My Dad Is 72 Yrs Old And Was Getting Up

My dad is 72 yrs old and was getting up to go to the bathroom the other night but had no physical strength to get up so he rolled himself out of bed and crawled to the bathroom and after sitting for a while was fine. He had no chest neck or arm pain and was able to move all exsremitys and speak fine just no physical strength. He does have pulmonary. Fibrosis