Getting a good cardio workout in shouldn’t be confusing. There are a lot of myths out there that put us off track.
http://www.bicycling.com/training/health-injuries/5-max-heartrate-training-myths-busted
Getting a good cardio workout in shouldn’t be confusing. There are a lot of myths out there that put us off track.
http://www.bicycling.com/training/health-injuries/5-max-heartrate-training-myths-busted