Heart Rate Dynamics after Combined Strength and Endurance Training in Middle-Aged Women: Heterogeneity of Responses
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Why the study?
Does combined strength and endurance training improve heart rate complexity and variability compared to endurance or strength training alone in healthy middle-aged women?
Population
90 healthy, previously untrained women aged 40 to 65 years. Excluded: cardiovascular or musculoskeletal…
Comparison
21-week progressive training period of either… vs Control group (no training).
Design
RCT, randomized into four groups
Follow-up
21 weeks
Authors
Discussion
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Implication
Endurance training alone may optimize autonomic adaptations during exercise; combined training challenges additive benefits in middle-aged women.
Structured PICO
Does combined strength and endurance training improve heart rate complexity and variability compared to endurance or strength training alone in healthy middle-aged women?
P
Population
90 healthy, previously untrained women aged 40 to 65 years. Excluded: cardiovascular or musculoskeletal disorders, diabetes, or medications influencing cardiovascular or neuromuscular performance.
I
Intervention
21-week progressive training period of either endurance training (twice a week), strength training (twice a week), or combined strength and endurance training (four times a week).
C
Comparator
Control group (no training).
O
Outcome
Heart rate complexity (assessed via multiscale entropy analysis) and traditional heart rate variability indices (SDNN, HFP, LFP) during supine rest and submaximal steady state exercise.surrogate
Endurance training improves heart rate complexity and variability during exercise in middle-aged women, but adding strength training may interfere with these autonomic adaptations.
Limitations
- Short duration of RR interval recordings limiting multiscale entropy analysis to scales 1-2 during exercise
- Low training frequency (twice a week) for endurance training may have been insufficient to produce further improvements in latter half of training
Cite This Study
Karavirta et al. (2013) studied this question.
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