4
votes
2answers
850 views

Optimum heart rate for fat loss

I'm trying to figure out what the optimum heart rate should be for cardio exercise to burn fat. According to this website apparently between 60% and 70% is best for fat burning. Is this true?
1
vote
2answers
245 views

Fat and protein breakdown

I know that after depletion of glycogen body starts to use fat for fuel. If I continue working an hour or more in this state, does my body start to use proteins for energy after a while? I have some ...