Exclusive HIIT Workout from Star Trainer Kayla Itsines-2: Directions: Using a timer, perform as many of the four moves in circuit 1 for seven minutes, without rest. Take a 30- to 90-second break between circuits, then perform the four exercises in circuit 2 for seven minutes. Take a 30- to 90-second break. Repeat both circuits one time.
We all want those arms that don't flap in the wind when we're waving hello, right? These five exercises with light weights make it look easy, but the small isometric moves ensure you feel the burn. Grab your two- or three-pound dumbbells and get going,