z_bumbi
2011-03-14, 09:46
Med Sci Sports Exerc. 2011 Feb 28. [Epub ahead of print]
Effects of an Eight-Month Exercise Training Program on Off-Exercise Physical Activity.
Rangan VV, Willis LH, Slentz CA, Bateman LA, Shields AT, Houmard JA, Kraus WE.
1Division of Cardiology, Duke University Medical Center, Durham NC. 2Department of Exercise and Sports Science and Human Performance Laboratory, East Carolina University, Greenville, NC. 3Duke University Center for Living, Durham NC.
Abstract
PURPOSE: An active lifestyle is widely recognized as having a beneficial effect on cardiovascular health. However, no clear consensus exists as to whether exercise training increases overall physical activity energy expenditure (PAEE) or whether individuals participating in regular exercise compensate by reducing their off exercise physical activity. The purpose of this study was to evaluate changes in PAEE in response to aerobic training (AT), resistance training (RT), or combined aerobic and resistance training (AT/RT).
METHODS: Data are from 82 participants in the STRRIDE-AT/RT study, a randomized trial of overweight (BMI 25-35 kg/m) adults, in which participants were randomized to receive eight months of AT, RT, or AT/RT. All subjects completed a four-month control period prior to randomization. PAEE was measured using Triaxial RT3 accelerometers, which subjects wore for a five-to-seven day period before and after the exercise intervention. Data reduction was performed with a previously published computer based algorithm.
RESULTS: There was no significant change in off-exercise PAEE in any of the exercise training groups. We observed a significant increase in total PAEE that included the exercise training, in both AT and AT/RT, but not in RT.
CONCLUSIONS: Eight months of exercise training was not associated with a compensatory reduction in off-exercise physical activity, regardless of exercise modality. The absence of compensation is particularly notable for AT/RT subjects, who performed a larger volume of exercise than did AT or RT subjects. We believe that the extended duration of our exercise training program was the key factor in allowing subjects to reach a new steady state level of physical activity within their daily lives.
Effects of an Eight-Month Exercise Training Program on Off-Exercise Physical Activity.
Rangan VV, Willis LH, Slentz CA, Bateman LA, Shields AT, Houmard JA, Kraus WE.
1Division of Cardiology, Duke University Medical Center, Durham NC. 2Department of Exercise and Sports Science and Human Performance Laboratory, East Carolina University, Greenville, NC. 3Duke University Center for Living, Durham NC.
Abstract
PURPOSE: An active lifestyle is widely recognized as having a beneficial effect on cardiovascular health. However, no clear consensus exists as to whether exercise training increases overall physical activity energy expenditure (PAEE) or whether individuals participating in regular exercise compensate by reducing their off exercise physical activity. The purpose of this study was to evaluate changes in PAEE in response to aerobic training (AT), resistance training (RT), or combined aerobic and resistance training (AT/RT).
METHODS: Data are from 82 participants in the STRRIDE-AT/RT study, a randomized trial of overweight (BMI 25-35 kg/m) adults, in which participants were randomized to receive eight months of AT, RT, or AT/RT. All subjects completed a four-month control period prior to randomization. PAEE was measured using Triaxial RT3 accelerometers, which subjects wore for a five-to-seven day period before and after the exercise intervention. Data reduction was performed with a previously published computer based algorithm.
RESULTS: There was no significant change in off-exercise PAEE in any of the exercise training groups. We observed a significant increase in total PAEE that included the exercise training, in both AT and AT/RT, but not in RT.
CONCLUSIONS: Eight months of exercise training was not associated with a compensatory reduction in off-exercise physical activity, regardless of exercise modality. The absence of compensation is particularly notable for AT/RT subjects, who performed a larger volume of exercise than did AT or RT subjects. We believe that the extended duration of our exercise training program was the key factor in allowing subjects to reach a new steady state level of physical activity within their daily lives.