Hi awakenedsoul,
As we age our muscles shrink and that is why we need to move and exercise to build strength. Since I am retired I am starting an exercise routine. I have a treadmill at home so will walk twice a day and will do yoga stretches twice a day until I get my muscles and body built up. I just saw a yoga instructor Beth Shaw on u tube doing a hip flexor with 2 blocks under her tailbone. One leg on the floor and one pulled up to the chest. She said to do this 2to 5 minutes. She said if your hip flexors are tight it will also give you low back pain. That's me for sure. I am going to get a couple of blocks and give it a whirl. What do you think?