We discuss how much cardio is enough, how injuries may not appear until way into the future so don't think you can get away with bad exercise and how there really is too much of a good thing.

Karvonen Formula for Heart Rate= [(220- Age- Resting Heart Rate) x Intensity (example- 75%)] + Resting Heart Rate

Example: For a 31 year old with resting heart rate of 58 wanting to know their 75% 

[(220- 31- 58)= 31 x 75%]= 98.25 + 58= 156

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