It seems like everyone in quarantine is focused on exercise. To quote one of our funniest Loupers, Susie C., people are going to emerge post-Covid one of three ways: a hunk, a chunk, or a drunk. This is for you aspirational hunks, and it is called Blood Flow Restriction Training. Sound scary, yes, but it's gaining a following. It was recommended to me by my Orthopedist to accelerate my rehabilitation activities for my knee. The idea is to maintain arterial inflow to the muscle while preventing venous occlusion. The benefits are enormous: increased muscle size, increased muscle strength, increased cardiovascular capacity, increased GH, IGF1 and maybe testosterone, and decreased joint/tissue stress. There is also little to no muscle damage, little to no recovery needed, little to no soreness or delayed onset muscular soreness (DOMS) and is low Intensity (resistance or cardio).
If it sounds too good to be true, it probably is, so please consult a doctor before you jump in and strangle your muscles!