”I Don’t Like Running, Hopping, Skipping, Trashing About, Or Picking Up Heavy Weights.”
That’s what my barber told me. He said,” I just don’t understand it”. He has little free time and hates to exercise, but he does strength train once a week. He said, “It is the perfect workout for me; once or twice a week works”. 
In order to achieve results strength training you must work the muscles intensely. Muscles adapt and become stronger as a form of self-protection when they are exposed to more demanding work than they are equipped to handle. Demanding work, work intensely, more than they are equipped to handle – who wants to do that? No wonder my barber said what he did, “I just don’t understand it”.
A solution: Instead of seeing how much strength training your body can withstand see what is the least of exercise that will produce the most results. Yes, it will be a difficult workout (You work up to it slowly.), but it will not take long and you need not do it that often.