Yes, Science Says HRV is a Triathlete’s Secret Weapon
Another study touts the benefits of heart rate variability training - here’s what it says.
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Can Triathletes Trust HRV Readings From An Everyday Smartphone?
Using the existing flashlight and camera on a smartphone to obtain heart-rate variability readings is nothing new, but is it accurate enough for triathletes?
Why You Should (Sometimes) Ignore Your Training Plan
Runners make bigger improvements following a flexible workout schedule rather than sticking with a predetermined one