@stk really good. I use a similar system (Coros watch) to keep my heart range below 130bpm. Works well and keeps me going a sensible pace. I should add ... I walk not run.
El Perro Negro's Day to Day Ramblings
@stk really good. I use a similar system (Coros watch) to keep my heart range below 130bpm. Works well and keeps me going a sensible pace. I should add ... I walk not run.