Adjustable Arc-Shaped Sit up Bench Crunch Fitness Workout Multi-functional Sit Up Benches Fitness Equipment Fold-able Home Used Bench.You don\u2019t always have to spend a lot of money to find the best AB SIT-UP BENCH\u00a0 exercises\u00a0<\/b>for your purposes. There is a whole range of ab sit-up bench exercises and prices that can deliver the features you need. If you are looking for the top ab bench exercises, a lot of factors are going to be important considerations.The other thing that you need to consider of course is the price.<\/p>\nTrunk Extension<\/h2>\n
This exercise strengthens the erector spinae muscles that help extend the back and provide stability to the spine.<\/p>\n
How To:<\/strong>\u00a0Lie on your stomach with your knees bent around the end of the bench to secure them. Put your hands on the back of your head and lift your upper body off the bench until it is parallel with the floor. Hold this position for 1 to 2 seconds and then slowly lower back down.<\/p>\n Russian Twists strengthen the oblique abdominal muscles on the sides of your stomach. These muscles assist with flexing, side-bending and rotating the trunk.<\/p>\n How To:<\/strong>\u00a0Fasten your knees on the end of the bench and lie on your back. Lock your hands behind your head and perform a sit up. As you do this, rotate your right arm towards your left knee. After a 1 to 2 second hold, straighten your body and lower it back down to the bench. Repeat with the left arm moving towards the right knee.<\/p>\nRussian Twist<\/h2>\n