Flexibility is defined as the range of motion around a joint that is influenced by bones, muscles, tendons, ligaments, and skin. Maintaining good flexibility can help prevent injuries by reducing muscle strain and backaches. There are different types of stretching, including static, ballistic, and proprioceptive neuromuscular facilitation (PNF). PNF stretching, which involves contracting and relaxing muscles through their range of motion, has been shown to be the most effective technique for improving flexibility. Guidelines for safe stretching include avoiding pain during stretches and contraindicated stretches for any medical conditions.