Journal of Sports Medicine最新文献_第6页

A Meta-Analysis of Soccer Injuries on Artificial Turf and Natural Grass. 人造草皮与天然草皮足球损伤的meta分析。

Journal of Sports Medicine Pub Date : 2013-01-01 Epub Date: 2013-06-19 DOI: 10.1155/2013/380523

Jay H Williams, Emmanuel Akogyrem, Jeremy R Williams

{"title":"A Meta-Analysis of Soccer Injuries on Artificial Turf and Natural Grass.","authors":"Jay H Williams, Emmanuel Akogyrem, Jeremy R Williams","doi":"10.1155/2013/380523","DOIUrl":"https://doi.org/10.1155/2013/380523","url":null,"abstract":"The goal of this investigation was to determine if playing or training on third-generation artificial turf (AT) surfaces increases the incidence rate of injuries compared to natural grass (NG) surfaces. This was accomplished by a meta-analysis performed on previously published research. Eight studies met the criteria of competitive soccer players, participation on both surfaces, and presentation of both exposure time and injury occurrence. Exposure time and injury incidence values were used to generate injury rate ratios (IRRs, AT/NG) for all injuries as well as specific injuries. Subgroup analyses were also performed by condition (match or training), gender, and age (youth or adult). The overall IRR was 0.86 (P < 0.05) suggesting a lower injury risk on AT than NG. However, there was considerable heterogeneity between studies. Analyses of individual injuries and subgroups found that in many cases IRR values were significantly less than 1.0. In no case was the IRR significantly greater than 1.0. Based on this, it appears that the risk of sustaining an injury on AT under some conditions might be lowered compared to NG. However, until more is known about how issues such as altered playing styles affect injury incidence, it is difficult to make firm conclusions regarding the influence of AT on player safety. ","PeriodicalId":30574,"journal":{"name":"Journal of Sports Medicine","volume":"2013 ","pages":"380523"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/380523","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34257001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Interrater and Intrarater Reliability of the Tuck Jump Assessment by Health Professionals of Varied Educational Backgrounds. 不同教育背景卫生专业人员塔克跳评估的解释者和解释者信度。

Journal of Sports Medicine Pub Date : 2013-01-01 Epub Date: 2013-12-16 DOI: 10.1155/2013/483503

Lisa A Dudley, Craig A Smith, Brandon K Olson, Nicole J Chimera, Brian Schmitz, Meghan Warren

{"title":"Interrater and Intrarater Reliability of the Tuck Jump Assessment by Health Professionals of Varied Educational Backgrounds.","authors":"Lisa A Dudley, Craig A Smith, Brandon K Olson, Nicole J Chimera, Brian Schmitz, Meghan Warren","doi":"10.1155/2013/483503","DOIUrl":"https://doi.org/10.1155/2013/483503","url":null,"abstract":"Objective. The Tuck Jump Assessment (TJA), a clinical plyometric assessment, identifies 10 jumping and landing technique flaws. The study objective was to investigate TJA interrater and intrarater reliability with raters of different educational and clinical backgrounds. Methods. 40 participants were video recorded performing the TJA using published protocol and instructions. Five raters of varied educational and clinical backgrounds scored the TJA. Each score of the 10 technique flaws was summed for the total TJA score. Approximately one month later, 3 raters scored the videos again. Intraclass correlation coefficients determined interrater (5 and 3 raters for first and second session, resp.) and intrarater (3 raters) reliability. Results. Interrater reliability with 5 raters was poor (ICC = 0.47; 95% confidence intervals (CI) 0.33-0.62). Interrater reliability between 3 raters who completed 2 scoring sessions improved from 0.52 (95% CI 0.35-0.68) for session one to 0.69 (95% CI 0.55-0.81) for session two. Intrarater reliability was poor to moderate, ranging from 0.44 (95% CI 0.22-0.68) to 0.72 (95% CI 0.55-0.84). Conclusion. Published protocol and training of raters were insufficient to allow consistent TJA scoring. There may be a learned effect with the TJA since interrater reliability improved with repetition. TJA instructions and training should be modified and enhanced before clinical implementation. ","PeriodicalId":30574,"journal":{"name":"Journal of Sports Medicine","volume":"2013 ","pages":"483503"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/483503","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34257005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Shoulder Muscle Activation of Novice and Resistance Trained Women during Variations of Dumbbell Press Exercises. 肩部肌肉的激活新手和阻力训练妇女在哑铃按压练习的变化。

Journal of Sports Medicine Pub Date : 2013-01-01 Epub Date: 2013-05-15 DOI: 10.1155/2013/612650

Joshua Luczak, Andy Bosak, Bryan L Riemann

{"title":"Shoulder Muscle Activation of Novice and Resistance Trained Women during Variations of Dumbbell Press Exercises.","authors":"Joshua Luczak, Andy Bosak, Bryan L Riemann","doi":"10.1155/2013/612650","DOIUrl":"https://doi.org/10.1155/2013/612650","url":null,"abstract":"Previous research has compared the effects of trunk inclination angle on muscle activation using barbells and Smith machines in men. Whether similar effects occur with the use of dumbbells or in women remains unknown. The purpose was to compare upper extremity surface electromyographical (EMG) activity between dumbbell bench, incline, and shoulder presses. Dominate arm EMG data were recorded for collegiate-aged female resistance trained individuals (n = 12) and novice female resistance trained exercisers (n = 12) from which average EMG amplitude for each repetition phase (concentric, eccentric) was computed. No significant differences were found between experienced and novice resistance trained individuals. For the upper trapezius and anterior deltoid muscles, shoulder press activation was significantly greater than incline press which in turn was significantly greater than bench press across both phases. The bench and incline presses promoted significantly greater pectoralis major sternal activation compared to the shoulder press (both phases). While pectoralis major clavicular activation during the incline press eccentric phase was significantly greater than both the bench and shoulder presses, activation during the bench press concentric phase promoted significantly greater activation than the incline press which in turn was significantly greater than the shoulder press. These results provide evidence for selecting exercises in resistance and rehabilitation programs. ","PeriodicalId":30574,"journal":{"name":"Journal of Sports Medicine","volume":"2013 ","pages":"612650"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/612650","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34152881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

The Relationship between Cortisol and Bone Mineral Density in Competitive Male Cyclists. 竞技男子自行车运动员皮质醇与骨密度的关系。

Journal of Sports Medicine Pub Date : 2013-01-01 Epub Date: 2013-05-29 DOI: 10.1155/2013/896821

Shannon L Mathis, Richard S Farley, Dana K Fuller, Amy E Jetton, Jennifer L Caputo

{"title":"The Relationship between Cortisol and Bone Mineral Density in Competitive Male Cyclists.","authors":"Shannon L Mathis, Richard S Farley, Dana K Fuller, Amy E Jetton, Jennifer L Caputo","doi":"10.1155/2013/896821","DOIUrl":"https://doi.org/10.1155/2013/896821","url":null,"abstract":"Objective. The purpose of this study was to determine whether race day cortisol was related to bone mineral density (BMD) in competitive male cyclists. A secondary purpose was to determine additional factors associated with BMD in competitive male cyclists. Methods. Measurements of lumbar spine and hip BMD were performed in 35 male competitors in a state championship cycling time trial event. Salivary cortisol was measured 10 minutes prior to the start of the race and 5 minutes after race finished. Participants reported daily calcium intake, age, years of bike training, races per season, and average weekly minutes spent riding a bike, weight training, and running on a survey. Results. Cortisol level increased significantly from pre- to postcompetition but was not significantly associated with BMD. Increased weekly minutes of weight training was associated with higher BMD of the lumbar spine and the hip. The increased number of years of cycling experience was associated with lower BMD of the femoral neck. Increased daily calcium intake was associated with higher BMD of the lumbar spine and femoral neck. Conclusions. Findings indicate that cyclists should participate in weight training and increase calcium intake in order to increase or maintain BMD of the lumbar spine and hip. ","PeriodicalId":30574,"journal":{"name":"Journal of Sports Medicine","volume":"2013 ","pages":"896821"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/896821","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34152882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

The Acute Effects of Upper Extremity Stretching on Throwing Velocity in Baseball Throwers. 上肢伸展对棒球运动员投掷速度的急性影响。

Journal of Sports Medicine Pub Date : 2013-01-01 Epub Date: 2013-11-07 DOI: 10.1155/2013/481490

Michael Williams, Lanisa Harveson, Jason Melton, Ashley Delobel, Emilio J Puentedura

{"title":"The Acute Effects of Upper Extremity Stretching on Throwing Velocity in Baseball Throwers.","authors":"Michael Williams, Lanisa Harveson, Jason Melton, Ashley Delobel, Emilio J Puentedura","doi":"10.1155/2013/481490","DOIUrl":"https://doi.org/10.1155/2013/481490","url":null,"abstract":"Purpose. To examine the effects of static and proprioceptive neuromuscular facilitation (PNF) stretching of the shoulder internal rotators on throwing velocity. Subjects. 27 male throwers (mean age = 25.1 years old, SD = 2.4) with adequate knowledge of demonstrable throwing mechanics. Study Design. Randomized crossover trial with repeated measures. Methods. Subjects warmed up, threw 10 pitches at their maximum velocity, were randomly assigned to 1 of 3 stretching protocols (static, PNF, or no stretch), and then repeated their 10 pitches. Velocities were recorded after each pitch and average and peak velocities were recorded after each session. Results. Data were analyzed using a 3 × 2 repeated measures ANOVA. No significant interaction between stretching and throwing velocity was observed. Main effects for time were not statistically significant. Main effects for the stretching groups were statistically significant. Discussion. Results suggest that stretching of the shoulder internal rotators did not significantly affect throwing velocity immediately after stretching. This may be due to the complexity of the throwing task. Conclusions. Stretching may be included in a thrower's warm-up without any effects on throwing velocity. Further research should be performed using a population with more throwing experience and skill. ","PeriodicalId":30574,"journal":{"name":"Journal of Sports Medicine","volume":"2013 ","pages":"481490"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/481490","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34257004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6