PURPOSE: The aim of this study was to examine the reliability, validity and usefulness of the 30-15IFT in competitive female soccer players. METHODS: Seventeen elite female soccer players participated in the study. A within subject test-retest study design was utilized to assess the reliability of the 30-15 intermittent fitness test (IFT). Seven days prior to 30-15IFT, subjects performed a cont...

Literature about elite sports management tends to focus on the analysis of qualitative level its success factors, especially among developed countries. In consequence, aim this study is perform a predictive causal that examines factors influencing development athletes within Valle del Cauca region in Colombia. 171 valid surveys were performed direct stakeholders sports. The goodness fit, compos...

BACKGROUND The aorta is exposed to hemodynamic stress during exercise, but whether or not the aorta is larger in athletes is not clear. We performed a systematic literature review and meta-analysis to examine whethere athletes demonstrate increased aortic root dimensions compared with nonathlete controls. METHODS AND RESULTS We searched MEDLINE and Scopus from inception through August 12, 201...

AIMS Identification of a prolonged, corrected QT (QTc) interval in athletes may be a recommendation for disqualification from competitive sports. However, the prevalence and diagnostic significance of an isolated prolonged QTc in asymptomatic athletes without familial disease is unknown. METHODS AND RESULTS Between 1996 and 2006, 2000 elite athletes (mean age, 20.2 years) underwent 12-lead EC...

Background Endocrine profiles have been measured on blood samples obtained immediately post-competition from 693 elite athletes from 15 Olympic Sports competing at National or International level; four were subsequently excluded leaving 689 for the current analysis. Methods Body composition was measured by bioimpedance in a sub-set of 234 (146 men and 88 women) and from these data a regressio...

PURPOSE Trainers and physical fitness coaches' need a useful tool to assess training loads to avoid overtraining. However, perceived scales or questionnaires were required. Therefore, the purpose of this study was to assess whether a short 8-item questionnaire of fatigue could be a useful tool for monitoring changes in perceived training load and strain among elite rugby Sevens (7s) players dur...

BACKGROUND Male athletes participating in certain elite sporting activities may be at an increased risk for development of hip osteoarthritis (OA) later in life. However, the strength of the association of participation in sporting activities with the increased risk of hip OA has not been well summarized. PURPOSE To investigate the association of certain high-impact sporting activities with t...

BACKGROUND We hypothesize that prostate specific antigen (PSA), a protein that it is under regulation by androgens, may be differentially expressed in female elite athletes in comparison to control women. METHODS We conducted a cross-sectional study of 106 female athletes and 114 sedentary age-matched controls.  Serum from these women was analyzed for complexed prostate specific antigen (cPSA...