Sue, You might try adding light resistance training to your regimen. I use resistance bands called "bodylastics". Not expensive, portable and can get from Amazon. I have a regimen that targets upper and lower body on alternating days, takes me 10-15 minutes/day. I find I have more energy for the things I love to do, Tennis, Golf, Hiking etc. And as a bonus can't hurt in the fight against my lung issues. Bill