Exercising when wheelchair bound or chronic illness

Options
Looking for ideas to increase exercise.. ability to with PPMS and a rare genetic disorder. Suggestions ,ideas? It’s easy to do little when your body quits before you do. Body temperature is a factor.. ie it goes up... I go down..like a big bag of flour.. so any suggestions or ideas would be welcome. Thanks in advance. Currently use a wheelchair and have limited mobility and strength.

Replies