#4 Ab Crunch Machine
The ab crunch machine simplifies the motion of the crunch and also aids in targeting the core with enhanced precision. Using an ab crunch machine makes performing crunches easy as it locks the feet and the neck in the correct position to restrict undesirable movement.
The machine allows the user to add or remove weights for variable resistance, which ensures that the user has better stability and security during the training routine. Care should be taken to avoid overloading the weights as it could cause serious injury.
Also, read 4 Amazing Ab Workouts To Do At The Gym.
However, unlike other machines on this list, the ab crunch machine is quite bulky and does not fit well into the home gym.
Next up: Stability Ball.