The Seated 90 Stretch is Part of the Performance Plus stretching Series. Its really effective at stretching out the hips which can get really tight from baseball. To perform the stretch, Sit upright in a chair. Cross the ankle of the affected leg over the opposite thigh just above the knee. Lean forwards, bending from the hip. Increase the stretch by placing your hand on the inside of the affected knee, and apply some downwards pressure. Do not round your back whilst you hold this position. Hold for 20 seconds and repeat 3 times each leg.