Hey guys, I've been on the site for years but never posted until now.
A little background:
I've been training for years and have made very good gains in the past. I've now reached the point where my upper body matches if not has begun to surpass my legs...not good, noob mistake. Now I'm trying to rectify this. Problem is that everytime I squat or do leg press I get muscle spasms or tightness in my lower glutes/hamstrings. My quads are substantially stronger than my hams and this is causing me to have inneficient leg workouts because I can't do a proper lower body push.
Now, what I'm wondering is how the hell should I go about strengthening my hamstrings and rectifying this imbalance as well as my leg flexibility.
A bit more information: stiff legged deadlifts, squats (even wit light weights or just bar), and lunges all give me muscle spasms in my hamstrings.
If someone could give me some good advice as to how to correct this it'd be much appreciated.
Thanks in advance!