Crunch machines usually use extra resistance in the form of selectorized weight stacks or plate loading, and are often performed for moderate to high reps, like 8-12 reps per set or higher , as part of the ab-focused portion of a workout.
Crunch machines usually use extra resistance in the form of selectorized weight stacks or plate loading, and are often performed for moderate to high reps, like 8-12 reps per set or higher , as part of the ab-focused portion of a workout.