need to strengthen lower back

[cps]

I have come to the conclusion that my lower back is extremely weak and it must be fixed. I have always slouched over, and recently as I have started squatting I notice that around 155lb my lower back just wants to buckle and it just doesnt seem strong enough to support that weight well. Also jsut something like jogging a mile will killll my lower back. What are some effect exercises that I can do to help those muscles? I do seated row sometime but for some reason I think its never workin the right muscles and have never got in to doing it consistently. Any advice would be helpful, thanks.

 

[LeiYunFat]

Reverse hyper extentions, Romanian deadlifts, plank exercises, back-ups...

Search for the ones you need clarification on, both on this site and on the internet.

http://www.exrx.net/Lists/ExList/WaistWt.html (at the bottom, although all those bodyparts will help you)

http://www.webs.uidaho.edu/strength/romanian_deadlift.htm

Make sure you execute the technique correctly before you try anything with heavy weight.