4) Cross Over, click here.
When performed correctly, this is an excellent stretch for the posterior chain and even the anterior shoulder (if the pecs, delta, and biceps are tight). It is important to shift the hips prior to kicking your leg across so that your spine stays inline as you rotate toward either side. Flexion of the lumbar spine is a common fault when practicing this stretch incorrectly and can lead to lower back injury.
Video coming soon.