Comparison of the Effects of Static Stretching and Full Range of Motion Strength Training on Posterior Band Flexibility

This study is comparing two methods for improving flexibility in the back of the leg (the posterior chain, including hamstrings and calves): traditional static stretching versus full range-of-motion strength training exercises. The goal is to determine which approach is more effective for improving flexibility in healthy adults. **You may be eligible if...** - You are 18 years of age or older - You have had no lower limb, spinal, or head injuries in the last 6 months - You have had no lower limb, spinal, or brain surgeries in the last 6 months **You may NOT be eligible if...** - You are under 18 years of age - You have had injuries to the lower limbs, spine, or head in the past 6 months - You have had surgery on the lower limbs, spine, or central nervous system in the past 6 months - You have a neurological or musculoskeletal condition affecting your ability to stretch or exercise safely Talk to your doctor to see if this trial is right for you.