Active Isolated Stretching (AIS)

Active Isolated Stretching (AIS) offers rapid flexibility gains through 2-second holds repeated 8-10 times, avoiding the protective stretch reflex that limits other methods. Adopted by NFL teams and elite track athletes, AIS improves range of motion by up to 12% over four weeks—30% faster than the average warm-up routine. Unlike Foam Rolling and Myofascial Release (ranked #5), AIS minimizes tissue micro-tearing, preserving muscle integrity while increasing flexibility significantly.