HIIT is for chads.
Holy shit this is hard as fuck
A good set of hill sprints is a killer finisher
Chad has sex while YOU do cardio. He sets up three women around the room, and does a circuit, fucking each one for 45 seconds, making each one squirt every time, then on the next. He never breaks a sweat. He is still wearing the neon yellow shoes. Chad never sweats. The women pay him for it, and he declares it on his taxes as charity work, getting a big deduction, which he then donates to President Trump directly in an untraceable cryptocurrency of his own creation.