Weight lifting and injuries

Jordo!

Stretch for a good 20-30 seconds in between every set.

At the first sign of joint or ligament pain, drop back on the weight and keep the affected part iced and wrapped whenever possible.

And, a fantastic workout all in and of itself: sprint.

Sprinting will build muscle, burn fat, and strengthen your heart and lungs. It is also quite difficult... stretch legs and glutes before and after -- but, overall, should be less likely to wrench joints the way that weight training can.

Good luck!

__________________
Enjoy it. Destroy it.