Here is Friday Fast Fitness - nice stretch for hands, upper back, and everything in between.

- Stand with your back about a foot from a solid surface
- Reach upward and backward to place both hands on the wall, all fingers facing downward
- Press, lifting upward, keeping the stretch in your chest and upper body.
Vary the stretch by straightening elbows more.
Do not pinch your spine backward like a soda straw at the lower back, which increases lordosis (causes hyperlordosis). Tuck hip to neutral to stop compressive pain in the lower back.
Here is how.
Breathe. Smile. Feel good stretching your upper back out of forward-rounded posture.