Question: ab workouts to do at the gym?
Answer: 1 Dumbbell crunch. Reps 10 Rest 10sec. Lie on your back, holding a dumbbell or weight plate across your chest in both hands. ... 
2 Tuck and crunch. Reps 15 Rest 10sec. ... 
3 Modified V-sit. Reps 12 Rest 10sec. ... 
4 Crunch. Reps 20 Rest 90sec.