I encountered Paralympic Games mentioned on Dreamscat for several times and came up with an idea how anyone can boost one's arms effectively. Have you ever noticed how effectively many handicapped people self-actualize in sports? They tend to compensate their limitations by hypertrophying their other capabilities. This way blindmen develop phenomenal hearing; armless people learn operating their soles smoothly; legless people use their hands for moving themselves around, this was developing their hand muscles enormously.
My idea is starting a new kind of muscle training by artificially handicapping myself by, for example, binding my legs together or using a wheelchair for a couple of months and using only my hand muscles for moving around. I guess after some time passes I'll develop my hand muscles well plus gain the complex motor skills necessary for this kind of movement. In similar way I may develop hearing by blocking my vision, and so far I see only one major drawback of this