Post lifting question:
 

Ok this may sound odd/dumb but im curious since after you lift weights you break down muscle and rebuild it and your naturally weaker after since your muscles are rebuilding. What happens if your muscles are rebuilding but you use them to say lift yourself out of a chair, is it bad for the recovering muscle or will it keep recovering while you run?

For example say I just did squats for a hour and then after Im done I sit down for a bit after my workout I stand up using my leg muscles even though I just worked them out. So, is it bad for the rebuilding muscles to be used or does it not affect them much?

I hope this isnt a to dumb question but It has been bothering me a bit so I was hoping for a decent answer if anyone knows.

After you lift, your muscles start repairing themselves. When you are doing either cardio or normal aerobic activities, your muscles are being used, but they aren't being exerted to the point of being "damaged."

Your muslces heal a lot when you are idle, but they heal the most when you are sleeping though, that's why sleep is so important.

So, basically, unless you are highly exerting your muscles, they won't be "breaking down."

Ok, Thank you Forseti I just wasnt quite sure on whether or not your muscles are re broken down when you use them again even lightly thanks just wasnt quite sure if it would be better to use arms if just exercised legs or vice versa although that would be pretty tough ><

Well when you wake up the day after lifting, and your muscles are really sore, that's a sign that they are being repaired (via rest). When you stretch, that actually helps your muscles. So one might say, doing cardio or everyday activities might actually HELP in the healing of your muscles.

Your muscles grow when you are sleeping. Getting proper rest is so important when building muscle!

This is one reason i usually workout (well, the heavy/bulk stuff) at night, because within a few hours afterwards, i go to bed and your muscles can start fully repairing. however, i don't know how much actual difference there would be (from working out earlier in the day)?

Although i don't know if it's beneficial, i find stretching and light cardio will help elminate some soreness? Which may mean it's helping the muscles rebuild? My experience though.

I don't think your muscles become sore because they've been torn and are rebuilding, I believe it has to do with the amount of lactic acid that's built up in them from your muscles contracting. And stretching removes the lactic acid built up in your muscles so that's why stretching helps the soreness go away.

I too work out at night, due to the constraits of my work. One caveat though, is working late at night energizes you, and you might have trouble falling asleep (or waking up).

Interesting. Looks like we were both wrong (Assuming this site is correct):
http://www.cockatoo.com/musclesoreness/

Interesting forseti, good post. I did not know that.

Lactic acid build up is a source of fatigue, not muscle soreness. Check this article:

I have a hard time buying that muscle soreness is not due to tearing and rebuilding. Frankly, I know that when I am sore it hurts in the entire muscle, not just around the joints where the connective tissues reside.