@carlosmurray706: I never realized how little tension my abs were getting from floor crunches until I tried this. The Sunny Health Ab Crunch machine keeps constant tension on my core, and you can actually see my abs contracting on every rep. Adjustable resistance helps keep my workouts challenging. Guided motion keeps the focus on my abs instead of my neck and lower back. @SunnyHealthFitness #dealsforyoudays #abworkout #abmachine #coretraining #homegym