Journal of Sports Medicine & Doping Studies最新文献_第10页

Resistance Training Supplements and their Potential Benefit 抗阻训练补充剂及其潜在益处

Journal of Sports Medicine & Doping Studies Pub Date : 2013-11-27 DOI: 10.4172/2161-0673.1000131

L. Hayes, C. Baker, G. Bickerstaff, J. Baker

引用次数: 0

Controlling Performance and Physiological Parameters for Body Size and Inter-individual Variability due to Biological Maturation during Adolescent Growth Spurt 控制性能和生理参数的身体大小和个体间变异性由于青春期生长的生物成熟

Journal of Sports Medicine & Doping Studies Pub Date : 2013-10-26 DOI: 10.4172/2161-0673.1000E137

M. Coelho-e-Silva, J. Valente-dos-Santos, J. Duarte, D. Pindus, L. Sherar, R. Malina

{"title":"Controlling Performance and Physiological Parameters for Body Size and Inter-individual Variability due to Biological Maturation during Adolescent Growth Spurt","authors":"M. Coelho-e-Silva, J. Valente-dos-Santos, J. Duarte, D. Pindus, L. Sherar, R. Malina","doi":"10.4172/2161-0673.1000E137","DOIUrl":"https://doi.org/10.4172/2161-0673.1000E137","url":null,"abstract":"-1 min -1 ). Fat-free mass, body surface area and stature are also used as denominators. However, issues related to the validity of estimates of fat free mass and body surface area need to be considered if these variables are used as denominators. For example, 54% and 52% of the variance in anaerobic mean and peak power obtained with the Wingate test (WAnT) was predicted by biological maturation, body mass and leg length in Portuguese adolescent basketball players aged 14-16 years. Biological maturation was expressed as the ratio of skeletal age (SA) to chronological age (CA) (1). The WAnT performance is often reported in Watt per unit of body mass or per unit of thigh volume. Ratio standards, isometry and elastic similarity Simple ratio standards (mL kg -1 min -1 ; W kg -1 ; W L -1 ) have been strongly criticised (2,3). Expressing functions relative to anthropometric dimensions is meant to control for inter-individual variability in body size and is based on the assumption of geometric similarity. The ratios rely on the assumption that variables expressed as the ratio are linearly related, but the assumption can be erroneous. Although ratio standards are commonly used to control for the effects of body size on performance, other methods provide plausible alternatives. Relationships among length, surface area and volume have implications for metabolism and thermoregulation. All linear anthropometric dimensions of the body, such as stature, segment lengths, and breadths have the dimension d. All areas including body surface area and muscle cross-sectional areas have the dimension d 2 . Total body volume given by air displacement plethysmography and other volumes (lung, heart, lower limb) have the dimension d 3","PeriodicalId":17085,"journal":{"name":"Journal of Sports Medicine & Doping Studies","volume":"350 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84870157","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

Effectiveness of Whey Protein Supplement in Resistance Trained Individuals 乳清蛋白补充剂在抗阻训练个体中的有效性

Journal of Sports Medicine & Doping Studies Pub Date : 2013-10-10 DOI: 10.4172/2161-0673.1000130

F. Naclerio, A. Alkhatib, A. Jiménez

{"title":"Effectiveness of Whey Protein Supplement in Resistance Trained Individuals","authors":"F. Naclerio, A. Alkhatib, A. Jiménez","doi":"10.4172/2161-0673.1000130","DOIUrl":"https://doi.org/10.4172/2161-0673.1000130","url":null,"abstract":"Athletes and recreationally resistance-trained individuals often use protein supplements in an attempt to maximize their training gains and performance. Because of the high bioavailability and solubility and its higher proportion of essential amino acids including Leucine, whey protein extract has been proposed as the best optimal form of protein for strength and power athletes. The objective of this review is to examine the current evidence for the efficacy of whey protein containing supplements to optimize strength training adaptation and outcomes for regular resistance training practitioners.A limited numbers of studies have reported positive effects of whey protein containing supplements (including those with carbohydrate and creatine) for optimizing the anabolic responses and adaptations process in resistancetrained individuals.In order to promote a more anabolic environment and maximize muscle protein synthesis along the day, an eating pattern behavior involving frequents meals (every 3 to 5 h) containing 17 to 20 g of high quality protein (200 to 250 mg/ kg) providing 8 to 10 g of EAA (90 to 110 mg/kg) and about 2 g of Leucine (20 to 25 mg/kg) have been recommended. Special attention should be given to the periworkout hours where the ingestion of whey proteins combined with carbohydrates, creatine monohydrate (0.1 g/kg/d) and other proteins sources such as casein before, during and after workout have been shown to improve training adaptations and enhance the recovery process. However, when considering that the training conditions (workout volume, organization, number of exercises) used in the available studies are substantially different than what athletes actually perform. Optimal whey protein supplementation protocols need to specifically be based on the regular resistance training workout organization and would probably need to consider other doses and timing strategies than what is currently recommended.","PeriodicalId":17085,"journal":{"name":"Journal of Sports Medicine & Doping Studies","volume":"25 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2013-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77065522","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: 6

Effect of Training Surface on Agility and Passing Skills of Prepubescent Female Volleyball Players 训练场地对青春期前女排运动员敏捷性和传球技术的影响

Journal of Sports Medicine & Doping Studies Pub Date : 2013-09-27 DOI: 10.4172/2161-0673.1000128

E. Gortsila, A. Theos, G. Nešić, M. Maridaki

引用次数: 19

The Eurycoma Longifolia Freeze-Dried Water Extract-Physta® Does not Change Normal Ratios of Testosterone to Epitestosterone in Healthy Males 长叶Eurycoma Longifolia冻干水提取物- physta®不会改变正常的睾酮与表甾酮在健康男性的比例

Journal of Sports Medicine & Doping Studies Pub Date : 2013-09-26 DOI: 10.4172/2161-0673.1000127

A. George, E. Liske, Chengbin Chen, S. B. Ismail

{"title":"The Eurycoma Longifolia Freeze-Dried Water Extract-Physta® Does not Change Normal Ratios of Testosterone to Epitestosterone in Healthy Males","authors":"A. George, E. Liske, Chengbin Chen, S. B. Ismail","doi":"10.4172/2161-0673.1000127","DOIUrl":"https://doi.org/10.4172/2161-0673.1000127","url":null,"abstract":"Eurycoma longifolia is traditionally known for its adaptogenic properties and often used for the general well-being and increased performance in daily life. \u0000Methods: In a randomized, double blind, placebo-controlled clinical trial, 40 Malaysian men aged 30-55 years performed a battery of physical testings during which the ratio of Testosterone (T) to Epitestosterone (E) was analyzed. The daily intake was 300 mg of the freeze-dried water extract of Eurycoma longifolia root (Physta®, Biotropics Malaysia) or placebo for a period of 12 weeks. \u0000Results: At the end of the study the T/E-ratio in the herbal group ranged from 0.03 to 2.95 and was not significantly different from values at baseline (p=0.49). Further, the ratio-values for E. longifolia compared to placebo did not change over time. The weight lifting force which measures muscular strength using back & leg strength test, increased significantly from baseline to end of the study in the herbal group by approximately 14 kg (p=0.0166). \u0000Conclusion: The ratios of testosterone to epitestosterone did not change during a 12-weeks E. longifolia intake. The data suggest that this herb does not exhibit “doping”- like effects. Instead, muscular strength improved significantly in the back and leg with E. longifolia supplementation rendering this herb good for physical performance minus the doping effects.","PeriodicalId":17085,"journal":{"name":"Journal of Sports Medicine & Doping Studies","volume":"17 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72592845","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: 6

Weight Status, Physical Activity and the Associations with Health Related Physical Fitness in Nine to Twelve Year Old Scottish Children 苏格兰9至12岁儿童体重状况、身体活动与健康相关体质的关系

Journal of Sports Medicine & Doping Studies Pub Date : 2013-09-26 DOI: 10.4172/2161-0673.1000129

D. Gray, J. Baker, D. Buchan

{"title":"Weight Status, Physical Activity and the Associations with Health Related Physical Fitness in Nine to Twelve Year Old Scottish Children","authors":"D. Gray, J. Baker, D. Buchan","doi":"10.4172/2161-0673.1000129","DOIUrl":"https://doi.org/10.4172/2161-0673.1000129","url":null,"abstract":"Purpose: This study examines the associations of both BMI and waist circumference measurements to health related physical fitness. \u0000Methods: The sample included 43 boys and 49 girls (10.7 ± 0.89 years). Measures included height, weight, BMI and waist circumference, physical activity (PAQ-C) and measures of physical fitness; cardio respiratory and muscular fitness. \u0000Results: Girls were stronger on the handgrip test (P=0.045) and had a higher BMI than boys (P=0.041). Boys performed better than girls for the standing broad jump (P=0.006) and cardio respiratory fitness shuttle run (P=0.030) but not on the handgrip test. 29% (37% of girls and 21% of boys) of participants were either overweight or obese. Participants with a higher BMI performed significantly poorer than their healthy counterparts on the standing broad jump (P=0.003) and cardio respiratory fitness shuttle run (P=0.002). Similar results were found in the larger waist circumference group, standing broad jump (P=0.044) and cardio respiratory fitness shuttle run (P=0.032). Finally, participants with a higher BMI or waist circumference had a greater score for the hand grip test (P=0.006; P=0.004). \u0000Conclusion: Early detection of poor weight status and low physical fitness are important so that those in need of intervention can be targeted as early as possible.","PeriodicalId":17085,"journal":{"name":"Journal of Sports Medicine & Doping Studies","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83879533","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: 6

Tendon and Ligament Tissue Engineering, Healing and Regenerative Medicine 肌腱和韧带组织工程，愈合和再生医学

Journal of Sports Medicine & Doping Studies Pub Date : 2013-09-08 DOI: 10.4172/2161-0673.1000126

A. Moshiri, A. Oryan

{"title":"Tendon and Ligament Tissue Engineering, Healing and Regenerative Medicine","authors":"A. Moshiri, A. Oryan","doi":"10.4172/2161-0673.1000126","DOIUrl":"https://doi.org/10.4172/2161-0673.1000126","url":null,"abstract":"Tendons transmit forces from muscle to bone and provide the joint function and ligaments transmit forces from bone to bone and provide joint stability. Tendon and ligament injuries have high incidence and management of tendon and ligament injuries is technically demanding because the healing response of these soft connective tissues is low. In addition, number of the available options to be considered as tissue replacement for large defects is low and healing of tendon and ligaments is faced to significant limitations. Among the available options, autografts are still gold standard but all the auto- allo and xenografts have their own limitations. Tissue engineering is a newer option but it is still primitive to be applicable extensively, in clinical setting. Tissue engineering could be divided into four categories including scaffolds, healing promotive factors, stem cells and gene therapy. To be able to have a good judgment regarding the management of tendon and ligament injuries, it is crucial to have a basic knowledge of tendon and ligament healing and regeneration. In this review, we discussed various types of tendon and ligament injuries and their incidence, and introduced the available and future options in managing large and massive tendon and ligament injuries. We specifically discussed the tissue engineering and it’s advantageous and disadvantageous. To give a better clarification for the readers, we described different phases and cascades of tendon and ligament healing, modeling and remodeling, host-graft interaction after implantation of the graft and various types of prosthetic implants and finally provided some suggestions for the future investigations.","PeriodicalId":17085,"journal":{"name":"Journal of Sports Medicine & Doping Studies","volume":"24 1","pages":"1-18"},"PeriodicalIF":0.0,"publicationDate":"2013-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90867558","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: 38

Anterior Cruciate Ligament Mechanoreceptors Regeneration Following Reconstruction Using Autografts 自体交叉韧带重建后机械感受器再生

Journal of Sports Medicine & Doping Studies Pub Date : 2013-09-07 DOI: 10.4172/2161-0673.100E136

A. Angoules

引用次数: 1

Genetic Predictors of Adenosine Monophosphate Deaminase Deficiency 单磷酸腺苷脱氨酶缺乏症的遗传预测因子

Journal of Sports Medicine & Doping Studies Pub Date : 2013-08-31 DOI: 10.4172/2161-0673.1000124

L. Hayes, Fraser E. Houston, J. Baker

引用次数: 0

Acute Resistance Exercise Program Variables and Subsequent Hormonal Response 急性阻力运动项目变量和随后的激素反应

Journal of Sports Medicine & Doping Studies Pub Date : 2013-08-30 DOI: 10.4172/2161-0673.1000125

L. Hayes, G. Bickerstaff, J. Baker

引用次数: 2