Hypergravitational aerobics was a type of exercise that was undertaken in and around the Federation in the 23rd century, a form of aerobic exercise which utilized technology to manipulate gravity.
History and specifics[]
In the year 2251, Cadet Karl-Willem Brandhorst accused his roommate, Gary Mitchell, of only using a computer workstation when he wanted to look up the schedule for the women's hypergravitational aerobics lessons at Starfleet Academy. (TOS - My Brother's Keeper novel: Republic)