Heart Rate Variability: Response Following a Single Bout of Interval Training
Why the study?
Does a single bout of interval training affect heart rate variability at 1 hour and 72 hours post-exercise?
Population
Subjects (sample size and demographics not stated in abstract)
Comparison
A single interval training session comprising… vs Baseline and 72 hours post-training
Design
Other
Follow-up
72 hours
Authors
Discussion
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Member takes
Implication
HRV measurements require standardized exercise timing to avoid transient bias; leaves open whether interval training alters longer-term autonomic recovery in clinical populations.
Structured PICO
Does a single bout of interval training affect heart rate variability at 1 hour and 72 hours post-exercise?
P
Population
Subjects (sample size and demographics not stated in abstract)
I
Intervention
A single interval training session comprising six 800 m runs at 1 km/h below vVO2 max
C
Comparator
Baseline (prior to training) and 72 hours post-training
O
Outcome
Heart rate variability (high frequency and low frequency components, LF:HF ratio) measured via autoregressive power spectral analysis of R-R intervalssurrogate
A single bout of interval training transiently alters heart rate variability at 1 hour post-exercise, which normalizes by 72 hours, highlighting the need to control exercise timing prior to HRV assessment.
Limitations
- The time course of the post-exercise heart rate variability response remains to be quantified
Cite This Study
James et al. (2002) studied this question.