Age affects exercise-induced improvements in heart rate response to exercise
E G Ciolac1, C K Roberts2, J M Rodrigues da Silva3
1Exercise and Chronic Disease Research Laboratory, Physical Education -Department, School of Sciences, São Paulo State University - UNESP, Bauru, Brazil.
International Journal of Sports Medicine
|October 17, 2013
Summary
A 12-month exercise program improved cardiorespiratory fitness and muscle strength in all age groups of women. However, heart rate recovery benefits were reduced in older women.
Area of Science:
- Exercise Physiology
- Gerontology
- Cardiovascular Health
Background:
- Sedentary lifestyles are prevalent across adult age groups.
- Aging is associated with declines in cardiorespiratory fitness (CRF) and muscle strength.
- Understanding exercise adaptation across the lifespan is crucial for public health.
Purpose of the Study:
- To investigate the effects of age on cardiorespiratory fitness (CRF), muscle strength, and heart rate (HR) response to exercise.
- To analyze adaptation to a 12-month combined aerobic and resistance exercise program in women of different age groups.
Main Methods:
- 85 sedentary women were divided into four age groups: young (YG), early middle-aged (EMG), late middle-aged (LMG), and older (OG).
- Participants underwent a 12-month twice-weekly combined aerobic and resistance exercise program.
- Cardiorespiratory fitness (CRF), muscle strength (1-RM test), and heart rate (HR) response (graded exercise test) were measured pre- and post-intervention.
Main Results:
- Exercise training significantly improved CRF and muscle strength in all age groups, with no significant inter-group differences.
- Resting HR and HR recovery improved in YG and EMG, but not in LMG and OG.
- Maximal HR remained unchanged across all groups.
Conclusions:
- Combined aerobic and resistance training is effective for improving CRF and muscle strength across the lifespan in women.
- Age-related impairments in heart rate recovery following exercise may exist in late middle-aged and older women.
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