/experts and applying relevant behavior change and implementation theories.MethodsKnowledge from researchers/experts (sports medicine, sport psychology, handball, physical therapy, strength and conditioning (n = 14)) and end-users (coaches, players, club administrators, n = 16), and applying relevant implementation (Consolidated Framework for Implementation Research, CFIR), behavior change (Health Action Process Approach, HAPA) and motivational (Self-Determination Theory, SDT) theories, were used to co-design the intervention. Early end-users (coaches (n = 6), players (n = 3) and a club administrator (n = 1)) were interviewed for initial feedback.ResultsThe intervention consisted of end-user-targeted information and training that was made available in a specifically developed interactive mobile application with modules for players, coaches, club administrators, and caregivers. Information for all end-users included benefits and principles of physical and psychological injury prevention training, load-management, motivation, and communication. Information about implementation was developed for club administrators specifically. For coaches, training to do with their teams included handball-specific injury prevention exercises (legs, shoulders, core) combined with psychological aspects (motivation, task focus, body awareness) to integrate within warm-up and handball skills training. Training for players included handball-specific multi-joint strength, power, and explosive exercises (legs, shoulders, core) and sport psychology exercises (self-awareness, relaxation, being in the present moment, prevent and handle stress). To support self-management, adoption, and motivation, programs were provided, and players and coaches could change, add, progress the difficulty of exercises, and build their own programs. Initial feedback from early end-users was generally positive.ConclusionsUtilizing an approach where researchers/experts and end-users co-created injury prevention training specifically for youth handball, an intervention was generated that included information and holistic training targeting end-users at the individual (players, caregivers), team (coaches), and organizational (club administrators) levels.

Differences in Approach and Avoidance Motivation Sensitivities Predicting Participation and Performance in Strength Sport

Abstract Cusimano, K, Freeman, P, Moran, J, and Yamaguchi, M. Differences in approach and avoidance motivation sensitivities predicting participation and performance in strength sport. J Strength Cond Res 38(1): 180–184, 2024—Gray's Reinforcement Sensitivity Theory proposes that individual differences in behavior are due to the sensitivity to 2 brain systems: the behavioral inhibition system (BIS), which regulates aversive emotions to threatening stimuli, and the behavioral approach system (BAS), which regulates positive emotions toward rewarding or nonpunishing stimuli. The current study investigated whether BIS and BAS sensitivity predicts participation and performance in strength sports. A sample of 177 competitive strength athletes (male = 148; female = 29; mean age = 28.68; SD = 6.24 years) and 178 control participants (male = 89; female = 89; mean age = 29.39; SD = 7.42) completed the BIS/BAS scale, with strength athletes also providing their Wilks scores as a measure of sporting performance. Independent t tests showed significantly higher BIS (MD = 2.37, p = 0.003, 95% CI [0.79, 3.94], d = 0.31) and total BAS (MD = 11.71, p &lt; 0.001, 95% CI [9.26, 14.15], d = 1.00) sensitivity in strength athletes than individuals in the control group. A 3-step hierarchical regression analysis revealed that the number of training years (β = 0.506, p &lt; 0 .001), BIS (β = −203, p = 0.005) and BAS drive (β = 0.188, p = 0.012) made significant unique contributions to predicting the Wilks score, with no significant contributions of age, sex, BAS fun seeking, and BAS reward responsiveness. The findings indicate that the overall reward sensitivity (total BAS score) and reward seeking (BAS drive) are associated positively with participation and performance in strength sports, respectively. Given the association of these brain systems to addiction and other psychiatric disorders, the findings could have implications in psychiatric treatment and sporting recruitment.

Modified-release gliclazide acutely improves recovery but causes undesirable blood glucose decrease after a resistance exercise session in healthy adults: a pilot study for a randomized clinical trial.

Sulfonylureas have been used to improve performance in strength sports. However, this hypothetical effect has not been proven. We examined the ergogenic acute effect of gliclazide on resistance training performance and muscle recovery. We conducted a double-blind, randomized, crossover pilot study with 10 healthy resistance-trained adults (29.3 ± 4.4 years), nonusers of anabolic steroids. The participants were randomized to two exercise sessions. In the first session, five participants received placebo and the other five received gliclazide modified release, both administered 8 hours before the session. Session two was performed in a crossover fashion a week later. The volume load was calculated as the maximum number of repetitions of four sets multiplied by load (65% 1-RM). Blood samples were collected before and after exercise, as well as 24 hours and 48 hours after exercise for measurement of creatine kinase (CK-MM) and lactate dehydrogenase (LDH) activity. Blood glucose was measured with a glucometer before, during, and after the exercise sessions. Gliclazide did not enhance volume load for bench press (placebo: 2,698.0 ± 923.0 kg; gliclazide: 2,675.0 ± 1,088.0 kg; p = 0.073) or leg press (placebo: 10,866.0 ± 2,671.0 kg; gliclazide: 10,817.0 ± 2,888.0 kg; p = 0.135). However, CK-MM (-27.7%; p = 0.034) and LDH (-21.1%; p = 0.021) activities were decreased with gliclazide 48 hours after exercise. There was also a decrease in blood glucose in the gliclazide compared with the placebo session (p = 0.018). Gliclazide did not enhance performance in a single resistance training session, but promoted faster muscle recovery. The decrease in blood glucose post-exercise with gliclazide was an undesirable effect that could lead to long-term glucose metabolism disorders. Registered in ClinicalTrials.gov under number NCT04443777.