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I started exercising after a long time and did some exercises of legs (running, squatting, etc). The exercise was not strenous. Just after the session I had to go to a party, so I jumped in my car and drove to the location which was an hour away. When I tried to get out of the car and stand up, I couldn't. I didn't feel any strength in my thighs. I summoned all my strength and got out of the car and collapsed back on the ground. Few people helped me get in a room and I lay there overnight. After spending the night wondering whether I had lost my legs, in the morning I was able to stand back.

Now why did this happen? What can I do prevent it from happening again?

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I would suggest seeing a doctor about this, as it's a possibly serious enough problem that a forum answer should not be the definitive solution. –  eykanal May 31 '11 at 20:32
    
@eyk I would definitely do that. Although in hindsight I can attribute 2 causes: 1.I didn't drink enough water. 2.I didn't cool off and just sat in the car for 1 hour which might have made the muscles stiff. –  Mayank Jun 1 '11 at 2:04
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2 Answers 2

up vote 7 down vote accepted

Preface: this is anecdotal, and I Am Not A Doctor™

When I first began doing squats, I noticed exactly the same thing. I never had it as bad as you, but I did notice that on my way home from the gym, while walking to the bus, I could barely get the strength to continue walking, and if I tried to run I would almost collapse. The main cause is probably that the quadriceps, the muscle group being worked out by the squat, is so essential for begin able to stand upright. With that muscle almost completely exhausted, simply standing upright is effected via synergists and stabilizers, which are nowhere near as good at keeping you up.

That being said, that level of exhaustion should not last very long. If the problem persists, definitely talk to a doctor, preferably a sports medicine specialist or orthopedics specialist.

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I had a similar experience when I was moving a few years ago. After all that heavy lifting for 16+ hours, I wore my legs out. I physically couldn't lift them any more. I just sat in the car while I waited for my wife to finish with the remainder of the small items. The next day, I was sore, but could move around normally again. I think it has to do with simple exhaustion. –  Berin Loritsch Jun 1 '11 at 12:22
    
Who owns the trademark on "I Am Not A Doctor"? Just wondering. :-) –  Joshua Carmody Jun 2 '11 at 20:19
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It could just be muscle exhaustion. FWIW, anecdotally of course, I can remember at least 2 occasions where I did heavy squats and didn't feel like I'd really pushed my limits, but then later almost fell on my face when I tried to walk up a flight of stairs. My legs felt like they were like noodles, strength-wise. I was able to walk around though, slowly and carefully.

I agree with Eykanal that you should ask a doctor though. The possibility that this could be something more serious isn't something you want to ignore.

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