Practice while sitting down

is it okay to practice singing while sitting down? and what is diffrent between practice while sitting down and practice while stand up?

Hi, Berman! Standing is preferred for your best posture and support; but if you're seated, sit on the edge of your chair so your feet are on the ground. Keep your spine long and be careful of the tendency to reach your chin forward or roll your shoulders forward. We want to be just as energized and tall in our seated posture as in our standing!