Key result
Low-intensity aerobic exercise training increased central arterial compliance in postmenopausal women to the same extent as moderate-intensity training when weekly energy expenditure was matched.
Why the study?
Does low-intensity aerobic exercise training improve central arterial compliance in postmenopausal women compared to moderate-intensity training when energy expenditure is matched?
Does low-intensity aerobic exercise training improve central arterial compliance in postmenopausal women compared to moderate-intensity training when energy expenditure is matched?
Low-intensity aerobic exercise training improves central arterial compliance in postmenopausal women to a similar extent as moderate-intensity training, provided total energy expenditure is matched.
Answers are grounded in this paper and cite their sources.
Supports low-intensity exercise options for arterial compliance in postmenopausal women; hypothesis-generating, needs randomized confirmation before practice change.
Regular aerobic exercise training attenuates age-related reduction in central arterial compliance, an independent risk factor of cardiovascular diseases. We tested the hypothesis that even low-intensity exercise training could increase central arterial compliance in postmenopausal women. Using B-mode ultrasound, we studied the central arterial compliance of 15 postmenopausal females (age: 52-66 years) before and after a 12-week aerobic exercise intervention. Subjects performed aerobic exercise training of the same energy expenditure (cycle exercise, total 900 kcal/week, 3-5 sessions/week) at two different exercise intensities: 7 trained at low intensity (40% heart rate reserve: L-TR) and 8 trained at moderate intensity (70% heart rate reserve: M-TR). Arterial compliance increased after exercise training in the L-TR group (0.70+/-0.32 vs. 1.06+/-0.55 mm2/mmHgX10(-1), p <0.05) and in the M-TR group (0.82+/-0.37 vs. 1.14+/-0.39 mm2/mmHgX10(-1), p <0.05). There was no significant difference in increases of arterial compliance in either group (L-TR: 0.35+/-0.38 vs. M-TR: 0.32+/-0.33 mm2/mmHgX10(-1)). These results suggest that the improvement of central arterial compliance by aerobic exercise training might not be influenced by the intensity of exercise training if the energy expenditure of the training is the same. Accordingly, even low-intensity exercise training may have the effect of improving central arterial compliance.
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Sugawara et al. (2004) studied Postmenopausal sedentary women (n=15). Low-intensity aerobic exercise training (40% heart rate reserve) vs. Moderate-intensity aerobic exercise training (70% heart rate reserve) was evaluated on Central arterial compliance. Low-intensity aerobic exercise training increased central arterial compliance in postmenopausal women to the same extent as moderate-intensity training when weekly energy expenditure was matched.
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