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11 Sep 2007

cardio fanatic
Hi there, just wanted to find out if two hours of cardio is good for the body. I do an hour of V-box and than afterwards an hour of Step class. Does it burn enough fat or does it burn muscle as well?
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Expert
FitnessDoc
fitnessdoc

01 Jan 0001

Hi there

It can be, but it can also be bad, depends on the situation. Some people would not handle that, for others it's quite comfortable. A couple of other things affect it as well - one is the amount of sleep you get, the type of life you have in between training (work stress), and then of course diet. But if all those are managed right, then you can do 2 hours quite easily.

Having said that, there is definitely a point at which exercise can become excessive, and you have to be on the alert for these signs. The big one is failure to perform. You may find that your daily 1km swim takes a couple minutes longer, but you feel that you are working just as hard, if not harder. If that happens for maybe 2 or 3 days in a row, then it's a sign that you need a break and should rest, even if it's just for a couple of days. Some of the others are lack of sleep, irritability, loss of enjoyment etc. Any of these should set off alarm bells, if they persist for a long time. However, until such time, keep it up and enjoy training.

Good luck
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