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KMID : 1123820090110010027
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Health & sports medicine
2009 Volume.11 No. 1 p.27 ~ p.36
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Effects of baseline heart rate recovery and a long-term aerobic training on body fatness, cardiorespiratory fitness, and insulin resistance in middle-aged women
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Lee Eun-A
Kang Hyun-Sik
Ahn Eue-Soo
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Abstract
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The purpose of this study was to investigate how baseline values of heart rate recovery(HRR) influences on improve-ments in body fatness, cardiorespiratory fitness(CRF), and insulin resistance markers in middle-aged women. The val-ue for the HRR was defined as the difference in heart rate between peak exercise and one-minute later; a value < or = 12 beats per minute, peak exercise and two-minute later; a value < or = 42 beats per minute was considered abnormal. All the subjects participated in a supervised walking pro-gram performed at an intensity of 65% V˙O2max with a fre-quency of 3 days per week for 6 months. At the baseline, the normal HRR group had significantly higher values in CRF(P=0.048) and fasting glucose (P=-0.035) than the nor-mal HRR group. Following the 6-month walking program, both the normal and abnormal HRR groups had significant improvements in all the dependent variables with no sig-nificant group differences. Also body fatness, cardiorespir-atory fitness(CRF) and blood pressure had significant im-provements in 12-week exercise. However plasma lipids and insulin resistance markers show significant improve-ments only in long term exercise such as 6-month walking program. Heart rate recovery had significant improvements and especially abnormal group recovered to normal level in only 12 week and continuously improved until 24th week.
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KEYWORD
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parasympathetic nerve, aerocic training, body fatness, cardiorespiratory, insulin resistance
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