Journal of Strength and Conditioning Research最新文献

{"title":"The Effects of Percentage-Based, Rating of Perceived Exertion, Repetitions in Reserve, and Velocity-Based Training on Performance and Fatigue Responses.","authors":"Nicholas Cowley, Vaughan Nicholson, Ryan Timmins, Gabriella Munteanu, Tandia Wood, Amador García-Ramos, Cameron Owen, Jonathon Weakley","doi":"10.1519/JSC.0000000000005026","DOIUrl":"10.1519/JSC.0000000000005026","url":null,"abstract":"<p><strong>Abstract: </strong>Cowley, N, Nicholson, V, Timmins, R, Munteanu, G, Wood, T, García-Ramos, A, Owen, C, and Weakley, J. The effects of percentage-based, rating of perceived exertion, repetitions in reserve, and velocity-based training on performance and fatigue responses. J Strength Cond Res 39(4): e516-e529, 2025-This study assessed the effects of percentage-based training (%1RM), rating of perceived exertion (RPE), repetitions in reserve (RIR), and velocity-based training (VBT) on (a) acute kinematic outputs, perceptions of effort, and changes in neuromuscular function during resistance training; and (b) neuromuscular fatigue and perceptions of soreness 24 hours after exercise. In a randomized crossover design, 15 subjects completed a %1RM, RPE, RIR, and VBT training condition involving a fatiguing protocol followed by 5 sets of the free-weight back squat and bench press at 70% of 1 repetition maximum. Subjects returned at 24 hours to assess neuromuscular fatigue and perceived soreness. Percentage-based training and RPE allowed the smallest volume loads, with %1RM prescription causing sets to be regularly taken to failure. Alternatively, RIR and VBT allowed greater maintenance of training volume. Velocity-based training had the most accurate training prescription, with all sets being within 5% of the intended starting velocity, while the RPE and %1RM prescriptive methods caused subjects to train with loads that were increasingly inaccurate. The RPE prescriptive method had the lowest reported values for differential RPE while the %1RM had the greatest change across the session. At no point were there between-group differences in measures of neuromuscular fatigue or perceived soreness. These findings demonstrate that autoregulatory prescriptive methods can be used to mitigate the risk of training to failure, ensure accurate training prescription that can maintain training volume, and enhance within-training kinematic outputs without altering neuromuscular fatigue or perceptions of soreness.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e516-e529"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950504","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":"An Efficient and Accurate Approach for Estimating the Free-Weight Back Squat 1-Repetition Maximum Based on the 2-Point Method and Optimal Minimal Velocity Threshold.","authors":"Zongwei Chen, Fengping Xiao, Yaxu Mao, Xiuli Zhang, Amador García-Ramos","doi":"10.1519/JSC.0000000000005040","DOIUrl":"10.1519/JSC.0000000000005040","url":null,"abstract":"<p><strong>Abstract: </strong>Chen, Z, Xiao, F, Mao, Y, Zhang, X, and García-Ramos, A. An efficient and accurate approach for estimating the free-weight back squat 1-repetition maximum based on the 2-point method and optimal minimal velocity threshold. J Strength Cond Res 39(4): e530-e537, 2025-This study aimed to compare the accuracy of nine 1-repetition maximum (1RM) estimation methods based on velocity recordings during the free-weight back squat. In a counterbalanced order, 39 resistance-trained male subjects performed 2 sessions against 6 loads (∼40, 50, 60, 70, 80, and 90% of 1RM) and 2 sessions against only 2 loads (∼40 and 90% of 1RM) followed by the actual 1RM attempts. The first session of each procedure was used for obtaining minimal velocity thresholds (MVTs) and the second session was used for 1RM estimation. Predicted 1RMs were calculated by entering 3 MVTs (i.e., actual MVT [i.e., the MVT associated with the actual 1RM], general MVT [i.e., 0.30 m·second -1 ], and optimal MVT [i.e., the MVT that minimizes the differences between the actual and predicted 1RMs]) into 3 load-velocity relationship (LVR) regression equations (multiple-point [i.e., using data of 6 loads from the multiple-point test], extracted 2-point [i.e., using data of the lightest and heaviest loads from the multiple-point test], and 2-point [i.e., using data of 2 loads from the 2-point test]). Alpha was set at 0.05. The main findings revealed that only the 1RMs predicted by the optimal MVT showed acceptable accuracy (raw errors ≤0.8 kg, absolute errors ≤4.0%) compared with the actual 1RM. The analysis of variance failed to reveal a significant main effect of the \"type of LVR model\" ( p = 0.079). Therefore, we recommend using the 2-point method combined with the optimal MVT to obtain an efficient and accurate 1RM estimation during the free-weight back squat.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e530-e537"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869433","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":"Wellness and Session Rating of Perceived Exertion in Professional Basketball Players Within Different Weekly Contexts.","authors":"Roberto Molina, Daniel Lapresa, Javier Arana, Ildefonso Álvarez, Hugo Salazar","doi":"10.1519/JSC.0000000000005023","DOIUrl":"10.1519/JSC.0000000000005023","url":null,"abstract":"<p><strong>Abstract: </strong>Molina, R, Lapresa, D, Arana, J, Álvarez, I, and Salazar, H. Wellness and session rating of perceived exertion in professional basketball players within different weekly contexts. J Strength Cond Res 39(4): e546-e551, 2025-The objective of this article was to analyze the level of well-being-through the wellness questionnaire-and the training load-based on the session rating of perceived exertion (sRPE)-in professional basketball players within different weekly contexts during the season 2020/2021. The team analyzed played 2 competitions: Endesa League (Asociación de Clubes de Baloncesto)-the highest level of competition in Spain-and the Basketball Champions League at the European level. Non-parametric statistics have been used because of the size of the sample and the ordinal nature of the scores. The contrast of related groups has not been significant for the wellness variable, remaining stable scores throughout different weekly contexts (weeks without competition, regular weeks with 1 game, and congested weeks with 2 or more games). Regarding the training load results, a significant effect size has been found in the contrast of medians depending on the proximity to the game in regular weeks and congested weeks, while in weeks without competition, moments of load alternation have been detected. This work is an example of the practical application of the wellness-sRPE relationship as an effective indicator within the week periodization.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e546-e551"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864716","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":"Estimation of Whole-Body Bone Mineral Density Through Air Displacement Plethysmography in a Large Sample of Elite Athletes.","authors":"Meghan K Magee, Jennifer B Fields, Andrew Jagim, Brittanie Lockard, Angela Miller, Debra Stroiney, Margaret T Jones","doi":"10.1519/JSC.0000000000005024","DOIUrl":"10.1519/JSC.0000000000005024","url":null,"abstract":"<p><strong>Abstract: </strong>Magee, MK, Fields, JB, Jagim, A, Lockard, B, Miller, A, Stroiney, D, and Jones, MT. Estimation of whole-body bone mineral density through air displacement plethysmography in a large sample of elite athletes. J Strength Cond Res 39(4): 427-432, 2025-Dual-energy x-ray absorptiometry (DXA) is used to determine bone mineral density (BMD) and body composition. Regulations and cost may limit DXA's utility in some athletic settings. Air displacement plethysmography (ADP), while able to measure body composition, does not measure BMD. The purpose was to evaluate the influence of body composition parameters obtained from ADP on BMD. Collegiate athletes (males, n = 153; females, n = 208) underwent ADP and DXA assessments. For ADP testing, the Brozek equation was used to estimate body fat percent (BF%) and fat-free mass (FFM) from body density. Dual-energy x-ray absorptiometry tests were completed to obtain BMD using the whole-body scan mode. Stepwise regression was conducted using age, body mass, height, sex, race, FFM (ADP), BF% (ADP), and sport type as independent variables. Total BMD (DXA) was the dependent variable. Accuracy and precision of the final equation were evaluated through Bland-Altman and linear regression. The final regression equation yielded an R2 of 0.691 with race, mass, BF%, age, and sport type as significant predictors ( p < 0.05) of BMD. Bland-Altman and linear regression showed systematic {95% confidence interval [CI] (-0.619 to -0.360)} and proportional bias (95% CI [0.173-0.374]). Although an ADP-derived regression equation may not provide a precise prediction of BMD, it may be useful to establish risk for low BMD if DXA is unavailable. Dual-energy x-ray absorptiometry may not be feasible for some athletic programs; therefore, an estimation equation for BMD derived from ADP values is advantageous for practitioners. This equation may assist in screening athletes for risk of low BMD.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"427-432"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142729693","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":"Differences in Anthropometric Parameters, Physical Fitness, and Kicking Speed in Young Football Players According to Performance Level, Playing Position, and Relative Age Effect: A Population-Based Study.","authors":"Hjalti R Oddsson, Katrín Ý Friðgeirsdóttir, Lára Hafliðadóttir, Ingi Þ Einarsson, Hafrún Kristjánsdóttir, Jose M Saavedra","doi":"10.1519/JSC.0000000000005041","DOIUrl":"10.1519/JSC.0000000000005041","url":null,"abstract":"<p><strong>Abstract: </strong>Oddsson, HR, Friðgeirsdóttir, KÝ, Hafliðadóttir, L, Einarsson, IÞ, Kristjánsdóttir, H, and Saavedra, JM. Differences in anthropometric parameters, physical fitness, and kicking speed in young football players according to performance level, playing position, and relative age effect: a population-based study. J Strength Cond Res 39(4): e561-e568, 2025-The objectives of this study were to determine (a) the differences, both in male and female players, in anthropometric parameters, physical fitness, and kicking speed based on the players' level and position on the field; (b) whether there is a relative age effect based on the players' level, and (c) whether there is a relationship between the relative age effect and the anthropometric parameters, physical fitness, and kicking speed parameters. Eight hundred twenty-six football players (15.76 ± 2.60 year old, 75.7% male) participated in the study. Players were grouped into elite and nonelite, as well as based on their field position and birth quartile. Nonparametric tests were used to study differences by level and by position or trimesters. Chi-square goodness of fit analysis was performed to know the association between elite and nonelite players regarding the relative age effect. Physical fitness parameters and kicking speed were higher in elite players than in nonelite players (5.834 ≥ χ2 ≤ 48.079; p < 0.001). There were differences in anthropometric and physical fitness parameters and kicking speed depending on the player's position: goalkeeper vs. outfield players (7.648 ≥ χ2 ≤ 26.078; p < 0.001) except in jump tests. There was a relative age effect in elite male players ( χ2 = 26.313; p < 0.001) but not in female players, and it was related to anthropometric and physical fitness parameters. This population-based study offers insights into the variables that differentiate elite from nonelite players at young ages, with differences in the relative age effect between male and female players, which can be used by coaches to identify key performance variables.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e561-e568"},"PeriodicalIF":2.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142877173","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":"Biceps Femoris EMG Activity During Incline Treadmill Running and Nordic Hamstring Task.","authors":"Turan A Akyürek, Hayri Ertan, Abdulkerim Darendeli","doi":"10.1519/JSC.0000000000005049","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005049","url":null,"abstract":"<p><strong>Abstract: </strong>Akyürek, TA, Ertan, H, and Darendeli, A. biceps femoris EMG activity during incline treadmill running and nordic hamstring task. J Strength Cond Res XX(X): 000-000, 2024-Although the Nordic hamstring exercise (NHE) is an effective method for strengthening the knee flexors, untrained individuals or intermediate level athletes may have difficulty performing it. In this study, we propose incline treadmill running as an alternative knee flexor exercise. The aim of this study was to compare the biceps femoris (BF) muscle activity (electromyography, EMG) levels between NHE and 10% grade treadmill running at 3 speeds. Nineteen recreationally active men were recruited for the study. Maximum voluntary contraction (MVC) with the knee flexors were completed. Nordic hamstring exercise and 10% grade treadmill running tasks were performed in a randomized counterbalanced order. Biceps femoris EMG activity was recorded during the measurements. Statistical significance was set to p < 0.05. We found that the peak EMG amplitude for BF was higher during the NHE (∼63% MVC) than during treadmill running at a 10% grade across low-to-moderate speeds. Increasing the running speed from 3.61 m·s-1 to 4.16 m·s-1 (∼49% MVC) raised the peak EMG amplitude by approximately 10% MVC. In addition, the variability in EMG amplitude for BF was greater during 10% grade treadmill running than during NHE. Although the peak EMG activity was greater during the NH task, it reached comparable levels when performing 10% grade treadmill running at a moderate running speed. Our results suggest that incline treadmill running can be an alternative knee flexor exercise that can be individualized by adjusting treadmill grade and speed, particularly for untrained individuals.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605297","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":"Iron Supplementation After Blood Donation Expedites Hematological Recovery but Does Not Influence Exercise Performance.","authors":"Tyler B Judd, Keely A Shaw, Joel R Krentz, Philip D Chilibeck","doi":"10.1519/JSC.0000000000005082","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005082","url":null,"abstract":"<p><strong>Abstract: </strong>Judd, TB, Shaw, KA, Krentz, JR, and Chilibeck, PD. Iron supplementation after blood donation expedites hematological recovery but does not influence exercise performance. J Strength Cond Res XX(X): 000-000, 2024-While the impact of blood donation on hemoglobin and exercise performance and the timeline for recovery is well studied, the role of iron supplementation in expediting recovery of performance is unknown. The objective of this research was to assess the effectiveness of oral iron supplementation in enhancing recovery of hemoglobin, hematocrit, and exercise performance after blood donation. Hemoglobin, hematocrit, and 5-km time trial performance were assessed in 10 moderately active subjects (6 men, 4 women; age = 34.0 ± 7.6 years, body mass = 74.4 ± 12.5 kg, V̇o2peak = 50.5 ± 6.0 ml·kg-1·min-1) before blood donation, the day after, and at weekly intervals for 5 weeks after donation. Before donation, individuals were stratified by sex and randomly assigned to supplement with 60 mg of elemental iron (3 men, 2 women) or placebo (3 men, 2 women) for 5 weeks. Significance was as accepted at p < 0.05. Time trial performance was decreased the day after donation by 6.7% (p < 0.001) and returned to baseline levels by 1 week after blood donation with no difference between groups. Hemoglobin concentration decreased by 1.6 g·dl-1 after blood donation (p < 0.01) with no difference between groups and failed to return to baseline after 5 weeks in either group. Hematocrit decreased by 4.0 and 3.1% in the iron and placebo groups, respectively, the day after donation compared with baseline (p < 0.001). By week 4, hematocrit in the iron group was no longer different from baseline (p = 1.0) but did not return to baseline values by week 5 in those supplementing with placebo (p < 0.05). Iron supplementation may enhance hematological recovery after blood donation but does not influence recovery of endurance performance.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605296","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":"Physical Working Capacity at Pain Intensity Threshold in Females.","authors":"Danielle A Sterner, Jeffrey R Stout, Brandi B Antonio, Abigail W Anderson, Ethan C Hill, David H Fukuda","doi":"10.1519/JSC.0000000000005059","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005059","url":null,"abstract":"","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605313","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 Influence of Maturity Status on the Development of Neuromuscular Performance in the Lower Body After One Season in Adolescent Tennis Players.","authors":"Ernest Baiget, Jose Canós-Portalés, Rafael Martínez-Gallego, Francisco Corbi, Jaime Fernandez-Fernandez","doi":"10.1519/JSC.0000000000005044","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005044","url":null,"abstract":"<p><strong>Abstract: </strong>Baiget, E, Canós-Portalés, J, Martínez-Gallego, R, Corbi, F, and Fernandez-Fernandez, J. The influence of maturity status on the development of neuromuscular performance in the lower body after 1 season in adolescent tennis players. J Strength Cond Res XX(X): 000-000, 2024-The purpose of the study was to determine the effects of biologic maturation on lower body neuromuscular performance over the course of a competitive tennis season in young tennis players. Eighty junior male and female tennis players were divided into Pre-Peak Height Velocity (PHV) (n = 36), Circa-PHV (n = 25), and Post-PHV (n = 19). Players were tested in 2 occasions, separated by 12 months, including speed (5, 10, and 20 m linear sprint), change of direction (CoD), and bilateral/unilateral countermovement jump (CMJ). Group-by-time interactions were found in biometric and maturational parameters (p = 0.031 to <0.001). All maturational groups increased their height and body mass (BM) (p < 0.01 to 0.001), while only Circa- and Post-PHV groups increased their BM index (p < 0.001 and 0.007). Within-group improvements from pre-to post-test were found in bilateral (p = 0.002 to 0.006) and dominant unilateral (p < 0.001 to 0.032) CMJ in all groups, while 10-m (p = 0.027) linear sprint and dominant and nondominant CoD only improved in the Post-PHV group (p = 0.03 to 0.008). No group-by-time interactions were found in any neuromuscular measure. In conclusion, maturation status did not significantly affect the neuromuscular performance improvement over a season in neuromuscular parameters of adolescent tennis players, suggesting that it is not only important to establish the maturation stage when working with these athletes, but also the need of including specific training based on biologic maturation status.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605318","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 Physical Training and Injury Incidence Following the Introduction of a New Military Fitness Test.","authors":"Regis C Pearson, Tyson Grier, Timothy Benedict, Olivia Mahlmann, Michelle Canham-Chervak","doi":"10.1519/JSC.0000000000005063","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005063","url":null,"abstract":"<p><strong>Abstract: </strong>Pearson, RC, Grier, T, Benedict, T, Mahlmann, O, and Canham-Chervak, M. Changes in physical training and injury incidence following the introduction of a new military fitness test. J Strength Cond Res XX(X): 000-000, 2024-Physical training (PT) and injury incidence may be affected by the implementation of a new physical fitness test. Current investigation measured changes in PT and injury incidence following field testing of the Army Combat Fitness Test (ACFT). Sixty-one battalions were administered electronic surveys before and after ACFT field testing from October 2018 through June 2020. Surveys collected demographics, injury incidence, and PT within the previous 12 months. Army Combat Fitness Test records were obtained from the Digital Training Management System. Statistical significance was accepted at p ≤ 0.05. One thousand one hundred thirty-four soldiers completed both surveys. Male soldiers represented 77% (31.3 ± 8.6 years, 21.3 ± 4.3 kg·m-2) and female soldiers represented 23% (30.0 ± 7.8 years, 24.1 ± 3.1 kg·m-2) of respondents. Male soldiers reported lower unit calisthenics training, higher unit resistance training, and higher unit total exercise following field testing (minutes per week, p < 0.05). Male soldiers reported higher personal running, higher personal resistance training, lower personal obstacle course training, and lower personal total exercise after field testing (minutes per week, p < 0.05). Female soldiers reported lower unit running, higher unit resistance training, higher personal resistance training, lower personal obstacle course training, and lower personal total exercise after field testing (minutes per week, p < 0.05). After field testing, male soldiers reported a greater number of lower back injuries (+2.9%, p = 0.01) and a greater number of resistance training injuries (+1.7%, p < 0.01). Changes in specific training modalities may lead to changes in activities associated with injury. Proper technique, periodization, individualization, and recovery education are recommended to control injury incidence when a new PT program is implemented.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605356","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}