Focus on your hands right now. Don’t look at them, just focus your mind’s eye on them. What are they doing? One might be touching your mouse or touchpad, the other resting in your lap or on an armrest. Are your shoulders hunched up? Don’t change them if they are. Just notice them.
Now focus on your feet. Are they both on the ground or is one resting over the other? Are they turned out or pointing in? what about your toes? Are maybe curled tightly under your feet? What about your hips and spine? your posture right now? Are you hunched over? Sitting up straight?
Are you comfortable?