ABSTRACT
@#Introduction: The purpose of this study was to investigate the effect of incremental running intensity on heart rate variability during recovery in university-level male football athletes. Methods: Twenty healthy males aged between 19-26 years old were randomly assigned to control (no running) and intervention (modified Bruce protocol running) groups. Analyses were performed at pre-exercise, 24, 48, and 72 h post-exercise. The low-frequency (LF) and high frequency (HF) in peak, absolute power and normalised unit (n.u.), as well as LF/HF ratio, were assessed. Results: Intervention group showed a reduced LF n.u. response (ES=1.69) whereas HF n.u. showed the opposite response (ES=1.51) at 24 h post-exercise. The intervention group showed a significant difference in the LF/HF ratio at 48 h post-exercise (p=0.002; ES=1.05). Conclusion: These findings demonstrated that incremental type of exercise influence both sympathetic and parasympathetic response for at least 48 h post-exercise.
ABSTRACT
Background: Cardiovascular fitness refers to the ability of circulatory system to supply oxygen to working muscles during sustained physical activity. Objectives: To determine the cardiovascular fitness (using predicted VO2 max) among young healthy medical students in the age group of 17-19 years. Materials and methods: On the basis of physical activity performed subject were categorized into 3 category light, moderate, vigorous exerciser. Cardiovascular fitness was assessed by using treadmill exercise as per Bruce protocol. Results: Data were analyzed using the paired t-test.Conclusion.it was observed in the study that vigorous exerciser had better cardiovascular fitness than moderate and light exerciser. Conclusion: Students who had more physical activity were having better cardiovascular fitness. Hence, it is suggested that some physical activity should be mandatory in the curriculum of medical education which would help us to maintain cardiovascular fitness and reduce the risk of cardiovascular morbidity and mortality in the long run of their careers.
ABSTRACT
Background: Cardiovascular fitness has been found to be significantly compromised by obesity, whose prevalence is increasing rapidly. The present study aimed to assess the aerobic exercise performance in terms of maximum aerobic power (VO2 max) of the male students of North Bengal medical college in the age range of 18-22 years. Methods: The subjects were divided into two groups viz. control (N=52) and study (N=43) on the basis of Body Mass Index (BMI) and Waist Circumference (WC), according to the current Indian guidelines for obesity. The VO2 max was compared among the two groups. It was evaluated using the Bruce protocol, and also expressed in terms of ‘Metabolic equivalents’ (MET). Results: VO2 max exhibited significant negative correlation with BMI (r=0.75, P <0.000) and WC (r=0.72, P <0.000). VO2 max was higher for the normal group compared to the study group, and the mean difference was significantly different [P <0.05(0.000)]. Conclusion: The study thus showed that cardiovascular capacity is compromised by excess adiposity.
ABSTRACT
OBJECTIVE: To explore accuracy and validity of a VO2max prediction equation of the multistage model using by modified Bruce protocol submaximal exercise test in healthy subjects. METHOD: Thirty three healthy subjects (age: 44.0+/-12.9) were recruited. VO2max was measured during treadmill by direct gas analysis from a maximal incremental test. VO2max was then predicted from multistage model equation with age, measured oxygen consumption and heart rate during a maximal incremental treadmill test. And the predicted VO2max values from equation were compared with the measured VO2max values. RESULTS: The predicted VO2max values and the measured VO2max values were highly correlated (r=0.9, p<0.001). The predicted VO2max values (2,285.3+/-536.0 ml/min) were not significantly different from the measured VO2max values (2,285.5+/-598.5 ml/min). CONCLUSION: In healthy subjects, the multistage model equation offers a fairly accurate VO2max prediction. Therefore the equation can be used in the estimation of VO2max at modified Bruce protocol in an aerobic exercise program.