I have a client who is reporting a lower than normal HR response by 12-15 beats during high intensity intervals over the last 2 weeks.
He is a fit and healthy racer and not on any medication, nor is he over reaching by a long way.
He is reporting feeling strong and fit and motivated and putting out normal power levels - but at a lower HR. My concern is that he is unable to push his HR to its normal previous levels - so he s not just getting fitter and pushing more watts/HR.
