Reply #19: Actually

[Caution]

Just about any trainer will tell you this. Even professional athletes typically do not do a workout of more than 45 minutes a day. If you are doing more than this on a normal diet you will lose tons of weight and tons of muscle, you cannot sustain it and when you stop working out so much your body will take any food and convert to fat in order to store it for the next session of workout insanity. It's a cycle most people who have weight problems find themselves in.

As for "no pain, no gain." This is absolutely 100% true in terms of muscle-building. Your body does not build more muscle unless you tear muscle fibers.

The misconception is when you are injuring yourself during your workout. You should begin to feel soreness in your muscles the day after a resistance training session and it should peak on the 2nd day. It is only true "pain" the first couple of times. Your body adjucts after this and over time it simply becomes a dull ache for a couple of days and finally you really don't even notice it that much.

If you do a resistance training workout and you don't feel any pain at all in the muscle groups your worked the next day then you need to increase the weight if you wish to increase overall muscle mass.