Have pain from sitting too long? It's time to stretch those hamstrings!

1. This is the safest way to stretch your hamstrings. Lie on the floor with knees bent. Raise one leg straight and loop a towel or strap (non-elastic) over your foot until you feel a stretch at the back of your thigh. Hold for 10-30 seconds, then switch legs. — Photos: REVATHI MURUGAPPAN/The Star

Humans are built to stand upright as our body systems work more efficiently this way.

However, most of us, especially teenagers, are now sitting more than standing or walking.