Key result
Each 1 bpm increase in supine resting heart rate was associated with a 0.23 ml O2⋅min-1⋅kg-1 decrease in cardiorespiratory fitness over a 6-year follow-up.
Why the study?
Resting heart rate is inversely associated with cardiorespiratory fitness, but few studies have investigated the nature of this relationship in large population samples.
Cohort (n=10,865)
Yes
Mean Difference: -0.23 (95% CI -0.25–-0.2)
Resting heart rate is inversely associated with cardiorespiratory fitness, and longitudinal changes in resting heart rate can serve as a viable biomarker for tracking changes in fitness at the population level.
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Supports RHR as accessible CRF surrogate; hypothesis-generating, needs prospective validation before clinical use.
Gonzales et al. (2020) conducted a cohort in Healthy adults (n=10,865). Resting heart rate (RHR) was evaluated on Change in cardiorespiratory fitness (CRF) per 1 bpm increase in supine RHR (0.23 ml O2⋅min-1⋅kg-1 decrease, 95% CI 0.20; 0.25). Each 1 bpm increase in supine resting heart rate was associated with a 0.23 ml O2⋅min-1⋅kg-1 decrease in cardiorespiratory fitness over a 6-year follow-up.
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