One audio book I listened to described a study that was done that included weight lifters becoming lucid and working out in there lucid dreams which led to a 13% increase in muscle mass in waking life, some sports men and women use lucid dream to perfect movements or skills which translate to physical improvement and confidence.

Lucid dreaming is also being used to heal mental disorders by some psychiatrists so even if you conclude dreams aren’t real there is a cross over into the real world.