Distance Runners Research Articles

小学校高学年児童の持久走における3種類の指導方法の比較

小学校高学年児童の持久走における3種類の指導方法の比較

Mediation role of cardiorespiratory fitness on association of physical activity and physical literacy among 8-12 years old children: the PAK-IPPL cross-sectional study.

The effect of cardiorespiratory fitness (CRF) on the relationship of physical activity (PA), and physical literacy (PL) in 8-12 Pakistani children are largely unknown. Therefore, this study aims to examine the mediating role of CRF in the relationship between PA and PL in this demographic. This cross-sectional study involved 1,360 children aged 8-12 (mean age = 10.00, SD = 1.41 years) from 85 higher secondary schools in South Punjab, Pakistan. Data were collected during the 2020-2021 academic year using the Canadian Assessment of Physical Literacy-2 (CAPL-2) protocol to assess physical activity (PA), Body Mass Index (BMI), and PL levels. CRF was measured using the PACER (Progressive Aerobic Cardiovascular Endurance Run) test. Descriptive statistics, independent samples t-tests, Chi-squared tests, and Generalized Additive Models for Location, Scale, and Shape (GAMLSS) were used for age and sex-specific CAPL-2 scoring. Associations among components were evaluated through Pearson's correlation, multivariate logistic regression, and mediation analyses. The study revealed that boys had significantly higher scores in CRF, PA, and PL across all age groups compared to girls (p < 0.001), with boys' scores being 20%, 10%, and 14% higher, respectively, than those of girls. Conversely, overweight children showed significantly reduced PA and PL levels (p < 0.001). An inverse correlation was found between BMI and CRF (r 2 linear = 0.022; quadratic = 0.028). CRF scores had significant negative correlations BMI (r = -0.143) and positive associations with MVPA, PA, DB, and PL (r ranging from 0.241 to 0.624). CRF was observed to partially mediate the association between MVPA and PL. The direct impact of PA on PL was significant and meaningful (β = 0.002, p < .001). Additionally, the indirect effect of PA on PL through CRF was also significant (β = 0.001, p < .001), indicating that CRF serves as an important mediator in this relationship. The combined total effect of PA on PL, which includes both direct and mediated pathways, was robust and highly significant (β = 0.003, p < .001). The study revealed a strong positive correlation between CRF, PA, and PL, but a negative one with BMI in South Punjab children aged 8-12. Notably, CRF and PA emerged as significant predictors of PL levels in this population. Consequently, interventions that are both systematic and targeted towards improving these factors should be implemented as strategies to enhance children's PL levels and promote physically active behaviors.

Application of arbitrary and individualized load quantification strategies over the weekly microcycle in professional soccer players.

The aims of this study were to: (a) determine the differences in external load quantification between arbitrary and individual speed thresholds over the weekly microcycle in professional soccer players, and (b) analyse the association between internal load and different external load quantification strategies (ELQSs). Ten professional outfield players were monitored during training sessions and official matches using 10 Hz GPS devices over a 6-week in-season period. The absolute and relative ("R" before the distance category) distances covered were calculated for the following external load variables: medium-intensity running distance (MIR), high-intensity running (HIR), sprint distance (SD), and very high-intensity running (VHIR). Individualized thresholds were determined based on maximal sprinting speed (MSS) and the last speed achieved during the 30-15 Intermittent Fitness Test (VIFT) of each player. In terms of match-day workload, significant differences (p < 0.05) were observed between arbitrary and individualized strategies (i.e., MSS and VIFT) for the distance covered in MIR, HIR, SD, VHIR, RHIR, RSD, and RVHIR. The MSS strategy compared to arbitrary thresholds revealed significant differences (p < 0.05) for distance covered in HIR, RHIR, and VHIR during all training sessions. The present results showed that arbitrary thresholds lead to underestimation of external load absolute and relative metrics compared to the MSS strategy throughout the microcycle. The VIFT strategy mainly revealed differences in external load quantification regarding MD compared to arbitrary thresholds. Individualized speed threshold strategies did not achieve better associations with internal load measures in comparison with arbitrary thresholds in professional soccer players.

Do all matches require the same effort? Influence of contextual factors on physical demands during official female handball competitions.

Understanding the influence of contextual factors on physical demands is essential to maximize performance in handball. The purpose of this study was to explore and compare the influence of contextual factors (halves of the match, level of the opponent, match outcome and player role) on external load during official matches in women's handball. Twenty-two semi-professional female players from the Spanish 2nd Division were monitored across 13 official home matches. Total distance covered (TDC), high-speed running distance (HSR), high-intensity breaking distance (HIBD), accelerations (ACC), decelerations (DEC) and PlayerLoad (PL) were collected in absolute and relative values (normalized by playing time) using a local positioning system (WIMU PRO, Realtrack Systems S.L., Almería, Spain). HSR, HSR/min and HIBD/min decreased during the second half (p < 0.05; small effects). Regarding the level of the opponent, high-level and middle-level teams elicited higher TDC/min, HIBD/min and PL/min than low-level teams (p < 0.05; small-moderate effects). Additionally, starter players exhibited higher absolute values of external load (TDC, HSR, HIBD, ACC, DEC and PL) compared to non-starters (p < 0.05; moderate-large effects). Match outcome did not affect the physical demands (p > 0.05). The study indicated that halves of the match, level of the opponent, and player role influenced external load experienced by players during official matches; specifically, starter players showed higher absolute values of external load compared to non-starters. This information should be considered in managing load and developing strategies to minimize fatigue and enhance performance during matches.

A mixed antioxidant supplement improves cognitive function, and coordination in aged mice.

Accumulation of oxidative damage increases the risk of several disorders. To prevent these diseases, people consume supplements. However, there is little evidence of the impact of supplement intake on cognitive function. Recently, frailty and sarcopenia have become serious issues, and these phenomena include a risk of mild cognitive impairment. In this study, aged mice were fed the combination supplement and cognitive and motor functions were measured. Following 1 month of treatment with the supplement, significant improvements in cognitive function and neuromuscular coordination were observed. Following 2 weeks of treadmill training, treatment with the supplement dramatically increased running distance compared to that in untreated normal aged mice. Serum indices such as triglyceride and total cholesterol were significantly decreased in the supplement-treated aged mice compared to untreated aged mice. These results indicate that the combination supplement may play a role in maintaining cognitive function, coordination ability and improving lipid metabolism.

The physical demands of the match according to playing positions in a South African Premier Soccer League team.

Evidence indicates that international soccer players cover a total distance of between eight and 14 km in a match. Approximately 80 - 90% of this distance constitutes low-intensity actions, and about 10 - 20% is high-intensity. These data are influenced by playing position, formation, league standard, and national differences in different countries. To quantify the physical demands of competitive matches on the different playing positions in a South African Premier Soccer League team. A descriptive study design included 21 players on the same team. Data were collected over 23 official matches during the 2019/2020 season using PlayerTek GPS devices (10Hz). The data collected included total distance covered, high-intensity running distance, power plays, top-end speed, and distance per minute. Statistical differences were evident only in the high-intensity running distance and power plays. The centre-forwards (p<0.001), attacking central midfielders (p=0.006), and full-backs (p=0.01) covered the most high-intensity running distance (p<0.001) than centre-backs. The attacking central midfielders and centre-forwards recorded more power plays than the centre-backs. Total distance (p=0.01), power plays (p=0.004) and distance per minute (p=0.001) were lower in the second half than in the first half of the match. Centre-forwards performed more high-intensity actions, whereas the centre-backs sprinted less than all the other positions. These data provide insight into the positional differences that exist and could help coaches to prescribe position-specific training programmes.

Effect of the phase of the season and contextual variables on match running performance in Spanish LaLiga football teams.

This study aimed to examine the intra-season variation and the effects of contextual variables on total distance (TD), high-intensity running distance (HIRD) and high-speed distance (HSD) covered by Spanish football teams. The sample included 20 professional teams that competed in the Spanish LaLiga during the 2021-2022 season. Data were recorded using the TRACAB (ChyronHego, New York, USA) multicamera computerized optical tracking system. Multilevel linear mixed models were used to examine the effects of five contextual variables (1: phase of the season in six periods, 2: match location, 3: opponent ranking, 4: team ranking and 5: congested schedule) on TD, HIRD and HSD. Teams increased the running performance from period 1 to 5 of the season in TD (+2.2%; P < 0.05) and from period 1 to 4 in HIRD (+7.2%; P < 0.05), while a declining effect was found in period 6 for both TD (-1.2%; P < 0.05) and HIRD (-5.8%; P < 0.05). More HIRD (+1.5) and HSD (+5.3) were covered at home (P < 0.05), and more TD and HIRD were covered when playing against opponents ranked in the first (+2.4% and +5.3%, respectively; P < 0.05) and second quartile (+1.2% and +5.0%, respectively; P < 0.05), compared to teams from the fourth quartile. Football coaches and fitness specialists should note that running performance of Spanish teams increased throughout the season, but it declined during the last matches of the competition. Additionally, home matches and highranked opponents elicited higher running demands.

Factors Informing Training Load During the Transition From Club to National Football Teams.

This study examined the relationship of precamp match exposure, travel demands, perceptual wellness, and musculoskeletal screening with ensuing training load (TL) during national-team (NT) duties for international footballers (soccer). Match minutes and days since last match prior to NT arrival were collected for match exposure. Travel duration and time-zone difference were included as travel demands. Perceptual fatigue, soreness, sleep quality, and stress scores were collected via self-report questionnaire on arrival to NT. Musculoskeletal testing on day 1 of NT included knee to wall and hip internal and external rotation. Relative TL across the first 3 days of NT camp was measured via total distance, high-speed runningdistance, very high-speed running distance, and accelerations and decelerations per minute. Linear mixed models determined the influence of independent variables on respective TL metrics, with the player included as a random effect. Total distance, high-speed running, very high-speed running, and decelerations per minute were all highest on day 3 (P < .001). Small relationships existed (R2 < .15) between decreased total distance per minute and increased soreness (P = .037), while decreased high-speed running per minute was associated with increased fatigue (P = .017). Small associations existed between decreased accelerations per minute, increased hip internal rotation(P < .001), fatigue (P = .033), and knee to wall (P = .016), while decreased decelerations per minute were associated with increased soreness (P = .001), knee to wall (P = .024), and days between recent match and arrival (P = .003). Very small relationships existed between fatigue, soreness, musculoskeletal screening, and prior match exposure with TL. The larger influence of camp day suggests that deliberate periodization of training is a major factor for prescription on arrival into NT duties.

Factors Influencing Hard Running Distances in National Collegiate Athletics Association Division I Women’s Soccer Players

As the total distances covered in soccer games have remained relatively constant, the hard running distances (HRDs) covered by players have shown variations due to the higher physical demands and dynamics of team running performances. Although factors affecting the total distances covered in a match are multifactorial, no study has specifically examined match performance indicators (MPIs) that impact HRD. Consequently, the purpose of this study was to better understand how MPIs (hard running efforts, turnovers, minutes played, duels won, duels lost, and pass completions) are associated with HRD and to investigate how each variable contributes to HRD using multiple regression analysis. The study included a sample of 21 female Division I soccer players aged between 18 and 22 years (mean ± SD = 20 ± 1.32 years), all of whom were outfield players: center backs (n = 5), defensive midfielders (n = 4), outside midfielders (n = 5), center-attacking midfielders (n = 4), and center forwards (n = 3). Overall, all MPIs were positively associated (.639 ≤ r ≤ .992) with HRD, yet hard running efforts showed the strongest relationship with HRDs (r = .992). The regression models indicated that all variables contributed to HRD. In particular, hard running effort had the most significant impact (p &lt; .001), implying its dominant influence on HRD compared with other variables. These findings may play a pivotal role in supporting coaches and trainers to better understand the influence of MPIs on HRD. The models developed could help predict a player’s workload related to HRD.

Same Training for Everyone? Effects of Playing Positions on Physical Demands During Official Matches in Women’s Handball

The purpose of this study was to analyze and compare the differences between playing positions on physical demands during official matches in women’s handball. Twenty-two semi-professional female players (4 wings, 14 backs and 4 pivots) from the Spanish 2nd Division were monitored across 13 official home matches. Total distance covered (TDC), high-speed running distance (HSR), high-intensity breaking distance (HIBD), accelerations (ACC), decelerations (DEC) and PlayerLoad™ (PL) were collected in absolute and relative values (normalized by playing time) using a local positioning system (WIMU PRO™, Realtrack Systems S.L., Almería, Spain). Playing positions differences were determined by variance analysis one-way ANOVA with partial Etasquared (ηp2) or epsilon-squared (ε²) and Cohen’s effect size (ES). Wings covered more TDC (3414.5±1710.1 m), HSR (492.7±280.0 m) and HIBD (171.2±104.7 m) compared to backs and pivots (p&lt;0.05; moderate-large effects). Wings also registered more total number of ACC (750.5±362.2) and PL (85.0±7.8 a.u.) compared to backs and pivots (p&lt;0.05; moderate-large effects), whereas backs performed more ACC/min (19.9±1.1 n·min−1) than wings (18.9±1.4 n·min−1) and pivots (18.4±3.9 n·min−1) (p&lt;0.05; moderate effects). In conclusion, physical demands differ between playing positions during official female competitions and these differences should be considered by practitioners to better prescribe and periodize training load and to design more individualized training programs.

External training load and performance recovery after small-sided games in soccer: Insights for return-to-play management.

The return-to-play process' characteristics can vary by injury and sport type but are typically composed of phases of different durations, training targets, and intensities that gradually increase the physiological and mechanical load. In team sports, contact drills are a necessary part of the last phases of this process, and they should be planned using the optimal mechanical load. The present study investigated the external load and kinetic recovery in U19 soccer players performing 6vs6 and 3vs3 small-sided games. A global positioning system (GPS) measured external load metrics. The rate of perceived exertion (RPE) was registered at the end. Total quality of recovery (TQR) was collected at the beginning of the training session and after 24 h. Moreover, before and after the small-sided games (SSGs) and at 24 h, delayed-onset muscle soreness (DOMS) of the legs, sprinting time, and vertical jump height (CMJ) were collected. 6vs6 presented higher values in total distance low-, moderate-, high, and very-high-speed distance, and maximum speed (p < 0.05). However, 3vs3 showed higher number of sprints, acceleration, and deceleration at different intensities. Furthermore, no difference was shown in RPE. The effect of fatigue on sprint seems greater for 6vs6, showing an impairment persistent at 24 h (p < 0.05). Moreover, CMJ height was impaired after 6vs6 and at 24 h (p < 0.05) but did not change after 3vs3 (p > 0.05). DOMS values after SSGs and at 24 h were higher than baseline for both conditions (p < 0.05), while TQR decreased at 24 h in both conditions (p < 0.05). Based on our results, it seems that 6vs6, leading to a greater high-speed running distance, might cause a training load that needs more time to recover. This point may be crucial in a return-to-play process, especially when hamstring muscles are involved.

Match running performance is similar in lower and higher competitive standards of Spanish professional soccer accounting for effective playing time.

This study aimed to compare match running performance of players in the top two competitive standards of Spanish professional soccer, accounting for effective playing time (the duration of play after subtracting the game interruptions). A total of 2,784 match observations from 44 teams competing in the Spanish First Division (LaLiga Santander) and the Second Division (LaLiga Smartbank) were undertaken during two consecutive seasons (from 2021/22 to 2022/23). Total distance (TD), medium-speed running (MSR, distance 14.1-21 km · h-1), high-speed running (HSR, > 21 km · h-1), very high-speed running (VHSR, 21.1-24 km · h-1) and sprinting speed running distance (Sprint, > 24 km · h-1) were analyzed using a computerized tracking system (TRACAB, Chyronhego, New York, NY). These physical performance variables were calculated for both total and effective playing time. The main results showed that the mean effective playing time was significantly higher in matches of the First Division than in the Second Division (p < .01). In contrast to those observed when total playing time was considered, there were no significant differences (p > .05) between both competitive standards on medium speed running (MSR), high speed running (HSR), very high-speed running (VHSR), and sprint distances when the effective playing time was considered. Such findings demonstrate that contrary to previous research match running performance of players was similar in lower and higher competitive standards. Thus, effective playing time should be taken into account when interpreting the match running performance of professional soccer players.

Interaction of oat bran and exercise training improved exercise adaptability via alleviating oxidative stress and promoting energy homeostasis.

Skeletal muscle performance is influenced by both diet and the mode of exercise, with diet playing a crucial role in individuals' adaptation to exercise training. Our study investigated the interaction of oat bran (OB) diet and moderate intensity exercise training (MIET) on skeletal muscle function and athletic performance. Studies have reinforced the positive association of high-fat diet (HFD) with chronic systemic inflammation and corresponding peripheral skeletal muscle dysfunction during exercise training. OB could alleviate the inflammation, oxidative stress, and energy homeostasis disorder associated with HFD. We observed improvement in mice limb grip strength and endurance treadmill running distance with OB intake, accompanied by regulation of muscle function-related gene expression. OB intensified exercise training-induced carbohydrate and lipid metabolism, as indicated by changes in lactate, fumarate, malate, pyruvate, succinate, and citrate levels. Additionally, specific probiotic genera producing short-chain fatty acids (SCFAs) were promoted, while inflammation-related circulating metabolites were significantly decreased with oat bran intake. Our findings suggest interactions between OB and MIET improved HFD-induced skeletal muscle dysfunction on both the phenotype and the related mechanisms. This study is an extension of our previous study on the anti-fatigue effect of oat bran, providing a novel prospective by integrating exercise adaptation, gut microbiota, molecular metabolism and skeletal muscle in situ analysis.

Prevalence of Achilles Tendinopathy among Physical Therapists of Pakistan

It is a degenerative disease that affects the tendon of Achilles, which attaches the gastrocnemius muscle to the heel bone. The rate of prevalence in the general population is about 6 percent, in athletes about 24 percent, 36 percent in short-distance runners, and in middle and long-distance runners about 52 percent. Objective: To determine the frequency of Achilles tendinopathy in Physical therapists of Pakistan. Methods: The cross-sectional study was done through an online survey among the Physical Therapists of Pakistan. The estimated sample size calculated from the Raosoft.com software was 449 participants. The sampling technique used in this study was convenient. The data was collected through a validated questionnaire named a Victorian Institute of Sports Assessment- Achilles( VISA-A) measurement tool, ranging from 0 to 100 in which higher scores showed least symptoms while lower scores showed severe symptoms. Statistical analysis was done through SPSS version 23.0. Results: Out of 449 research participants between the ages of 22 to 50 years were evaluated through a validated questionnaire and the result shows 298 (66.36%) of participants participated in sports activities and the level of pain was evaluated as 95(21.15%) of participants fell in healthy, 238(53%) in mild, 97(21.60%) in moderate however 19(4.23%) participants fall in severe category of pain. Conclusions: Our study concluded that the occurance of Achilles tendinopathy is uncommon among the physical therapists population of Pakistan.

"Zátopek" – komiksowa codzienność długodystansowca

Zátopek: The Comic Version of the Everyday Life of a Long-distance Runner The comics signed by scriptwriter Jan Novák and illustrator Jaromír 99 follow a particularly well-thought-out authorial strategy. They tell the story of post-war Czechoslovakia, their protagonists are authentic figures, and their approach has little in common with the uncritical glorification so often found in (not only graphic) biographies. Created in 2016, the first of the works is dedicated to Emil Zátopek, a long-distance runner, three-time gold medalist at the Helsinki Olympics, and a man who got caught up in the political realities of the 20th century. The article analyzes the various contexts of diegetic conditioning (including the rituals of everyday life inscribed in the narrative), the critical reception of the book in the Czech Republic, and the correspondence between the sensibilities of the authors and other modes of memory management in a field explored in (popular) culture.

The Crucial Role of Carbohydrate Intake for Female Long-Distance Runners : A Literature Review

This research is a literature study that aims to explore the relationship between carbohydrate consumption and athlete performance and health, especially female athletes who run long distances. This study uses the method of literature study or literature review using secondary data from scientific journal articles. Article searches are conducted through various platforms such as Google Scholar, EBSCO, ScienceDirect, and Proquest using keywords related to carbohydrate consumption in female long-distance runners. The inclusion criterion for articles is that they must be scientific journal research articles conducted in the UK with the main subject female athletes long-distance runners and the topic relates to carbohydrates. Articles that meet these criteria are then further analyzed Through an analysis of 8 scientific journal articles, it was concluded that carbohydrate intake has a crucial role in improving athletes' performance and endurance, as well as preventing the risk of low energy availability that can have a negative impact on health. In addition, research also highlights the need for adjustments in carbohydrate intake based on environment and stress to maximize athletes' training and recovery abilities. These findings affirm the importance of designing a balanced diet of carbohydrates and protein to achieve the desired results in improving athlete performance and supporting healthy weight loss. This study provides a deep understanding of the importance of carbohydrate intake in supporting the performance and health of female long-distance runners, and emphasizes the need for more inclusive research to develop better nutritional interventions.

Cranberry supplementation improves physiological markers of performance in trained runners.

Cranberries have the highest polyphenol and antioxidant capacity among fruits and vegetables and may protect against exercise-induced free radical production, consequently improving performance. This study aimed to investigate the effect of polyphenol-rich cranberry extract (CE) on time-trial performance and lactate response following exercise. A total of 14 trained runners were tested at i) baseline, ii) 2 h following an acute CE dose (0.7 g/kg of body mass), and iii) 4 weeks after daily supplement consumption (0.3 g/kg of body mass). At each time point, runners performed a 1500-m race followed by a 400-m race where the live vastus lateralis oxygenation changes were determined by near-infrared spectroscopy and blood lactate was measured at rest and 1 and 3 min after each trial. The Shapiro-Wilk test and repeated-measures analysis of variance were used to establish significance (P &lt;0.05). Cranberry supplementation over 28 d improved aerobic performance during the 1500-m time trial, whereas the acute dose had no effect. More specifically, muscle reoxygenation rates were significantly faster after 28 d compared to baseline (P = 0.04; η² = 0.29), and a trend towards slower deoxygenation rate was observed (P = 0.13; η² = 0.20). Chronic CE consumption also buffered the post-exercise lactate response for the 400-m race (P = 0.01; η² = 0.27), while no effects were seen for the longer race. Our results suggest that cranberry supplementation may have ergogenic effects, as it improves physiological markers of performance during short- and long-distance running.

The Relationship between Personality Traits and Effectiveness of Ethiopian Athletes in Long Distance Running

The Relationship between Personality Traits and Effectiveness of Ethiopian Athletes in Long Distance Running

Effects of Puberty Blocker Treatment on Voluntary Wheel Running Activity in Young Rats

Background: Barriers to physical activity in transgender youth often center on social and psychological factors, but the effects of puberty blocking treatment that some youth receive on physical activity have yet to be explored. This study investigated the effects of puberty blocking treatment on physical activity in young female and male rats. Methods: Four week old female (F, n=19) and male rats (M, n=19) received the gonadotropin releasing hormone agonist (GnRHa) triptorelin as a puberty blocker (F-PB, n=10; M-PB, n=10) or saline as a control (F-CON, n=9; M-CON, n=9) for 4 weeks. Animals were then housed in voluntary wheel running (VWR) cages and activity was recorded during treatment period. Results: Main drug (p&lt;0.0001) and sex (p=0.045) effects with a significant drug x sex interaction (p=0.0095) was observed with total 4 week running distance with F-PB having a lower VWR activity than F-CON (240 ± 23 km vs 67 ± 9 km, respectively, p&lt;0.0001) and M-PB having lower VWR activity than M-CON (165 ± 15 km vs. 77 ± 14 km, respectively, p&lt;0.001). Significant differences in daily wheel running distance were first detected on day 5 for F-PB when compared to F-CON (p=0.036) and on day 11 for M-PB when compared to M-CON (p=0.034). Conclusions: Treatment with a GnRHa reduced voluntary running wheel activity in young female and male rats. Social and psychological factors are important variables impacting physical activity in transgender youth, but puberty blocker treatment may be an additional factor to consider when addressing physical activity.

Retracted: Real-Time Collection of Training Distance of Long-Distance Runners Based on Wireless Sensor Network

Retracted: Real-Time Collection of Training Distance of Long-Distance Runners Based on Wireless Sensor Network