Safe Lifting

Here are some general safety tips to help reduce injuries when weight training. Warm up at each session with light weights.

When starting a new exercise or after laying off exercise for a week or two, start with relatively light  weights.

Pay attention to joint pain. Using lighter weights and doing more repetitions might enable you to continue your session, but only if you can do so without pain.
Incorporate exercise that work agonist and antagonist pain, core, and synergist muscles to ensure balanced strength within a group of muscles and between  opposing groups of muscles. Imbalances in strength can destabilize a joint.

Always use good form while lifting and breathe and relax through your exercise. If you can't maintain the proper form for a particular lift, you're finished with that lift for that set. And remember to rest between 30 and 60 seconds before trying another set.