Wrist-based heart-rate mon­i­tor­ing may not be so handy

Runner's World (UK) - - Fitness -

It might avoid the faff of a chest strap, but re­cent US re­search1 places a ques­tion mark over the ac­cu­racy of wrist-based heart-rate mon­i­tor­ing. Fifty sub­jects ex­er­cised while their heart rates were recorded us­ing one of four wrist-worn mon­i­tors as well as a chest-strap mon­i­tor and an elec­tro­car­dio­gram (EKG). While the chest-mon­i­tor read­ings tal­lied with the EKG, wrist-based de­vices reg­is­tered 15-34 beats per minute over or un­der. At rest, the read­ings were more re­li­able, but if heart rate is an im­por­tant met­ric for you, a wrist mon­i­tor might not pro­vide the ac­cu­racy you need.

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