Key result
Real-time monitoring of the non-linear heart rate variability index DFA-alpha1 using a smartphone app successfully estimated the aerobic threshold and guided exercise intensity in a former Olympic triathlete.
Why the study?
Real-time DFA-alpha1 assessment could indicate exercise intensity without prior laboratory testing, but until recently no mobile-based product could display it in real time using off-the-shelf consumer products.
Does real-time monitoring of DFA-alpha1 using a wearable device allow for estimation of aerobic threshold and exercise intensity distribution in an endurance athlete?
Population
1 former Olympic triathlete
Design
Single-case feasibility study
Authors
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May enable real-time field intensity monitoring via wearables; leaves open validation against gold-standard thresholds.
Case Report (n=1)
No
Does real-time monitoring of DFA-alpha1 using a wearable device allow for estimation of aerobic threshold and exercise intensity distribution in an endurance athlete?
Real-time monitoring of DFA-alpha1 using consumer wearable devices is a feasible, low-cost method for estimating aerobic threshold and guiding exercise intensity in endurance athletes.
Gronwald et al. (2021) conducted a case report in Healthy (former Olympic triathlete) (n=1). Real-time monitoring of DFA-alpha1 via HRV Logger app vs. Retrospective analysis via Kubios HRV software was evaluated on Estimation of heart rate at aerobic threshold (HRVT). Real-time monitoring of the non-linear heart rate variability index DFA-alpha1 using a smartphone app successfully estimated the aerobic threshold and guided exercise intensity in a former Olympic triathlete.
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