is heart rate the key to excercise as long as I keep my heart rate up this is what counts because I was told that I should cross train but if I only walk or run if I keep my heart rate up is that what counts. or is it something with the muscle and that I need to cross train
another question is I walk/jog 30 minutes a day then do 5 minutes of adominal excercise can I just drop the 5 minutes of adominal and just do 5 more minutes of walk/jog I basicly keep my heart rate up to where I can just bare it
thanks
another question is I walk/jog 30 minutes a day then do 5 minutes of adominal excercise can I just drop the 5 minutes of adominal and just do 5 more minutes of walk/jog I basicly keep my heart rate up to where I can just bare it
thanks