درخت حوزه‌های تخصصی

Background: Water polo (WP) is a sport with great aerobic/ anaerobic physiological demands. There are few studies that have evaluated the physical demands during the WP game and its relationship with the physiological indices of aerobic fitness Aim: Our aim was to determine the aerobic/ anaerobic profiles of the WP athletes through specific test. Materials and Methods: WP male athletes participated in this study (24.5±5.6 years, 85.9±10.3 kg, 183.0±6.3 cm, n=23). The athletes performed an anaerobic WP test (TAnaWP) to determine the height (Alt- cm) of the 1st/ 15th/ 30th jumps, total time(s) of the jumps (TT30) and the fatigue index (FI). Blood lactate kinetics were determined immediately after (Lac0 min) and during the recovery period; Lac 1/ 3/ 5/ 8/ 12 min. They also performed an aerobic water polo test (TAerWP) to determine maximal oxygen consumption (VO 2 max) a heart rate (HRmax), peak blood lactate (Lacp) and the second lactate threshold (LL2). Results: The following results (in cm) were obtained in TAnaWP: Alt1st (44±6), Alt15th (32±7) and Alt30th (24±9); TT30 (56.9±9.5); FI (42.0±12.5%); (Lac0), (Lac1), (Lac3), (Lac5), (Lac8) and (Lac12) (5.2±1.7; 7.8±1.6; 9.0±2.0; 9.4±2.2; 9.2±2.7; 8.5±2.2 mmol/L, respectively). The mean maximal values for the aerobic test were: VO 2 max=44.4±5.3 ml/kg/min, HRmax=174.3±9.1 bpm, Lacp=8.6±2.1 mmol/L. The values obtained at LL2 were: 157.5±13.5 bpm/ 90.5±8.2% HRmax). Conclusion: The proposed tests may be a possibility to determining the physiological fitness of WP athletes.

Purpose: Low back pain (LBP) frequently occurs in daily life. Chronic low back pain (CLBP) is defined as pain in the lumbosacral area of the spine, of more than 12 weeks' duration. The aim of this study was to compare the effect of high-power therapy (HPL) with core stabilization exercise (CSE), in the treatment of CLBP. Method: A total of 30 female patients participated in this study, with a mean (SD) age of 32.23 (7.85) years. Patients were randomly assigned into two groups and treated with HPL (HPL group, n=15), and core stabilization exercise (EXS group, n=15). ROM of lumbar spine was measured by an inclinometer. The outcomes measured pain and functional disability using visual analog scale (VAS), Roland Disability Questionnaire (RDQ), and Modified Oswestry Disability Questionnaire (MODQ). Statistical analyses were performed to compare within and between group differences. Results: ROM, VAS, RDQ and MODQ showed significantly improve after 4-week treatment in both groups (P<0.05). However, there was no significant between-group differences in any variables (P>0.05). Conclusions: Both treatments were effective in the treatment of CLBP in female athletes.