help building muscle post lung transplant

So I had a lung transplant in 2004 11 years ago, am 39 now, male, with CF, I feel like Im a good weight considering my size and don't necessarily need to put on any more just general weight but do want to put on some muscle weight. Can anyone direct me to a good routine of getting into? I do have some dumbbells and weight bench, which I occasionally do but need a good plan on getting more muscle in my arms and legs. Or maybe some of you with CF who work with weights can give me some insight on doing this. Thanks
Source: Cystic Fibrosis Exercise and Fitness Forum - Category: Respiratory Medicine Authors: Tags: Exercise & Fitness Source Type: forums