
Originally Posted by
Little
10-15 minutes per day isn't going to get you anywhere. Cardio doesn't really work until you hit 25-30 minutes, and it isn't going to work at all if you aren't sure your heart has hit the right range.
According to the US military, fitness will not improve without at least 30 minutes of exercise three times a week. That's the bare minimum, and if you're choosing the cardio route you should not cut up that 30-minute block. Cardio depends on the length of time the heart rate is kept up, not just that it was up at all.
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