I currently care for my 93 year old grandmother. She struggles with her mobility and performing her ADLs. Lately, her mantra seems to be I’m tired of being tired. Some days she can do her light exercise and get out of the house. Other days her legs don’t seem to want to work for her as if the brain can no longer communicate with the legs. She is constantly fatigued and lacks motivation - is this simply the aging process? Any suggestions?