lower back pain after a workout

happens to me a bit, hamstring stretches usually help out.

 

A muscle and flexibility imbalance could definitely be the cause for it.
I used to have lower back problems and I did a few things to cure it.

For one I was working my abs out hard, but not enough planks and lower back work, so make sure to work your lower back out with your abs
Also I stopped sleeping on my stomach. I forgot why this was bad, but I remember reading about it somewhere and I could tell the difference once I stopped this
And of course stretch before your workout. Stretch your back, hamstrings and quads

 

I dont know, could be.

the idea of stretching your hamstrings is because when they get tight they lock the hip bone or socket or what ever in place and when you try and bend at the waist you end up bending more in the lower back then the waist causing extra stress on your lower back causing pains.

i assume you get pains on your right side more then your left hence why you think it has to do with the muscle size diffrence. the size diffrence might have something to do with it but its probly more so because your right hamstring has more weight to deal with and tends to get tighter then your left hamstring.

just keep your hamstrings stretched maybe do a 1-2 min hamstring stretch routine after your warm up and another after your done exercising, stretching your hamstrings will let you use your hips more when you bend taking strain off your lower back, and it will losen the pull of the hamstrings on your hips or what ever making your lower back feel less tight.

and when you stretch dont just stretch the right beause it feels tighter allways stretch both the right and left equally, you dont want to stretch the right and have the left side get tight and start to hurt.

planks and that stuff is also a good idea to strengthen your lower back.

 

Do you do alot of headmovement in the gym?

 

In addition to stretching your hamstrings, you could also try glute activation exercises. During hip extension, if your glutes don't fire, it messes up everything else. This will cause lots of problems, lower back pain just happens to be among them. At least, it's something to consider.

http://stronglifts.com/how-to-optimize-posterior-chain-power-glute-activation/

http://sportsmedicine.about.com/od/strengthtraining/ss/Glute-Activation-.htm

 

Do u know how to pin your shoulders back .Stand facing the front and keep your arm shoulder height and put it right around 180 to face the back about the spine ,.Then look over the shoulder and stretch it .Look over right shoulder for right arm left for left .That works for me I have it .What it could be is all your upperbody muscles are getting stronger and the we ones around the spine aren't getting enough flex .

 

[ame]http://www.youtube.com/watch?v=38wvOzR9mL8&feature=player_embedded[/ame]

[ame]http://www.youtube.com/watch?v=Aag2g9GvED4&feature=player_embedded[/ame]

 

[ame]http://www.youtube.com/watch?v=xEOYMP7QnDI[/ame]

 

[ame]http://www.youtube.com/watch?v=9s9mfKv9IrU[/ame]

 

[ame]http://www.youtube.com/watch?v=GftX7iQtL-4&NR=1[/ame]

 

Keep correct Form.

 

Might help you to check your shoes in addition to all the other stuff. I had the same sort of thing going on, went to the chiropractor, he told me my right back muscles were overdeveloped ('do you do anything that requires you to stand facing sideways?' *boxing*), said something about muscle spasms, scoliosis, muscles on my right pulling the muscles on my left out of position, etc.

So instead of wearing workboots to work, I tried my old running shoes (they're a size too big). Same pain, other spot in my back. Then I tried my good running shoes (correct size, width, cushioning, etc.) and haven't had a problem since.