Journal of Strength and Conditioning Research最新文献

{"title":"Postpractice Neuromuscular Performance Changes in 3 × 3 Professional Female Basketball Players.","authors":"Dimitrije Cabarkapa, Damjana V Cabarkapa, Amit Batra, Andrew C Fry","doi":"10.1519/JSC.0000000000005092","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005092","url":null,"abstract":"<p><strong>Abstract: </strong>Cabarkapa, D, Cabarkapa, DV, Batra, A, and Fry, AC. Postpractice neuromuscular performance changes in 3 × 3 professional female basketball players. J Strength Cond Res 39(5): e706-e710, 2025-The purpose of this investigation was to examine changes in lower body neuromuscular performance characteristics across multiple testing time points within a cohort of professional 3 × 3 female basketball players. Ten athletes volunteered to participate in this study (x̄ ± SD; age = 29.1 ± 4.3 years; height = 181.4 ± 7.0 cm; body mass = 77.4 ± 6.2 kg). Each athlete completed 3 countermovement vertical jumps while standing on a portable force plate system on 4 different occasions: before team practice, immediately postpractice, and the next morning and afternoon. Twenty-two force-time metrics were analyzed, 8 within braking and propulsive and 2 within landing phases of the jumping motion, including 4 performance metrics. Repeated measures analysis of variance was used to examine statistically significant differences (p < 0.05). The findings reveal an absence of significant changes in all force-time metrics of interest pre-post practice. However, a notable decrease in jump height (-5.8%), average and peak propulsive force (-4.3% and -4.7%), propulsive net impulse (-3.5%), average and peak propulsive power (-6.1% and -6.0%), and reactive strength index modified (-11.8%) was observed the following morning when compared with baseline measurements. The reactive strength index modified was shown to be the most sensitive metric in detecting fatigue-induced changes in athletes' performance, because it experienced the largest drop between these 2 testing time points (p = 0.011; g = 0.727). Also, the observed performance suppression disappeared by the afternoon training session because all of the aforementioned force-time metrics returned to the baseline levels, indicating that the athletes were adequately recovered to participate in team training activities.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"39 5","pages":"e706-e710"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144041484","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":"Identifying the Psyching-Up Strategies Used in Strength Sports: A Concept Mapping Approach.","authors":"Kurtis Cusimano, Paul Freeman, Jason Moran","doi":"10.1519/JSC.0000000000005057","DOIUrl":"10.1519/JSC.0000000000005057","url":null,"abstract":"<p><strong>Abstract: </strong>Cusimano, K, Freeman, P, and Moran, J. Identifying the psyching-up strategies used in strength sports: a concept mapping approach. J Strength Cond Res 39(5): 553-561, 2025-It has frequently been reported that strength athletes use psyching-up strategies to enhance performance. Despite numerous investigations into the efficacy of these psyching-up strategies, there has yet to be a thorough exploration of the methods used by athletes to do so. Thus, it is important to explore the full breadth of strategies used by athletes. This study aimed to identify the psyching-up strategies used by strength sport athletes and assess the perceived effectiveness on performance. Using a concept mapping approach, 246 strength sport athletes and coaches participated in an initial statement (technique) generation phase, and 112 sorted the techniques into clusters and rated the effectiveness of each technique at enhancing maximal strength performance. In the generation stage, 64 individual psyching-up techniques were identified. Similarity matrix generation, multidimensional scaling, and hierarchical cluster analysis were used to produce visual cluster maps, which identified 8 separate clusters of psyching-up strategies: \"pre-performance routines\"; \"positive thoughts, feelings, images, and behaviors\"; \"goals and performance accomplishments\"; \"self-deprecation\"; \"negative thoughts, feelings, images, and behaviors\"; \"stimulation\"; \"physical and physiological techniques\"; and \"aggressive acts\". Participants ranked \"pre-performance routines\" as being the most effective psyching-up strategy, with males reporting significantly higher ratings for \"self-deprecation\"; \"negative thoughts, feelings, images, and behaviors\"; \"stimulation\"; and \"aggressive acts\". The present findings demonstrated a greater breadth of psyching-up techniques than those currently examined within the literature. Accordingly, we suggest a revised definition of psyching-up strategies in the context of strength sports: \"strategies intending to alter activation or to enhance mental preparedness, immediately prior to or during skill execution\".</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"553-561"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143604948","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":"A 3-Minute Work Capacity Test Predicts Simulated Firefighting Performance.","authors":"Lasse Ten Siethoff, Henrik Petré, Alexander Ovendal, Johnny Nilsson, Manne Godhe, Peter Tedeholm, Torbjörn Helge, Eva A Andersson","doi":"10.1519/JSC.0000000000005068","DOIUrl":"10.1519/JSC.0000000000005068","url":null,"abstract":"<p><strong>Abstract: </strong>ten Siethoff, L, Petré, H, Ovendal, A, Nilsson, J, Godhe, M, Tedeholm, P, Helge, T, and Andersson, EA. A 3-minute work capacity test predicts simulated firefighting performance. J Strength Cond Res 39(5): e692-e700, 2025-The study aimed to identify a small set of fitness tests that could effectively predict performance in simulated firefighting tasks. Thirty-six (25 male and 11 female) firefighters participated in the study. Strength was evaluated with grip strength, barbell bench rows, and elevated trap bar deadlifts. Work capacity was assessed using a 3-minute pyramid test, executed with and without firefighting equipment. Firefighting performance was evaluated using a simulated work task course comprising stair climbing, hose pull, victim rescue, and equipment carry. We used backward linear regressions to derive models incorporating fitness test results, demographic variables, and oxygen uptake measures as predictors. Statistical significance was set to p < 0.05. The pyramid test without equipment accounted for 59% of the variance in task performance. When body mass and height were included, the model's predictive power increased to 71%. A final model, integrating the pyramid test, body mass, and absolute maximal oxygen uptake capacity (V̇ o2 max), explained 81% of performance variation. Our findings indicate that V̇ o2 max is the key factor in firefighter task performance, explaining 69% of the variance. The pyramid test, which estimates V̇ o2 max and predicted 59% of performance, is simple, time efficient, and can be conducted at stations to assess physical ability and work capacity. Incorporating the pyramid test into regular assessments can help firefighters focus on improving their work capacity, which is essential for achieving better performance.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e692-e700"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12017595/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143502125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sport-Specific Differences in Vertical Jump Force-Time Metrics Between Professional Female Volleyball, Basketball, and Handball Players.","authors":"Damjana V Cabarkapa, Dimitrije Cabarkapa, Jelena Aleksic, Andrew C Fry","doi":"10.1519/JSC.0000000000005060","DOIUrl":"10.1519/JSC.0000000000005060","url":null,"abstract":"<p><strong>Abstract: </strong>Cabarkapa, DV, Cabarkapa, D, Aleksic, J, and Fry, AC. Sport-specific differences in vertical jump force-time metrics between professional female volleyball, basketball, and handball players. J Strength Cond Res 39(5): 587-592, 2025-The purpose of the present study was to examine the sport-specific differences in countermovement vertical jump (CMJ) force-time metrics among professional female volleyball, basketball, and handball players. Ninety-four athletes volunteered to participate in the present study (i.e., 41 volleyball, 20 basketball, and 33 handball). After a brief warm-up procedure, each athlete performed 3 nonconsecutive CMJs while standing on a force plate system sampling at 1,000 Hz. Nineteen force-time metrics were selected for performance analysis purposes, including both eccentric and concentric phases of the jumping motion. A one-way analysis of variance with Tukey post-hoc comparisons was used to examine statistically significant differences in each dependent variable across 3 sports ( p < 0.05). The results reveal that volleyball athletes demonstrate significantly greater impulse, velocity, and mean and peak power during the eccentric phase of the CMJ compared with both basketball and handball players, and longer eccentric duration than basketball players. During the concentric phase, volleyball athletes showed significantly greater duration, impulse, and velocity compared to their handball and basketball counterparts, with higher mean and peak force observed only in comparison with basketball players. In addition, volleyball athletes had significantly greater jump height and deeper countermovement depth than the other 2 groups. However, the difference in reactive strength index-modified was detected only between the handball and volleyball athletes, with volleyball players exhibiting greater values. Overall, these findings can help sports practitioners with the development of specialized performance-enhancement training programs for athletes competing in sports such as basketball, volleyball, and handball.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"587-592"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605314","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":"Understanding the Context in Which Australian Footballers Sprint During Match-Play.","authors":"Ruby Guppy, Minh Huynh, Charlie Davids, Matthew C Varley","doi":"10.1519/JSC.0000000000005047","DOIUrl":"10.1519/JSC.0000000000005047","url":null,"abstract":"<p><strong>Abstract: </strong>Guppy, R, Huynh, M, Davids, C, and Varley, MC. Understanding the context in which Australian footballers sprint during match-play. J Strength Cond Res 39(5): e668-e675, 2025-The aim of this study was to identify and describe the context in which Australian footballers perform sprint efforts during match-play. A secondary aim was to identify if different contextual factors influenced sprint occurrence within each position. A total of 4,224 sprint efforts (≥7.0 m·s -1 ) were analyzed from 37 elite Australian football players during the 2019 competitive season (21 matches). Players performed a median of 9 sprints per game (range: 0 to 29), with the median sprint distance being 13.4 m (range: 3.5-94.3 m), a median duration of 1.7 seconds (range: 0.5-12.7 seconds), and a median maximal speed per sprint of 7.54 m·s -1 (range: 7.02-9.61 m·s -1 ). Sprint efforts were coded for the following contextual factors: phase of play, player possession, player action, and the start and end field location. Of all sprint efforts, 39.7 and 36.9% occurred during the defensive and offensive phases, respectively. Most sprints (90.6%) were performed without the player having possession of the ball. Forwards performed the greatest proportion of sprints to create space (25.4%), backs to man an opponent (23.1%), midfielders to follow play (17.4%), and rucks to be first to the ball with pressure (22.2%). The context in which Australian football players perform sprints during matches will differ based on their position. This information can be used to design specific sprint training drills. Practitioners can use the methods outlined in this study to analyze the contextual factors within their own club and adjust training programs accordingly.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"e668-e675"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605280","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":"Jump Squat Momentum: An Alternative Method to Prescribe Jump Squat Loads for Elite Rugby Union Players.","authors":"Irineu Loturco, Santiago Zabaloy, Chris Bishop, Valter P Mercer, Tulio B M A Moura, Mauricio S Ramos, Tomas T Freitas, Lucas A Pereira","doi":"10.1519/JSC.0000000000005123","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005123","url":null,"abstract":"<p><strong>Abstract: </strong>Loturco, I, Zabaloy, S, Bishop, C, Mercer, VP, Moura, TBMA, Ramos, MS, Freitas, TT, and Pereira, LA. Jump squat momentum: An alternative method to prescribe jump squat loads for elite rugby union players. J Strength Cond Res XX(X): 000-000, 2025-Rugby union is a team-sport in which collisions and impact forces play a decisive role. In this regard, momentum-based measurements (the product of mass and velocity of a body in a given movement) are frequently used by practitioners. Generally, sprint momentum (SM; the product of sprinting speed and athlete's body mass) is the most commonly considered momentum-based measure by coaches and sport scientists, either to differentiate playing positions or to examine player performance. However, recently, jump squat momentum (JSM) has been suggested as a complementary momentum-based measure because of its strong relationship with SM. In this study, we compared the body mass; half-squat 1 repetition maximum (HS 1RM), in both absolute and relative terms (i.e., relative strength [RS]); sprinting speed and momentum; and JSM of 21 rugby backs and forwards using an independent t test. As expected, forwards are significantly heavier and stronger and exhibit higher SM and JSM than backs (p ≤ 0.02). By contrast, backs are faster in linear sprints over both 10- and 30-m (p < 0.001) and exhibit higher values of RS (p < 0.05). Furthermore, irrespective of the playing position, RS was significantly different between the \"low\" and \"high\" RS groups (p < 0.001). Despite these marked differences, all players achieved their greatest magnitudes of JSM at an average of 40% HS 1RM. Strength and conditioning coaches interested in increasing JSM and its related metrics (e.g., SM) in rugby players could use this specific loading range to prescribe JS loads during their strength-power training sessions.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144016280","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":"Effects of Percussion Massage Therapy on Neuromuscular Recovery From Eccentric Exercise-Induced Muscle Damage.","authors":"Xin Ye, Cassandra Hale, Emma Brown, Emily Clausi, Joshua Hudak, Amber Marino, Taylor Mezanko","doi":"10.1519/JSC.0000000000005110","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005110","url":null,"abstract":"<p><strong>Abstract: </strong>Ye, X, Hale, C, Brown, E, Clausi, E, Hudak, J, Marino, A, and Mezanko, T. Effects of percussion massage therapy on neuromuscular recovery from eccentric exercise-induced muscle damage. J Strength Cond Res XX(X): 000-000, 2025-The aim of this study was to examine the effects of percussion massage intervention on neuromuscular function and performance recovery from eccentric exercise-induced muscle damage. Twenty healthy and physically active volunteers underwent an elbow flexion eccentric exercise protocol (6 sets of 10 repetitions with 80% of the concentric one-repetition maximum) with their nondominant arms. The indirect markers of muscle damage (muscle soreness, elbow flexion range of motion, upper arm circumference, elbow flexion isometric strength along with voluntary activation percentage, and resting twitch) were measured before, immediately, and 24, 48, and 168 hours after the eccentric exercise. The subjects were randomly assigned to either (a) percussion massage group (Percussion, n = 10): received 5 minutes of percussion massage treatment at the end of the eccentric exercise visit, the end of 24 hours, and the end of 48 hours after the exercise, or (b) control group (CON, n = 10): did not receive any treatment. Separate 2-way (time × group) mixed factorial analysis of variance tests were used to examine the potential changes of muscle damage indirect markers across time between groups. Significant main effects for time were observed in all dependent variables (p < 0.05); however, no interactions or group differences were found in any of these variables. Therefore, our study suggests that using percussion massage does not accelerate recovery after high-intensity muscle damaging eccentric exercise.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144026977","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 Demands and Muscle-Induced Damage in Women's Rugby Union World Cup Matches.","authors":"Sebastien Imbert, Julien Piscione, Helene Joncheray, Frederic N Daussin","doi":"10.1519/JSC.0000000000005106","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005106","url":null,"abstract":"<p><strong>Abstract: </strong>Imbert, S, Piscione, J, Joncheray, H, and Daussin, FN. Physical demands and muscle-induced damage in Women's Rugby Union World Cup matches. J Strength Cond Res XX(X): 000-000, 2025-Increasing professionalization of women's rugby union is leading to a continuous increase in the level of practice and physical performance. The study aimed to determine the physical demands of international matches during the World Cup, match-induced muscle damage, and the relationship between blood measurement and Global Positioning System (GPS) parameters and/or subjective questionnaires. A total of 26 women's rugby union players were monitored through GPS during 6 matches of the 2022 Rugby World Cup. Eleven GPS parameters were analyzed: playing time, total distance, walking percentage, maximal aerobic speed, activity percentage, number of accelerations and decelerations, high- and very high-intensity distance, sprint distance, and maximum speed. Maximal distance was determined using rolling windows of 30 seconds, 1 minute, and 2 minutes. Well-being questionnaires and blood creatine kinase (CK) were monitored 36 hours after a match. Outside backs run faster and cover greater distances at > 24 km·h-1 than other positions, and half backs cover the greatest total distance (p < 0,05) and accelerate more (p < 0,02) than other positions. Worst-case scenario (WCS) analysis also revealed that half backs run a greater distance than other positions (p < 0.05). Blood CK activity increased 4-fold 36 hours after a match. Global Positioning System data and subjective surveys do not reflect muscle damage but, on a larger scale, they are tools to study fatigue in international rugby players. The physical demands during a match are different depending on the position played, and WCS data are useful for preparing the players. Muscle damage could not be assessed with the noninvasive tools used here.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144015238","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":"Factors Influencing Change of Direction Performance in Youth Soccer Players: Velocity-Time Profile Analysis of the Pro-Agility Test.","authors":"Hayato Nakamura, Daichi Yamashita, Daichi Nishiumi, Naoto Nakaichi, Norikazu Hirose","doi":"10.1519/JSC.0000000000005116","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005116","url":null,"abstract":"<p><strong>Abstract: </strong>Nakamura, H, Yamashita, D, Nishiumi, D, Nakaichi, N, and Hirose, N. Factors influencing change of direction performance in youth soccer players: velocity-time profile analysis of the Pro-Agility test. J Strength Cond Res XX(X): 000-000, 2025-The purpose of this study was to assess factors influencing change of direction (COD) deficit (CODD) and total time completion (CODTT) in adolescent soccer players through velocity-time profile analysis of the Pro-Agility Test. We enrolled 71 junior high school male soccer players and measured the 20-m sprint time and CODTT of the Pro-Agility Test, calculating CODD by subtracting the 20-m sprint time from CODTT. In addition, 3-dimensional motion data were collected using a markerless motion capture system during the Pro-Agility Test. Each section (5 m in the first, 10 m in the second, and 5 m in the third) was divided into acceleration and deceleration phases based on center of mass (COM) velocity, which were further divided into early and late halves. The mean COM acceleration during the acceleration phase (Acc) and deceleration during the deceleration phase (Dec) were calculated. Stepwise multiple regression analysis was performed to identify phases affecting CODTT and CODD. Statistical significance was set at p < 0.05. Total time completion of a COD task was explained by the second early Acc (β = -0.500), second late Dec (β = 0.433), and 20-m sprint time (β = 0.226) (adjusted R2 = 0.858), whereas CODD was explained by the second late Dec (β = 0.561) and second early Acc (β = -0.271) (adjusted R2 = 0.459). Maturity offset significantly correlated with CODTT (r = -0.456) but not with CODD (r = -0.119). The results indicated that deceleration and reacceleration during the Pro-Agility Test can be evaluated in adolescents by combining CODTT and CODD.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144032216","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":"Effects of Daytime Floatation-Restricted Environmental Stimulation Therapy on Nocturnal Cardiovascular Physiology, Sleep, and Subjective Recovery in Collegiate Student-Athletes: A Comprehensive Observational Study.","authors":"Emaly Vatne, Justin J Merrigan, Jason D Stone, Catherine Saenz, William J Kraemer, Joshua A Hagen","doi":"10.1519/JSC.0000000000005131","DOIUrl":"https://doi.org/10.1519/JSC.0000000000005131","url":null,"abstract":"<p><strong>Abstract: </strong>Vatne, E, Merrigan, JJ, Stone, JD, Saenz, C, Kraemer, WJ, and Hagen, JA. Effects of daytime floatation-restricted environmental stimulation therapy on nocturnal cardiovascular physiology, sleep, and subjective recovery in collegiate student-athletes: A Comprehensive Observational Study. J Strength Cond Res XX(X): 000-000, 2025-The primary aim of this study was to explore the relationship between floatation-restricted environmental stimulation therapy (floatation-REST) and nocturnal cardiovascular physiology and sleep in collegiate athletes. The secondary aim was to describe the perceived changes in soreness, mood, fatigue, energy level, and overall experience after floatation-REST in collegiate athletes. Data included 214 records of nocturnal cardiovascular physiology and sleep collected using an acceptably valid and reliable wearable device (Ōura Ring, Ōura Health, Oulu, Finland) from 97 athletes (52.57% women) on 12 varsity teams, and 2,319 survey responses collected immediately after floatation-REST from 898 athletes (48.88% women) on 36 varsity teams. Nocturnal cardiovascular physiology was assessed through resting heart rate, heart rate variability, and respiration rate, while sleep was summarized using total sleep time, time in bed, and sleep efficiency. The representation of teams was varied, with football and men's and women's swimming heavily represented. Male and female athletes were analyzed separately to prevent overlooking sex-specific physiologic differences. Resting heart rate was significantly lower after floatation-REST than at night immediately before the session in female athletes (p < 0.001, effect size [ES] = -0.223) and male athletes (p < 0.001, ES = -0.186). Heart rate variability and sleep metrics showed no specific changes. In total, 98.7% of athletes reported an overall positive floatation-REST experience, and 85.3% felt better postsession, citing reduced soreness, stress, and fatigue, with improved energy. Thus, although more research is needed, these data provide a positive outlook for the use of this recovery technology in collegiate athletes.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144004927","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}