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Cardiorespiratory fitness and heart rate recovery in obese premenopausal women
Author(s) -
Carroll S.,
Marshall P.,
Ingle L.,
Borkoles E.
Publication year - 2012
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/j.1600-0838.2012.01522.x
Subject(s) - cardiorespiratory fitness , medicine , heart rate , physical therapy , anthropometry , randomized controlled trial , treadmill , metabolic equivalent , physical fitness , blood pressure , cardiology , physical activity
Post‐exercise heart rate recovery ( HRR ) has been proposed as a measure of cardiac autonomic dysfunction in apparently healthy adults. We aimed to determine the effects of a lifestyle intervention on HRR among clinically obese premenopausal women. A randomized controlled trial was conducted to investigate the effects of a 3‐month non‐dieting lifestyle intervention program on cardiorespiratory fitness ( CRF ) and HRR among healthy clinically obese premenopausal women. Thirty‐one were randomly assigned to 3‐month intensive lifestyle intervention and 31 served as controls. Sixty‐one participants performed a maximal treadmill walking test with metabolic gas exchange. Baseline anthropometric measures were closely related to HRR at 1 min, which may indicate reduced parasympathetic reactivation. Post‐exercise HRR at 60 s ( HRR60 ) increased from 21.3 ± 6.2 to 27.8 ± 10.2 bpm in the intervention group compared with a smaller reduction (26.8 ± 12.3 to 24.5 ± 9.9 bpm) in controls (test for interaction P = 0.0001). HRR120 showed a significant effect of time ( P = 0.0002) with no significant interaction with lifestyle intervention. A significant increase inV ˙ O 2 p e a kwas evident in the lifestyle group (21.6 to 23.6 m L /kg/min) compared with a modest reduction in the controls (22.6 to 21.6 m L /kg/min; test for interaction, P = 0.001). Clinically obese healthy premenopausal women achieved significant improvements in HRR60 andV ˙ O 2 p e a kfollowing a 3‐month intensive lifestyle intervention.