Are you looking to kick off a new fitness routine or simply make yours a little better? Our 60 Seconds To Fit video series is here to help. "Each exercise targets multiple muscle groups," says celeb trainer Sadie Kurzban. This short clip, produced in coordination with Calia, breaks down exactly how to do a V-sit with tuck."The move is part of the perfect full-body routine if you can just barely squeeze in a workout."

V-Sit With Tuck
Amp up your ab routine by replacing regular old sit-ups with this simple but effective move. "If your hip flexors are tight, you may feel them during this exercise," says Kurzban. "If that happens, decrease the range of movement of your legs. Doing so will allow your core to take on the majority of the work." Want more obliques? Instead of aiming your chest straight forward, twist your torso to one side, alternating left and right with each rep. You can also lift your arms higher to increase the intensity. Work your way up to three sets of 30 reps, resting 15–30 seconds between each set.