Shape. Tone. Sculpt. Strengthen. Make any time crunch time with the Best Fitness Semi-Recumbent Ab Crunch Bench. This ergonomically designed machine is built to help you tighten up your midsection, strengthen your back and improve your core stability. Its dual functionality lets you target your lower abs with knee raises and your upper abs with abdominal crunches. No other machine can provide such a total ab workout from a comfortable seated position. The BFAB20's 45-degree seat angle puts you in position to isolate your abdominal muscles, for a more efficient workout. Plus, with two additional 5-degree reclining positions, you'll be ideally supported for an entire range of core exercises.