Make a list of abs-boosting workouts in the gym.

Sure, here are some abs-boosting workouts that you can do in the gym:

1. Planks: This classic exercise is great for building core strength and stability. Start in a push-up position, but instead of lowering yourself to the ground, hold the position with your arms straight and your body in a straight line from head to heels. Try to hold the position for 30 seconds to start, and work your way up to a minute or more.
2. Russian twists: Sit on the floor with your knees bent and your feet flat on the ground. Lean back slightly and lift your feet off the ground so that your shins are parallel to the floor. Hold a weight or medicine ball in both hands, and twist your torso to the right, bringing the weight towards your right hip. Return to center, and then twist to the left, bringing the weight towards your left hip. Repeat for several reps.
3. Cable crunches: Stand facing a cable machine with a rope attachment. Hold the rope behind your head with your elbows bent, and then crunch forward, bringing your elbows towards your knees. Slowly return to the starting position and repeat for several reps.
4. Hanging leg raises: Hang from a pull-up bar with your arms straight and your legs together. Keeping your legs straight, raise them up towards the bar as high as you can, and then slowly lower them back down. Repeat for several reps.
5. Bicycle crunches: Lie on your back with your hands behind your head and your knees bent. Lift your head, neck, and shoulders off the ground, and bring your right elbow towards your left knee while straightening your right leg. Then switch sides, bringing your left elbow towards your right knee while straightening your left leg. Repeat for several reps.

Remember, consistency is key when it comes to building core strength and improving your abs. Aim to do these exercises at least three times a week.