Key result
The number of bouts to limitation during high-intensity interval testing was primarily determined by fast recovery of oxygen consumption and heart rate, and muscle tissue saturation index at peak exercise (R=0.644).
Why the study?
It remained unclear whether the number of total bouts to limitation in high-intensity interval testing differs among individuals when performed at the same relative intensity, prompting exploration of the physiologic factors determining effort tolerance.
What physiologic factors determine tolerance to effort during high-intensity interval testing in female athletes and moderately-active females?
Comparison
Maximal incremental cardiopulmonary exercise testing and high-intensity interval testing on separate days
Authors
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HIIT tolerance factors in young females require validation; leaves open whether athlete status affects bout number at relative intensity.
Cross-Sectional (n=47)
No
What physiologic factors determine tolerance to effort during high-intensity interval testing in female athletes and moderately-active females?
Effect estimate: R=0.644
p-value: p=<0.05
High-intensity interval testing performance is determined by fast recovery of VO2 and HR rather than maximal VO2, and declines with age starting in late adolescence.
Chang et al. (2019) conducted a cross-sectional in Healthy (elite athletes and moderately active females) (n=47). Physiologic recovery factors (VO2 and HR recovery) was evaluated on Number of total bouts to limitation (Blim) in high-intensity interval testing (R=0.644, p=<0.05). The number of bouts to limitation during high-intensity interval testing was primarily determined by fast recovery of oxygen consumption and heart rate, and muscle tissue saturation index at peak exercise (R=0.644).
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