Hello, i haven't been in a gym for 2 weeks cause i am in my family's home and i can't.I will be back to my home in 20 days and i will start immediately my bulking.I am trying to make a new program.I am doing Upper-Lower splits i like that a lot and i want to keep working with that for now but i was thinking instead of 4 days(2upper-2lower) to add also a 5th day of full body circuit mostly bodyweight moves for example pushups,pullups,dips,lunges or something like that mostly like a form of cardio.Do you think it will be beneficial or counter productive?

And another one,i was reading about static holds and i kinda liked the idea so i am thinking to incorporate one of those in my workouts,have anyone tried them,did you see any results in muscle mass?