Dear Mags,
Slowly work into it. Smile, Bounce for about a minute before your exercises to relax things. Take three easy breaths and relax your shoulders so the are feel like they can sink to the floor.
Notice and relax anywhere in your body (breathing, arms, etc.) and your mind that isn't relaxed.
Get enough rest and do what you can to strengthen your kidney energy.
Much Love,
Shawn