"Being flexible on all sides...equally...improves posture and helps prevent injury...
Everybody's flexibility is different. Your right side may be more flexible than your left. That is normal...BUT, it is important to have balance in your flexibility...(your right side as flexible as your left...your front side as flexible as your back.)
If some muscles get stretched more than others, they tend to become overstretched, while the understretched muscles shrink and become tight.
This creates incorrect posture and the likelihood of injury.
Stretch all muscles at least 10-15 seconds daily if you can, to reep the physical benefits. Anything less than 10 seconds has no benefit."
--from my book "Real Health Real Life."