I think I just found the answer to fitness and weight gain. Since my Dbs success I've been hitting the gym 3x weekly. I actually gained 30 lbs but unfortunately it's been 50/50 muscle:fat according to my bmi scale. I just haven't been able to walk enough to keep the fat down.
Today I purchased a Catrike, a recumbent trike. It's all aluminum construction and 30 ratios make it easy to keep it going without over fatigue. It does require routing for wide shoulder streets and roads though. I've ridden it twice for 40 minutes today without any distress to my feet and knee issues that keep me from walking the same amount of time. YEAH!