India, Nov. 14 -- Many of us cross our legs when we sit on the floor - but this position isn't completely without risks, especially for people with back trouble, say orthopaedic surgeons. Berlin (dpa) - Sitting cross-legged can benefit the hips by stretching muscles and ligaments, but it can also strain the spine and it's not suitable for people with back problems, say orthopaedic doctors. The posture is often the first choice for sitting on the floor at a picnic or when sitting down to play with a child, and certainly brings benefits for the hip joints. Done from time to time and without overdoing it, the cross-legged posture can do the body good, says orthopaedic specialist Martin Rinio. The muscles in the hips and thighs are stretched. T...