Its always a good idea to keep your legs elevated. Peopel who sit all day long or crossed legged and pool water( cellular fluid) may also ahve a tendency to develope DVT. Deep vein thrombosis.
Its just as econdary complication and a dangerous one at that.

If you ahve to sit for along period of time you will find that your legs feel like weigts, swell and look like balloons.
getting a floor cycle is great. It hidees under the desk and keeps the legs circulation going.

j