Research Directs in Strength and Performance最新文献_第2页

Minutes Played Should be Used for the Calculation of Session Rating of Perceived Exertion During Matches in NCAA Division I Women’s Soccer 在NCAA甲级女足比赛中，应使用上场时间来计算感觉体力消耗等级

Research Directs in Strength and Performance Pub Date : 2022-10-10 DOI: 10.53520/rdsp2022.10545

Silvio Polly da Costa Valladão, J. Loenneke, X. Ye, Corbit Franks, Thomas L. Andre

{"title":"Minutes Played Should be Used for the Calculation of Session Rating of Perceived Exertion During Matches in NCAA Division I Women’s Soccer","authors":"Silvio Polly da Costa Valladão, J. Loenneke, X. Ye, Corbit Franks, Thomas L. Andre","doi":"10.53520/rdsp2022.10545","DOIUrl":"https://doi.org/10.53520/rdsp2022.10545","url":null,"abstract":"Introduction: Monitoring Training Load in soccer is used to achieve the best individualized performance outcomes and to prevent injuries. However, there is no clear recommendation for which ‘match duration’ should be used in the calculation of match Session Rating of Perceived Exertion Training Load (sRPE-TL) in NCAA DI women’s soccer. Therefore, the purpose of this study was to establish a duration standard to be used in the calculation of sRPE-TL in collegiate NCAA DI women’s soccer matches. A secondary aim was to investigate whether multiple positions require the use of different durations for the calculation of sRPE-TL. Methods: Seventeen athletes (means ± standard deviations: age 20 ± 1.1 yrs., height 170 ± 6.6 cm, weight 64.6 ± 7.0 kg) participated in this study. Repeated measures correlations were used to determine the relationship between the different sRPE-TL calculations and objective variables (e.g., GPS variables and HR-based variable). Data was analyzed using the rmcorr package in R Studio executing R. Alpha was set a-priori at p ≤ 0.05. Results: The s-RPE-TL using the four ‘minutes played’ durations (‘minutes played only’, ‘warm-up added’, ‘halftime added’, and ‘warm-up and halftime added’) were strongly correlated with TLS (r = .773, .776, .789, .786), total distance (r = .825, .813, .811, .798), number of sprints (r = .716, .717, .712, .711), HSD (r = .608, .615, .609, .612), and mechanical load (r = .738, .738, .734, .732). When separated by positions, the correlations between sRPE-TL and objective data were similar across all four ‘minutes played’ durations. Conclusions: Any of the ‘minutes played’ durations should be used to calculate match sRPE-TL values for the entire team. Multiple positions do not require the use of different durations for the calculation of sRPE-TL which facilitates sRPE-TL comparisons across positions.","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124523457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Considerations for the Utilization of Questionnaires in Collegiate Team Environments 大学团队环境中问卷调查运用的思考

Research Directs in Strength and Performance Pub Date : 2022-09-28 DOI: 10.53520/rdsp2022.10546

G. Adamson, Clare Quebedeaux, Tyler Carpenter, Stuart Roche, Travis Kleifgen, Alex Curtis, Makennah J. Mills

{"title":"Considerations for the Utilization of Questionnaires in Collegiate Team Environments","authors":"G. Adamson, Clare Quebedeaux, Tyler Carpenter, Stuart Roche, Travis Kleifgen, Alex Curtis, Makennah J. Mills","doi":"10.53520/rdsp2022.10546","DOIUrl":"https://doi.org/10.53520/rdsp2022.10546","url":null,"abstract":"Questionnaires are commonplace in team and individual sports as a subjective tool to assess an athlete’s psychological perception and behavioral practices towards their performance and physical preparation. A consistent and systematic approach is required when administering questionnaires to an athlete or group of athletes. Proper questionnaire design and administration methods allow a strength and conditioning coach to effectively analyze the data and make actionable interventions when necessary. There are challenges in sports, especially team environments, which strength and conditioning professionals must maneuver to better help athletes. These challenges include sudden changes in practice or travel, coaching changes, administrative technicalities, athlete cooperation, and many more factors. When challenges arise, questionnaires are useful tool to gauge how an athlete responds to such changes. The purpose of this report is to outline strategies and considerations for strength and conditioning professionals to effectively implement questionnaires in the collegiate environment.","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124066688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fixture Congestion has Minimal Impact on External Workloads in Collegiate Soccer Players 赛程拥挤对大学生足球运动员外部工作负荷的影响最小

Research Directs in Strength and Performance Pub Date : 2022-08-31 DOI: 10.53520/rdsp2022.10544

G. Long, K. Freeland, Johnathan Hayes

{"title":"Fixture Congestion has Minimal Impact on External Workloads in Collegiate Soccer Players","authors":"G. Long, K. Freeland, Johnathan Hayes","doi":"10.53520/rdsp2022.10544","DOIUrl":"https://doi.org/10.53520/rdsp2022.10544","url":null,"abstract":"Introduction: Advances in GPS technology have allowed for the measurement of soccer players’ external workloads in competition. While short collegiate seasons with fixture congestion may pose challenges for sustained performance, no study has determined if objective measures of performance are impacted by game congestion in college soccer players.\u0000Methods: External workload variables were measured using the Polar Team Pro™ GPS device (n=19 players). Data were normalized by minutes played to account for discrepancies in playing time. Paired samples T-test was used to determine if workloads were different between the first and second games of “double-header” weekends (n=14 games).\u0000Results: In second games, sprints were significantly reduced compared to first games (0.49 ± 0.2 vs. 0.41 ± 0.1, p= 0.005), with decelerations tending to be lower (1.58 ± 0.4 vs. 1.43 ± 0.4, p= 0.06). However, there were no differences in total distance (133.3 ± 38.8 m vs. 129 ± 32.2 m, p= 0.54), high speed running (45.1 ± 13.1 vs. 47.7 ± 13.9 m, p= 0.26) and accelerations (1.5 ± 0.4 vs. 1.6 ± 0.4, p= 0.13) respectively.\u0000Conclusions: We note a small but significant difference in sprint distance with fixture congestion, despite no reduction in total distance run, high-speed running, or accelerations. These findings are unexpected due to the high demands of match play and limited recovery time between games.","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128094137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effects of Beta-Hydroxy-Beta-Methylbutyrate on Body Composition in Trained MMA Fighters β -羟基- β -甲基丁酸酯对MMA训练选手身体组成的影响

Research Directs in Strength and Performance Pub Date : 2022-02-28 DOI: 10.53520/rdsp2022.10532

José Luis de Rojas, T. Silver, J. Antonio, C. Peacock

{"title":"The Effects of Beta-Hydroxy-Beta-Methylbutyrate on Body Composition in Trained MMA Fighters","authors":"José Luis de Rojas, T. Silver, J. Antonio, C. Peacock","doi":"10.53520/rdsp2022.10532","DOIUrl":"https://doi.org/10.53520/rdsp2022.10532","url":null,"abstract":"Introduction: Nutrition plays an important role for mixed martial art (MMA) athletes preparing for competition. Additionally, nutritional supplements are widely used by athletes preparing for competition. Among the various nutritional supplements used by MMA athletes, β-hydroxy-β-methylbutyrate (HMB) is one supplement that may have positive effects on body composition during a fight camp.\u0000Methods: The current study examined 16 healthy, male professional MMA fighters (29.0±3.5 yrs.; 178.5± 7.8 cm). Participants completed a randomized, double-blinded, two group [HMB versus Placebo (Cellulose)] by two-time point [Pre-, Post-], mixed study. The study consisted of subjects supplementing HMB (3g daily) or placebo in conjunction with MMA training over a 6-week period. Supplementation was consumed after each morning training session and first thing in the morning on non-training days. Body composition was assessed via InBody770® (InBody UK, United Kingdom) for both pre- and post-intervention. \u0000Results: There were no significant (p = 0.471) differences between HMB and Placebo (Table 2) following the 6-weeks of training for weight (HMB Pre- 84.6±10.8kg, Post- 84.1±11.6kg; Placebo Pre- 87.9±14.2kg, Post- 87.9±13.5kg). There were also no significant (p = 0.095) differences for skeletal muscle mass (SMM) (HMB Pre- 42.3±5.4kg, Post- 41.8±5.1kg; Placebo Pre- 44.2±9.0kg, Post- 44.6±8.8kg). No significant (p = 0.655) differences existed for fat mass (HMB Pre- 11.3±2.5kg, Post- 11.2±3.8kg; Placebo Pre- 11.0±4.9, Post- 11.2±3.6). Lastly, no differences (p = 0.641) existed for body fat % (HMB Pre- 13.3±2.5%, Post- 13.2±3.4%; Placebo Pre- 12.8±6.4%, Post- 12.3±6.6%).\u0000Conclusion: Based on the results, the use of HMB to improve body composition in trained MMA fighters is not supported. There was also no significant difference in skeletal muscle mass during the six weeks. ","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129918784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inter-Set Voluntary Hyperventilation-Aided Recovery Does Not Improve Performance of Bench Press and Squat in Recreationally Trained Individuals 在休闲训练的个体中，组间自愿过度通气辅助恢复不能提高卧推和深蹲的表现

Research Directs in Strength and Performance Pub Date : 2022-01-26 DOI: 10.53520/rdsp2022.10529

J. Buxton, P. Prins, E. Ryan, Dalton W. Jones, Isaac Thrasher, Madison N. Faulkner, Elaine Robertson, G. Welton, D. Ault

{"title":"Inter-Set Voluntary Hyperventilation-Aided Recovery Does Not Improve Performance of Bench Press and Squat in Recreationally Trained Individuals","authors":"J. Buxton, P. Prins, E. Ryan, Dalton W. Jones, Isaac Thrasher, Madison N. Faulkner, Elaine Robertson, G. Welton, D. Ault","doi":"10.53520/rdsp2022.10529","DOIUrl":"https://doi.org/10.53520/rdsp2022.10529","url":null,"abstract":"Introduction: To examine the effects of voluntary hyperventilation (VH) between sets of bench press (BP) and squat (SQ) at 70 and 90% 1RM on repetitions to failure, power, bar velocity, blood lactate, session RPE (sRPE), and muscle oxygen saturation (SmO2).\u0000Methods: Fifteen recreationally trained (2.92 ± 2.18 yrs. of resistance training experience) college-aged males (20.27 ± 1.39 yrs., 182.40 ± 7.42 cm, 82.23 ± 10.84 kg) performed 3 sets of BP and SQ to failure at 70 and 90% 1RM on separate days with normal breathing (CON) or 30 sec of VH during inter-set rest periods.\u0000Results: There were no significant differences between conditions for repetitions, power, velocity and sRPE (p’s > 0.05) at either intensity. VH resulted in a slight attenuation of blood lactate accumulation between sets 2 and 3 of SQ (p = 0.037). There was a significant condition and intensity interaction for SmO2 of the pectoralis (p = 0.034) with VH producing higher SmO2 at 90% 1RM and lower SmO2 at 70% 1RM than the CON.\u0000Conclusions: Voluntary hyperventilation did not produce an ergogenic effect in recreationally trained individuals which, when considering current evidence, suggests other factors including training experience, may influence the effectiveness of VH.","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134104492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utilizing the Maximum Workload Range for Practice Periodization 利用最大工作负荷范围进行实践周期化

Research Directs in Strength and Performance Pub Date : 2022-01-20 DOI: 10.53520/rdsp2022.10533

Gabriel J. Sanders, C. Peacock

{"title":"Utilizing the Maximum Workload Range for Practice Periodization","authors":"Gabriel J. Sanders, C. Peacock","doi":"10.53520/rdsp2022.10533","DOIUrl":"https://doi.org/10.53520/rdsp2022.10533","url":null,"abstract":"Commentary\u0000The maximum workload range (max range) is a concept suggested by Sanders et al.1 regarding a method used to prescribe adequate practice workloads based off wearable technology data. The max range is calculated as follows from game data:\u0000Max Range = (Mean Total Distance + 1 St. Dev.) to (Maximum Total Distance)\u0000While the example provided utilizes total distance, the max range can be applied to key performance indicators such as high-speed distance, training load, jumps, etc. that are tracked throughout the competitive season in team sports. The max range concept was developed from research that found 12-17% of the time, football athletes, depending on position, accumulated game workloads outside their position’s mean + 1SD. Anecdotally, many coaches and practitioners use simple game averages as a control for ideal practice volumes. Based on previous research, using the game average as control training threshold may result in some high performing athletes being under-conditioned. It is reasonable to suggest that potential compound effects may occur throughout an entire season if athletes are not engaging in rigorous training loads that mimic game-like volumes and intensities.\u0000Figure 1. Theoretical football periodization structure for a defensive back using the max range for high intensity training days.\u0000","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127423845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Increased Anxiety and Decreased Confidence Lead to Poorer Short-Passing Performance in Collegiate Soccer Players 焦虑增加和自信心下降导致大学生足球运动员短传表现变差

Research Directs in Strength and Performance Pub Date : 2021-09-30 DOI: 10.53520/rdsp2021.10520

Mohammed Bila, A. Hillman

{"title":"Increased Anxiety and Decreased Confidence Lead to Poorer Short-Passing Performance in Collegiate Soccer Players","authors":"Mohammed Bila, A. Hillman","doi":"10.53520/rdsp2021.10520","DOIUrl":"https://doi.org/10.53520/rdsp2021.10520","url":null,"abstract":"Introduction: Competitive soccer players are required to perform short passing under stressful conditions; their success may be related to their self-confidence and anxiety levels. The purpose of this study was to examine the relationship between short-passing ability and anxiety and self-confidence among collegiate soccer players.\u0000Methods: Seventeen Division III collegiate soccer players (20.0 ± 1.0 years, 65% female) completed the Athletic Coping Skills Inventory (ACSI), Sport Competition Anxiety Test (SCAT), Trait Sport-Confidence Inventory (TSCI), and Competitive State Anxiety Inventory-2 (CSAI-2R) and the Loughborough Soccer Passing Test (LSPT). Spearman’s rho (rs) was used to identify if a relationship between these inventories and LSPT time existed.\u0000Results: Mean LSPT total time was 55.7 ± 12.0 seconds. We observed positive relationships between SCAT and LSPT total time (rs = .51, p = .04) and CSAI-2R and LSPT total time (rs = .55, p =.03). Furthermore, a strong negative relationship was found between TSCI and LSPT total time (rs = -.68, p = .004).\u0000Conclusions: There is a relationship between anxiety, confidence and short-passing performance in collegiate soccer players. Coaches should consider interventions to decrease players’ anxiety and improve self-confidence in preparation for soccer competition.","PeriodicalId":332159,"journal":{"name":"Research Directs in Strength and Performance","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134231974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Alterations in Surface Electromyography of the Upper Leg Muscles at Specified Respiratory Exchange Ratio Thresholds Ranges During a Maximal Exercise Test 在最大运动试验中，在特定呼吸交换率阈值范围内，上肢肌肉表面肌电图的变化

Research Directs in Strength and Performance Pub Date : 2021-05-27 DOI: 10.53520/rdsp2021.10510

Olivia Cooper

引用次数: 0

Mental State as a Governor of Human Performance 精神状态作为人类行为的管理者

Research Directs in Strength and Performance Pub Date : 2021-04-28 DOI: 10.53520/rdsp2021.1058

Tony Ricci

引用次数: 1