Journal of Strength and Conditioning Research最新文献

{"title":"Comparing the Resistance Training Stimuli Using Velocity Feedback or Perceived Exertion in Bench Press.","authors":"Fernando Naclerio, Eneko Larumbe-Zabala, Mark Chapman, Pablo González-Frutos, N Travis Triplett","doi":"10.1519/JSC.0000000000005015","DOIUrl":"10.1519/JSC.0000000000005015","url":null,"abstract":"<p><strong>Abstract: </strong>Naclerio, F, Larumbe-Zabala, E, Chapman, M, Gonzales-Frutos, P, and Triplett, NT. Comparing the resistance training stimuli using velocity feedback or perceived exertion in bench press. J Strength Cond Res 39(4): 399-406, 2025-We compared the velocity feedback method (VEL) vs. the perceptual response (RPE), with no velocity feedback, to estimate changes in movement velocity during continuous sets terminated at 10, 20, and 40% of velocity decreases in the bench press exercise using either 50% or 75% of the 1 repetition maximum (1RM). After 5 sessions of familiarization and determining the 1RM, 19 males (24.5 ± 6 years) and 9 females (30.4 ± 8 years) underwent 2 identical 6-day testing sessions over 2 weeks (12 days in total) using the VEL (first 6 sessions) or the RPE method (last 6 sessions). The average velocity and the OMNI Perceived Exertion Scale for Resistance Exercise (OMNI-RES) (0-10) scale score were measured for every repetition of each set. Under VEL, the sets terminated after completing 2 consecutive repetitions below the pre-established velocity threshold. During RPE, the sets stopped when the subjects reached a previously obtained OMNI-RES score linked to the specific tested velocity thresholds. A linear mixed-effects model setting velocity thresholds, method, and their interaction as fixed effects and subjects as random components was conducted. No differences (p > 0.05) between methods were observed for the absolute (m·s-1) and percentage of velocity decreases or the total number of repetitions using both 50 and 75% of 1RM. Nonetheless, compared with VEL, fewer repetitions (p < 0.01) linked to nondesirable neuromuscular adaptations were completed under RPE. In conclusion, although no differences between methods for estimating changes in velocity were identified, the RPE could be preferable to the VEL method to reduce the number of repetitions performed under the prescribed threshold.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"39 4","pages":"399-406"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Strength Training on Endurance Performance Determinants in Middle- and Long-Distance Endurance Athletes: An Umbrella Review of Systematic Reviews and Meta-Analysis.","authors":"Domingo J Ramos-Campo, Luis Andreu-Caravaca, Vicente J Clemente-Suárez, Jacobo Á Rubio-Arias","doi":"10.1519/JSC.0000000000005056","DOIUrl":"10.1519/JSC.0000000000005056","url":null,"abstract":"<p><strong>Abstract: </strong>Ramos-Campo, DJ, Andreu Caravaca, L, Clemente-Suárez, VJ, and Rubio-Arias, JÁ. The effect of strength training on endurance performance determinants in middle- and long-distance endurance athletes: An umbrella review of systematic reviews and meta-analysis. J Strength Cond Res 39(4): 492-506, 2025-Strength training is used to enhance endurance performance in middle- and long-distance endurance athletes. However, likely due to heterogeneity and the variety of training methodologies used, not all studies have found improvements in endurance performance with the incorporation of strength training. We aimed to review the available systematic reviews and meta-analytical evidence examining the effects of strength training on endurance performance factors in endurance-trained athletes. An umbrella review was conducted. Strength training programs were categorized into (a) maximal-strength training (>80% 1-Repetition Maximum [1RM]), (b) explosive-strength training (<80% 1RM), and (c) reactive-strength training (plyometric training). Male and/or female middle-to long-distance endurance-trained athletes were included. Variables analyzed were maximum oxygen uptake (V̇o2max), endurance performance, maximal aerobic speed or power, work and running economy, energy cost, and aerobic and anaerobic lactate thresholds. Seventeen systematic reviews were included in this umbrella review (12 with meta-analyses). Moderate to large effects were observed in all studies for running economy. Four meta-analyses examined the impact of strength training on V̇o2max, and none observed significant changes. Regarding endurance performance, 3 studies analyzed the impact of plyometric training and found small effects, except for 1 study, which found a large effect when compared with a control group. The risk-of-bias assessment revealed that most studies had low or critically low confidence levels, with issues in comprehensive literature searches, exclusion justifications, and handling publication bias. This umbrella review reveals that strength training improves endurance performance and running economy and helps maintain V̇o2max in middle- and long-distance endurance athletes. The review supports the general benefits of integrating strength training into endurance training programs.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"39 4","pages":"492-506"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Congested Match Schedules on Countermovement Jump Metrics in Elite Volleyball Players.","authors":"André Rebelo, Irineu Loturco, João Rafael Pereira, Diogo Vicente Martinho, João Valente-Dos-Santos, Gert Vande Broek","doi":"10.1519/JSC.0000000000005031","DOIUrl":"10.1519/JSC.0000000000005031","url":null,"abstract":"<p><strong>Abstract: </strong>Rebelo, A, Loturco, I, Pereira, JR, Martinho, DV, Valente-dos-Santos, J, and Broek, GV. Impact of congested match schedules on countermovement jump metrics in elite volleyball players. J Strength Cond Res 39(4): e552-e560, 2025-The aim of this study was to assess the impact of a congested match schedule on various countermovement jump (CMJ) metrics recorded across the braking, transfer, propulsive, and flight phases of the CMJ. Fourteen male elite volleyball players were monitored across 7 microcycles, with CMJ assessments conducted at 14 time points using portable force plates. Repeated measures analysis of variance with Bonferroni post hoc tests and coefficient of variation (CV) analysis were used to analyze the data. The CVs for all metrics indicated a moderate variability between microcycles and low variability between the beginning and end of the weeks. Significant variability was observed in key performance metrics, including peak propulsive power ( p < 0.001, partial eta squared [η p2 ] = 0.336), peak propulsive velocity ( p = 0.005, η p2 = 0.207), propulsive phase duration ( p = 0.008, η p2 = 0.197), and jump momentum ( p = 0.019, η p2 = 0.225), across microcycles. These findings indicate that these CMJ metrics may be used as sensitive indicators of fatigue and performance changes during intense training and competitive periods. The total score of athleticism, calculated by averaging a set of standardized scores from multiple tests or repeated measures of the same test, for the propulsive and flight phases, proved to be particularly useful in providing a comprehensive view of the neuromuscular status. This emphasizes the importance of recording and analyzing a range of CMJ metrics to optimize training and recovery strategies in elite volleyball players.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e552-e560"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Individual Monitoring of the Countermovement Rebound Jump in Division I Female Basketball Players Across a Competitive Season: Using the Model Statistic and Coefficient of Variation Approach.","authors":"Jamie J Ghigiarelli, Dominick V Saldutti, Ofra A Pottorf, Katie M Sell, Adam M Gonzalez","doi":"10.1519/JSC.0000000000005043","DOIUrl":"10.1519/JSC.0000000000005043","url":null,"abstract":"<p><strong>Abstract: </strong>Ghigiarelli, JJ, Saldutti, DV, Pottorf, OA, Sell, KM, and Gonzalez, AM. Individual monitoring of the countermovement rebound jump in Division I female basketball players across a competitive season: Using the model statistic and coefficient of variation approach. J Strength Cond Res 39(4): 433-446, 2025-This study monitored neuromuscular fatigue using the countermovement rebound jump (CMRJ) test in 13 Division I female basketball players during a competitive season. The players were tested twice a week by performing 3 sets of 2 jumps on a force plate. Thirteen CMRJ metrics were analyzed across 20 sessions. A combined model statistic and coefficient of variation analysis enabled the use of a single-subject repeated-measures design to detect individual player decrements (fatigue) between testing days and baseline measures. Two-way repeated-measures analysis of covariance between high- and low-minute players was used to analyze CMRJ metrics. Except for a simple main effect of the modified reactive strength index for high-minute players, no other significant main effects were reported for the group, time, or interaction for the remaining CMRJ metrics. The analysis yielded 819 individual fatigues, with the highest percentages of fatigue for the countermovement jump (CMJ) jump height (JH) (12.3%) and CMJ average braking power (12.3%). For the rebound jump, JH exhibited the highest percentage of fatigue (9.9%). Although the results of the team analysis were not significantly different, a select few players contributed to a higher percentage of fatigue, justifying the importance of inspecting the data by individuals in addition to team averages.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"39 4","pages":"433-446"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mobile Anthropometry in Division I Baseball Athletes: Evaluation of an Existing Application and the Development of New Equations.","authors":"Hunter Haynes, Grant M Tinsley, Sydney H Swafford, Abby T Compton, Juliana Moore, Paul T Donahue, Austin J Graybeal","doi":"10.1519/JSC.0000000000005039","DOIUrl":"10.1519/JSC.0000000000005039","url":null,"abstract":"<p><strong>Abstract: </strong>Haynes, H, Tinsley, GM, Swafford, SH, Compton, AT, Moore, J, Donahue, PT, and Graybeal, AJ. Mobile anthropometry in Division I baseball athletes: evaluation of an existing application and the development of new equations. J Strength Cond Res 39(4): 447-456, 2025-The purpose of this study was to evaluate the agreement between mobile application and dual-energy x-ray absorptiometry (DXA)-derived body composition parameters in a group of Division I (DI) collegiate baseball athletes and to develop new equations for this population using this mobile technique. A total of 41 (age: 20.5 ± 1.5 years; DXA %fat: 18.9 ± 4.6%) DI collegiate baseball athletes underwent body composition assessments using DXA and a mobile anthropometric application. Total and appendicular body composition estimates were produced from this mobile application using previously developed equations and evaluated against the reference (DXA) in the complete sample of athletes. Least absolute shrinkage and selection operator regressions were then used to develop new equations using the mobile application in a portion of the athletes ( n = 34) and subsequently tested in the remaining athletes ( n = 7). In the complete sample, no body composition estimate using the mobile application's existing equations ( R2 : 0.00-0.68) demonstrated equivalence with DXA, including estimates of %fat ( R2 : 0.37; root-mean-squared error [RMSE]: 3.74%), fat mass (FM), and total (appendicular lean mass [ALM]) and leg lean mass ([ALM legs ] R2 : 0.67-0.68; RMSE: 3.43-4.86 kg). In the testing sample, estimates produced from the newly developed equations demonstrated acceptable performance when compared to DXA, most notably %fat ( R2 : 0.80; RMSE: 3.66%), FM, ALM, and ALM legs ( R2 : 0.55-0.87; RMSE: 0.74-3.46 kg). Previously developed equations using mobile anthropometrics may not demonstrate acceptable agreement with DXA in DI collegiate baseball athletes, and newly developed equations specific to this group may be more suitable. Those employing these newly developed equations should use caution until further external cross-validation is performed.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"447-456"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining the Determinants of Skating Speed in Ice Hockey Athletes: A Systematic Review.","authors":"Michael A Silvestri, Daniel J Cleather, Samuel Callaghan, John Perri, Hayley S Legg","doi":"10.1519/JSC.0000000000005054","DOIUrl":"10.1519/JSC.0000000000005054","url":null,"abstract":"<p><strong>Abstract: </strong>Silvestri, MA, Cleather, DJ, Callaghan, S, Perri, J, and Legg, HS. Examining the determinants of skating speed in ice hockey athletes: a systematic review. J Strength Cond Res 39(4): 507-514, 2025-Ice hockey is a physically demanding sport that requires athletes to maintain high skating speed for optimal performance. This systematic review examines existing research on testing ice hockey athletes in relation to skating speed and identifies key metrics to inform future decisions on the most suitable testing regimes. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed for the literature search. After the literature search and application of inclusion and exclusion criteria, 19 studies were deemed eligible. The identified measures that showed a significant correlation with ice skating performance were on-land sprinting, jumping, body composition, and anaerobic power. These findings highlight the multifactorial nature of skating performance and suggest that a range of tests may be necessary to identify critical factors to overall skating performance; however, further research is needed to confirm this hypothesis.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"39 4","pages":"507-514"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximum Isometric Hip Adduction Squeeze and Abduction Press Strength Values in Men's Rugby Union Players at Select Timepoints Throughout a Competitive Season.","authors":"Ciaran O' Connor, Martin Mc Intyre, Eamonn Delahunt, Kristian Thorborg","doi":"10.1519/JSC.0000000000005014","DOIUrl":"10.1519/JSC.0000000000005014","url":null,"abstract":"<p><strong>Abstract: </strong>O' Connor, C, Mc Intyre, M, Delahunt, E, and Thorborg, K. Maximum isometric hip adduction squeeze and abduction press strength values in men's rugby union players at select timepoints throughout a competitive season. J Strength Cond Res 39(4): e569-e580, 2025-The purpose of this research was to report hip adduction and abduction strength values in men's rugby union players at select timepoints throughout a competitive season and to examine if differences exist between time of season and hip-testing positions. This cross-sectional repeated measures study design consisted of 15 male rugby union players competing at senior club level. Maximum isometric hip adduction and abduction strength were measured using a ForceFrame in 3 testing positions at specific timepoints: start of preseason (T1), start of competitive season (T2), mid-season period 1 (T3), and mid-season period 2 (T4). At group level, hip adduction strength (N·kg -1 ) increased from T1 to T2 in all testing positions, with significant increases observed in the 0° hip-flexion short-lever position ( p = 0.048), and 45° hip-flexion position ( p = 0.032). No significant changes occurred in hip abduction strength (N·kg -1 ). Hip adduction:abduction strength ratio increased from T1 to T2, with a significant increase observed in the 0° hip-flexion short-lever position ( p = 0.008). At individual level, large variations from baseline strength (N·kg -1 ) were observed between timepoints for hip adduction strength, abduction strength, and adduction:abduction strength ratio. In conclusion, the present study shows increases in hip adduction strength and hip adduction:abduction strength ratio from the start of preseason to the beginning of the competitive season, with no other significant changes in hip strength observed throughout the season. Individual and frequent hip strength monitoring throughout the season and a more individualized exercise prescription approach may be needed for rugby union players, in addition to a more generalized focus on improving adductor and abductor strength.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e569-e580"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142729808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Individual Acceleration-Speed Profile Variables: Comparison and Reliability Between Linear and Curvilinear Sprints.","authors":"Sergio Miras-Moreno, Amador García-Ramos, Matic Sašek, Oskar Cvjetičanin, Nejc Šarabon, Iztok Kavčič, Darjan Smajla","doi":"10.1519/JSC.0000000000005027","DOIUrl":"10.1519/JSC.0000000000005027","url":null,"abstract":"<p><strong>Abstract: </strong>Miras-Moreno, S, García-Ramos, A, Sašek, M, Cvjetičanin, O, Šarabon, N, Kavčič, I, and Smajla, D. Individual acceleration-speed profile variables: comparison and reliability between linear and curvilinear sprints. J Strength Cond Res 39(4): e538-e545, 2025-The aim of this study was to compare linear sprint (LS) and curvilinear sprint (CS) to provide (a) the goodness-of-fit of individual acceleration-speed profile (ASP) and (b) the magnitude and within- and between-session reliability of the ASP variables (A 0 [theoretical maximal acceleration], S 0 [theoretical maximal velocity], and AS slope [slope of the linear ASP]). Twenty-one sports science students performed 2 identical experimental sessions composed of 3 LS trials and 6 CS trials (3 for each testing side). The individual ASP was modeled considering only the fastest or combining the 3 trials of each sprint type. The individual ASP presented a very high goodness-of-fit for the 3 sprint types, but slightly higher for best (range r2 = 0.98 [0.75-1.00]) compared with combined trials (range r2 = 0.95 [0.84-0.99]). Linear sprints revealed higher S 0 (effect size [ES] ≥ -1.88; p < 0.001) and AS slope (ES ≥ -2.80; p < 0.001) but lower A 0 (ES ≥ 1.15; p < 0.001) compared with CS. The ASP variables generally showed an acceptable within-session absolute reliability (range coefficient of variation [CV] = 4.5% [2.4-6.9%]) but an overall poor relative reliability for AS slope (range intraclass correlation coefficient = 0.44 [0.24-0.69]). The between-session reliability was greater for the combined trials (range CV = 4.7% [1.9-8.6%]) compared with the best trial (range CV = 6.1% [2.9-8.7%]). This study opens the possibility of using the ASP to monitor CS, preferably by combining multiple trials to increase its between-session reliability.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e538-e545"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in Absolute and Relative Muscular Endurance After Resistance Training: A Review of the Literature With Considerations for Future Research.","authors":"William B Hammert, Yujiro Yamada, Ryo Kataoka, Jun Seob Song, Robert W Spitz, Vickie Wong, Aldo Seffrin, Jeremy P Loenneke","doi":"10.1519/JSC.0000000000005084","DOIUrl":"10.1519/JSC.0000000000005084","url":null,"abstract":"<p><strong>Abstract: </strong>Hammert, WB, Yamada, Y, Kataoka, R, Song, JS, Spitz, RW, Wong, V, Seffrin, A, and Loenneke, JP. Changes in absolute and relative muscular endurance after resistance training: A review of the literature with considerations for future research. J Strength Cond Res 39(4): 474-491, 2025-Changes in local muscular endurance can be examined using absolute muscular endurance tests (e.g., performing as many repetitions as possible at pre- and postintervention against the same external load) and/or relative muscular endurance tests (e.g., using a load that scales to the individual's current level of maximal strength). This article discusses and elaborates on recommendations for assessing changes in local muscular endurance, with a focus on absolute and relative muscular endurance testing methods. We conducted a systematic search of the literature, which yielded 7,473 total articles. Of those, 51 studies met the inclusion criteria: 40 indicated use of either an absolute (n = 17) or relative muscular endurance (n = 20) test, 3 of which used both, and 11 did not clearly indicate whether an absolute or relative test was used. The literature examined suggests that absolute muscular endurance is much more likely to increase after resistance training compared with relative muscular endurance. Among the training protocols that had the most robust effects on relative muscular endurance were those that used lower loads and/or a higher number of repetitions per set, which might be a consequence of the protocols producing lower magnitudes of strength increases. Another notable observation was the lack of clarification as to how changes in local muscular endurance were studied. We urge future work to ensure that experimental designs are conducted and described with sufficient clarity (i.e., report whether an absolute or relative muscular endurance test was used, and control for/report the repetition cadence used during testing).</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"39 4","pages":"474-491"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Countermovement Jumps and Acute to Chronic Workload Ratios in Low, Moderate, and High Jump Load Groups Throughout a Division I Volleyball Season.","authors":"Gabriel J Sanders, Stacie Skodinski, Damjana V Cabarkapa, Mason Howard, Dimitrije Cabarkapa, Roger O Kollock, Corey A Peacock","doi":"10.1519/JSC.0000000000005030","DOIUrl":"10.1519/JSC.0000000000005030","url":null,"abstract":"<p><strong>Abstract: </strong>Sanders, GJ, Skodinski, S, Cabarkapa, DV, Howard, M, Cabarkapa, D, Kollock, RO, and Peacock, CA. Countermovement jumps and acute to chronic workload ratios in low, moderate, and high jump load groups throughout a Division I volleyball season. J Strength Cond Res 39(4): 457-465, 2025-The purpose of the study was to evaluate the effects of low, moderate, and high jump loads on the acute to chronic workload ratio (ACWR) and neuromuscular fatigue throughout a Division I volleyball season. Twelve female volleyball athletes were monitored throughout a competitive season to track daily jump loads and measure neuromuscular fatigue based on twice-weekly countermovement jumps (CMJs) using a dual force plate. Jump loads were categorized into thirds (low, moderate, high-volume) to assess changes in neuromuscular fatigue, and a secondary evaluation examined differences in the ACWR. The results of this study were statistically significant with a p ≤ 0.05. The Wilks Lambda test in the multivariate analysis of variance found there were main effects for low, moderate, and high jump load groups ( F = 50.498, p < 0.001), weeks ( F = 3.136, p < 0.001), and significant group by week interactions ( F = 1.751, p < 0.001) for jump loads and CMJ test results. There was no main effect of week for ACWR ( F = 0.634, p = 0.849), and although statistically different, there were minimal changes in the ACWR between groups. There were significant variations in jump loads and CMJ performance between low, moderate, and high jump load groups across a 16-week season, most notably after week 5. In addition, the data highlight the limitations of the ACWR when detecting changes in athlete fatigue throughout the season.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"457-465"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}