Popsugar Fitness Workouts Ab Workouts on Instagram Torch Your Core With 7 Trainer-Approved Instagram Ab Workouts, No Equipment Necessary February 7, 2019 by Maggie Ryan View On One Page Photo 4 of 7 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Brian Nunez (@coachbriannunez) on Jan 9, 2019 at 9:46am PST Share This Link Copy ← Use Arrow Keys → 4 Brian Nunez If you want a lower-abs and oblique burn like nothing else, this high-rep workout challenge is for you, full of V-up variations and sit-up twists. The full workout is 270 reps in total, so it's OK to start lower and work your way up. Previous Next Start Slideshow WorkoutsStrength TrainingBodyweight WorkoutsAb Workouts