interesting
I can think of a couple of body weight exercises which have always helped me increase mass. Pull ups and chin ups are great for the biceps and upper back. Even if you're lifting full time you ought to incorporate these into your routine.
Handstand push ups are an awesome exercise for triceps and delts. Ohp often gives me problems in my anterior delts but handstand push ups against a wall really develop your shoulders without the problems you can get with ohp, sure the range of motion isn't great but I think that's half the reason I get problems when I do ohp! Body weight wide grip dips will certainly improve your chest development as well.
Right now I'm not lifting and I'm doing me try if body weight exercises. I won't try to pretend they can fully substitute heavy weight training but as you said you're pressed for time body weight exercises can certainly help maintain mass.
Hey guys,Some benefits of the exercises and weightlifting for the health
and fitness like,....
Reduce high blood pressure or the risk of developing high blood
pressure and high cholesterol
Reduce the risk of developing diabetes
Reduce or maintain body weight or body fat....