Have you taken time to stretch and loosen up your body?
I bet your shoulders feel tight. Are they tight?
What about your hamstrings?
The whole back side of your body?
How is your back?
Take a moment to stretch. You'll feel better because of it.
Stand up and do a forward bend.
Take your legs just more that hip width apart and then bend right at your waist. Reach for the floor. If you can't touch the floor, just reach for it. You'll get there if you practice.
Can you reach the floor comfortably? Start reaching behind you. Constantly challenge your flexibility.
Come up. Very slowly. Slower. One vertebrae at a time. Head comes up last.
Do a forward bend one more time. Hold for 10-20 seconds. Roll up slowly. Reach your hands above you. Stretch.