Group exercise classes, kettlebell training, CrossFit-style training, and circuit training can provide multiple adaptations simultaneously in a lower volume and shorter time frame compared to traditional bodybuilding isolation.

“And that opened up group exercise classes, kettlebell stuff, CrossFit type of stuff, circuit training because you can come in, you won't get so beat up because the volume is lower, the time is much lower. You get multiple adaptations at the same time.”