There was a recent study on hypertension, and how exercise can help lower the systolic reading. The one effective call-out was using isometric training such as a wall squat to lower pressure.
For many with Blood Cancer who deal with tight lower back. An effective yoga-like routine is the Child Pose. The child pose helps lessen lower back pressure and helps strengthen the spine. It involves getting on the floor in knee position while allowing extended arms to fall in from of you, extending the back while holding and sitting in that position.
*Please remember to discuss all exercise goals with your doctor prior to adding any exercise routine.