Journal of Strength and Conditioning Research最新文献

{"title":"Jump Squat Vs. Resisted Sprint Training Programs Applied to Elite Youth Soccer Players: Effects on Sprint and Power-Related Performance.","authors":"Irineu Loturco, Lucas A Pereira, Valter P Mercer, Lucas P Oliveira, Vinicius Zanetti, Lucas Lima, Thiago Bastos, Túlio B M A Moura, Michael R McGuigan","doi":"10.1519/JSC.0000000000004918","DOIUrl":"10.1519/JSC.0000000000004918","url":null,"abstract":"<p><strong>Abstract: </strong>Loturco, I, Pereira, LA, Mercer, VP, Oliveira, LP, Zanetti, V, Lima, L, Bastos, T, Moura, TBMA, and McGuigan, MR. Jump squat vs. resisted sprint training programs applied to elite youth soccer players: effects on sprint and power-related performance. J Strength Cond Res 38(12): 2107-2113, 2024-This study examined the effectiveness of 2 different and widely used training programs on the sprint and power-related performance of youth soccer players. Two distinct training strategies-vertically oriented jump squats (JSs) or horizontally oriented resisted sprints (RSs)-were executed under the same absolute loading conditions (i.e., 30% of the athletes' body mass [BM]) during a 4-week preseason period. Training schemes, loading intensities (based on %BM), and the number of experimental sessions were designed in conjunction with the soccer club's coaching staff, considering the calendar, available resources, and regular training programs. Twenty-five under-17 soccer players performed a series of speed, power, and jump tests before and after 10 resisted training sessions, consisting solely of loaded JS or RS. Overall, neither group (i.e., JS or RS training groups) exhibited any improvement in linear sprint and change-of-direction (COD) speed. Conversely, vertical jumping ability and peak velocity in the loaded JS increased significantly only in the JS group, which may positively affect players' performance and training prescription during short soccer preseasons. Given the challenges in enhancing sprint speed among soccer players during preseasons (and even over the competitive season), coupled with the limited effectiveness of RS in improving sprinting, COD, and jumping capabilities within congested and short training phases (i.e., ≤4 weeks), the regular use of RS training methods during these phases may be highly questionable. Coaches should carefully consider these critical limitations and potential disadvantages when designing neuromuscular training programs for soccer players during the preparatory phases of the annual training season.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"2107-2113"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044005","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 Kinetic Enhanced Tuck Jump Assessment Exposes Residual Biomechanical Deficits in Female Athletes 9 Months Post Anterior Cruciate Ligament Reconstruction.","authors":"Lucy S Kember, Christopher D Riehm, Andrew Schille, Jake A Slaton, Gregory D Myer, Rhodri S Lloyd","doi":"10.1519/JSC.0000000000004914","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004914","url":null,"abstract":"<p><strong>Abstract: </strong>Kember, LS, Riehm, CD, Schille, A, Slaton, JA, Myer, GD, and Lloyd, RS. Residual biomechanical deficits identified with the tuck jump assessment in female athletes 9 months after ACLR surgery. J Strength Cond Res 38(12): 2065-2073, 2024-Addressing biomechanical deficits in female athletes after anterior cruciate ligament reconstruction (ACLR) is crucial for safe return-to-play. The tuck jump assessment (TJA) is used to identify risks associated with ACL injury, yet its fundamental analyses lack the ability to explore landing forces. Kinetic asymmetries during the TJA were assessed in athletes with ACLR (n = 38) and matched healthy controls (n = 21) using discrete time-point analysis and statistical parametric mapping (p < 0.05). The ACLR group performed fewer jumping cycles with distinct kinetic differences, including longer ground contact time (g = 1.45), larger peak center of mass displacement (g = 1.29), and lower peak vertical ground reaction force (VGRF) (g = -2.05) and relative leg stiffness (g = -1.51). Greater interlimb kinetic asymmetries were evident in the ACLR group for VGRF (g = 0.84), relative leg stiffness (g = 0.85), average loading rate (g = 0.84), peak braking force (g = 0.85), and time of braking (g = 0.80) and propulsive peaks (g = 1.04). Moderate differences in VGRF favored the uninvolved limb of the ACLR group for the majority (2-100%) of the stance phase of TJA (d = -0.52). Distinct jump-landing strategies between ACLR athletes and healthy controls were revealed during the TJA, which may indicate compromised stretch-shortening cycle function. Findings highlight the need for targeted rehabilitation to foster greater kinetic symmetry in jump-landing performance and underscore the importance of longitudinal and progressive monitoring for optimized return-to-play outcomes in athletes after ACLR.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"2065-2073"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983563","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 Contribution of Muscular Fatigue and Shoulder Biomechanics to Shoulder Injury Incidence During the Bench Press Exercise: A Narrative Review.","authors":"Jodi G Motlagh, David B Lipps","doi":"10.1519/JSC.0000000000004973","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004973","url":null,"abstract":"<p><strong>Abstract: </strong>Motlagh, JG and Lipps, DB. The contribution of muscular fatigue and shoulder biomechanics to shoulder injury incidence during the bench press exercise: A narrative review. J Strength Cond Res 38(12): 2147-2163, 2024-Participation in competitive powerlifting has rapidly grown over the past two decades. As a result, powerlifting-related injury incidence has likely increased proportionally. Consistent high-load training places excess strain on the multiple joints involved during the squat, bench press, and deadlift. This literature review provides a comprehensive overview of all necessary considerations for evaluating the relationship between training methods, muscular fatigue, shoulder biomechanics, and shoulder injury risk in experienced powerlifters performing the bench press. Training methods such as velocity-based training, rate of perceived exertion/repetitions in reserve, and autoregulatory progressive resistance training should be prioritized over the repetitions until failure method to minimize the risk of overexertion. Despite the high risk of shoulder injury, these findings often lack robust insights into shoulder joint biomechanics during the bench press. Assessing shoulder joint angles and moments can provide valuable insight into an athlete's bench press form and technique to minimize injury risk. With a more robust methodology (e.g., motion capture, ultrasound imaging), alterations in shoulder biomechanics can be assessed during fatiguing training sessions, leading to more generalizable findings on the impact of sex, age, training experience, and bench press form on the shoulder injury risk. This research will improve individualized programming for peak powerlifting performance and optimal shoulder injury prevention.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"2147-2163"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983901","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":"Wrist Wraps Do Not Affect Barbell Bench Press Muscular Strength, Power, or Endurance in Resistance-Trained Men and Women.","authors":"Dillon R Harris, Dakota R Harris, Thomas D Cardaci, Harry P Cintineo, Leslee K Funderburk, Steven B Machek","doi":"10.1519/JSC.0000000000004930","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004930","url":null,"abstract":"","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"e708-e715"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983907","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 Movement Sonification Auditory Feedback on Repetitions and Brain Activity During the Bench Press.","authors":"Collin Garner, Aubrey Nachtegall, Edward Roth, Alycia Sterenberg, Daekyoo Kim, Timothy Michael, Sangwoo Lee","doi":"10.1519/JSC.0000000000004927","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004927","url":null,"abstract":"<p><strong>Abstract: </strong>Garner, C, Nachtegall, A, Roth, E, Sterenberg, A, Kim, D, Michael, T, and Lee, S. Effects of movement sonification auditory feedback on repetitions and brain activity during the bench press. J Strength Cond Res 38(12): 2022-2028, 2024-Auditory stimulation and feedback have been found to enhance aspects of motor performance such as motor learning, sense of agency, and movement execution. While music is the most common form of auditory stimulation during exercise, movement sonification (MoSo) may better facilitate motor performance through its use of music elements representing dynamic movements. Despite evidence of MoSo's benefits to motor performance, little is known about MoSo's influence on resistance exercise. The purpose of this research was to investigate the effects of MoSo auditory feedback on repetitions and brain activity during bench press. Twenty men performed bench press to failure in 3 sound conditions (no-sound, self-selected music, and MoSo). Repetition maximum (RM) was measured, and brain activity was analyzed using beta power spectral density (PSD) and frontal alpha asymmetry (FAA). A 1-way repeated measures analysis of variance (ANOVA) was conducted to compare data across sound conditions. To gain a deeper understanding of brain activity during bench press, a 2-way repeated measures ANOVA was performed to investigate changes in beta PSD and FAA over time using sound and timepoint as independent variables. A 1-way ANOVA showed that FAA in MoSo was significantly higher than in music and no-sound; however, no statistically significant differences were observed in RM and beta PSD between conditions. A 2-way ANOVA revealed that beta PSD and FAA increased significantly as bench press repetitions approached failure. Our study suggests that MoSo auditory feedback may not improve bench press repetitions, but it may increase brain activity during bench press better than listening to music.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"2022-2028"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983844","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":"Unveiling Gaps in High School Strength and Conditioning: CSCS Certification, Coaching Leadership, and Facilities.","authors":"Lawrence W Judge, J Patrick Marsh, Jeffrey C Petersen, David Pearson, David Bellar","doi":"10.1519/JSC.0000000000004893","DOIUrl":"10.1519/JSC.0000000000004893","url":null,"abstract":"<p><strong>Abstract: </strong>Judge, LW, Marsh, JP, Petersen, JC, Pearson, D, and Bellar, D. Unveiling gaps in high school strength and conditioning: CSCS certification, coaching leadership and facilities. J Strength Cond Res 38(12): 2088-2098, 2024-The aim of this study was to examine the prevalence of Certified Strength and Conditioning Specialist (CSCS) and/or dedicated strength coaches overseeing strength and conditioning facilities (SCFs) at the high school level in a Southwestern state. An online survey, comprising 72 items based on a validated instrument, collected data on SCFs from high school athletic directors statewide. A total of 245 surveys were completed representing a 17.5% response rate. Descriptive, Pearson correlation, chi-square, and ANOVA analyses were conducted with an a priori alpha level of p < 0.05 established. The results revealed that only 9.4% of SCF supervisors held CSCS certification, 27.8% lacked certification, and 62.9% did not have a dedicated strength coach overseeing the SCF. Facilities led by CSCS coaches had several areas of greater equipment resources, including bench press stations ( F [2, 244] = 5.143, p = 0.006), squat stations ( F [2, 244] = 3.570, p = 0.030), and power clean stations ( F [2, 244] = 4.573, p = 0.011). This study highlights the importance of prioritizing safety considerations and meeting the developmental needs of high school athletes by addressing the absence of CSCS certifications and dedicated strength coaches overseeing SCFs. The scarcity of CSCS-credentialed coaches in high schools is troubling, considering adolescent athletes' developmental needs and recently enacted National Collegiate Athletic Association Division I safety standards for strength and conditioning coaches.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"2088-2098"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502685","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":"Manuscript Clarification for Edwards CM, da Silva DF, Puranda JL, Souza SCS, Semeniuk K, Adamo KB. Associations Between Rank, Sex, and Parity With Musculoskeletal Injuries Sustained During Annual Military Physical Fitness Test. J Strength Cond Res. 2024 Feb 1;38(2):367-373.","authors":"Tara Reilly, Hans Christian Tingelstad","doi":"10.1519/JSC.0000000000004967","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004967","url":null,"abstract":"","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"e706"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983851","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 Strength and Power Profile of Junior and Senior Female Rugby League Athletes.","authors":"Layne Flannery, Josh L Secomb, Millicent A West, Heidi R Compton, Ben J Dascombe","doi":"10.1519/JSC.0000000000004916","DOIUrl":"10.1519/JSC.0000000000004916","url":null,"abstract":"<p><strong>Abstract: </strong>Flannery, L, Secomb, JL, West, MA, Compton, HR, and Dascombe, BJ. The strength and power profile of junior and senior female rugby league athletes. J Strength Cond Res 38(12): 2129-2135, 2024-The purpose of this study was to compare the lower-body strength and power profiles of the various female rugby league (RL) competition levels, thereby establishing normative data for these athletes. Seventy-nine female RL athletes from 3 different competition levels: junior-state ( n = 45, age: 17.5 ± 0.6 years), senior-state ( n = 15, age: 24.3 ± 3.7 years), and senior-national ( n = 19, age: 25.4 ± 4.0 years) participated in this study. All testing was completed in a single session at the beginning of preseason, with the following assessments performed: countermovement jump (CMJ), isometric mid-thigh pull (IMTP), and bilateral and unilateral isometric hip adduction and abduction strength. One-way analyses of variance with Bonferroni post hoc analyses, revealed that junior-state athletes exhibited significantly lower IMTP peak force (PF) and relative PF (rPF), and CMJ height compared with the senior-state and senior-national athletes. Importantly, senior-national athletes demonstrated significantly greater body mass (80.9 ± 14.6 kg) than senior-state athletes (70.9 ± 8.1 kg), but no significant differences were identified between these athletes for any IMTP or CMJ measure. Finally, the senior-national athletes possessed significantly lower unilateral hip adduction rPF (0.13 ± 0.04 N·BW -1 ) and adduction to abduction strength ratio (0.92 ± 0.14) than senior-state athletes (0.17 ± 0.03 N·BW -1 and 1.04 ± 0.13, respectively), which may have implications for noncontact lower-body injury risk. This study highlights the importance of practitioners prescribing training to increase the lower-body strength and power of junior-state RL athletes. Whereas, for senior-state athletes progressing to senior-national levels, the focus should on maintaining or improving relative strength and power, while increasing their body mass to enhance preparedness for the greater contact demands at that level.</p>","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":" ","pages":"2129-2135"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044022","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":"Effect of Resistance Training Load on Metabolism During Exercise.","authors":"Seth F McCarthy, Derek P D Bornath, Mustafa Murtaza, Sion C Ormond, Tom J Hazell","doi":"10.1519/JSC.0000000000004929","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004929","url":null,"abstract":"","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"2029-2033"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983842","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":"Response to Manuscript Clarification for Edwards CM, da Silva DF, Puranda JL, Souza SCS, Semeniuk K, Adamo KB. Associations Between Rank, Sex, and Parity With Musculoskeletal Injuries Sustained During Annual Military Physical Fitness Test. J Strength Cond Res. 2024 Feb 1;38(2):367-373.","authors":"Chris Margaret Edwards","doi":"10.1519/JSC.0000000000004957","DOIUrl":"https://doi.org/10.1519/JSC.0000000000004957","url":null,"abstract":"","PeriodicalId":17129,"journal":{"name":"Journal of Strength and Conditioning Research","volume":"38 12","pages":"e707"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983883","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}