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To compare the vascular structure and health-related physical fitness between middle-aged sedentary and marathon runners.
Twenty-two middle-aged male and female, aged between 3.80 ± 0.1 years, were assigned either to a sedentary group (n = 10, 4 male and 6 female) or a marathon runner group (n = 12, 8 male and 4 female). The marathon runners underwent the combined aerobic and resistance training program, 3 days per week for 2 weeks. Aerobic training program consisted of the interval, pace tempo and LSD run training, while BW resistance exercise comprised 4 sets of 15 repetitions of Squat, Leg lunge, and Calf raise. Vital sign, body composition, muscle performance, maximum aerobic capacity and vascular structure variables, including carotid intima-media thickness and arteries stiffness were measured pre-and post-intervention. Data was analyzed by using Independent t-test Pearson’s product moment at the statistical significance level of .05 and correlation.
Marathon runners had significantly lower body weight, resting heart rate, fat mass, carotid intima-media thickness and arteries stiffness than the sedentary (0.7%, 1.8%, 4.29%, 1.39% and 4.81%, respectively). They also had significantly higher leg muscle strength and endurance, 1RM squat, sit to stand, and maximum oxygen consumption than that in sedentary (6.44%, 10.04%, 12.14%, 10.08% and 7.81%, respectively). While the muscle mass was positively correlated with VO2max,the fat mass and percent fat were negatively correlated with VO2max.
Sedentary behavior resulted in impairments in aerobic performance, muscle endurance, and muscle strength. but marathon runners had greater vascular structure, function and health-related fitness than the sedentary. The body composition was well correlated with the maximum oxygen consumption in middle-aged person.
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