Yes, there is gym training in BMT. And the PTI will teach and
instruct you on many fine points on how to use the equipment, how
to calculate your max 1 rep, cardio and muscular etc.
Everyone will do weights according to their own strength and
potential etc. On average, if you at on PTP, then its about twice a
week. For BMT, as there are many other lessons like range/shoot,
obstacle courses, endurance runs, guards, etc...so at most is gym
once a week.
=)