This is one exercise I have been doing for the last few months to help loosen up my back after my weights/swimming/running or cycling workouts
Position one foam roll under your shoulder blades and the other under your head
Your buttocks is on the floor and your feet are about hip width apart, knees bent.
Point your arms up toward the ceiling.
Inhale and take your arms up over your head as your push yourself backward over the rolls.
Exhale and return to the start position. Repeat 10 times.
You can adjust the position of the foam rollers if desired.