This dumbbell-only workout uses the complex method – essentially a circuit that employs the same piece of equipment without any rest between movements – combined with an interval format. The result is ...
c) Press through your glutes to swing the weights overhead, then lower down carefully and jump your feet back into a plank position. That's one rep. a) Lie on your back with your knees bent at 90 ...
If you have access to a variety of dumbbells, choose weights that allow you to hit the higher end of the prescribed rep range initially, but that become more challenging as the workout progresses.