@fitnesstips149: Exercise can’t make adult bones longer once growth plates have closed. But these 5 stretches can improve flexibility and mobility and may help you stand more comfortably with better posture. Hold each for 30 seconds × 3. Can Exercise Make You Taller? Stretching for Height & Posture Discover 5 stretches that can improve flexibility, mobility, and posture, helping you stand taller comfortably. Learn how exercise affects height.