Best Fitness AB Mantis Bench (Black Finish)

• Isolates your abs: a 45° seat angle puts you in the ideal position to target the abdominals for a more efficient crunch.
• Dual function: ab crunches hit the upper abs and knee raises hit the lower abs — a complete ab workout from one machine.
• Adjustable for any user: two additional 5° reclining positions and a three-position upholstered seat suit every size and exercise.
• Comfortable and supported: upholstered upper-back support and textured grip handles — no acrobatics, no floor work.
• Add resistance: a standard weight post with spring lock lets you load it for a tougher crunch.
• Backed by a 3-year frame warranty for in-home use.

The BFAB20B’s 45-degree seat angle positions you to isolate the abdominal muscles for a more efficient workout, and two additional 5-degree reclining positions support an entire range of core exercises. Its dual functionality targets the lower abs with knee raises and the upper abs with crunches — a total ab workout from a comfortable seated position.

The ab-crunch motion uses upholstered upper-back support, textured grip handles and a standard weight post with spring lock (plus a lock-out option to help support knee raises). The knee-raise motion adds adjustable-length, 2-position foot rests and its own weight post. Unlike ab machines that require the agility of an acrobat, the BFAB20B keeps you comfortable and seated.

Best Fitness — your home, your gym.

Features

• Ergonomic 45° seat angle with two additional 5° reclining positions
• Ab crunch: upper-ab motion with upholstered back support, textured grips and a standard weight post (spring lock + lock-out option)
• Knee raise: lower-ab motion with adjustable-length, 2-position foot rests and a standard weight post
• Three-position adjustable upholstered seat
• Safety pins and bolts on the adjustable positions allow easy disassembly or a permanent set-up

Specifications

• Assembled dimensions: 163 L × 56 W × 117 H (cm)
• Product weight: 27.5 kg
• Plates: includes a Standard weight post; also accepts Olympic plates with an adapter sleeve (plates sold separately)
• Warranty: Best Fitness in-home — 3-year frame, 1-year parts (see the Warranty tab for full terms)
• UPC: 638448001428 · SKU: BFAB20B

Shipping & packaging

• Ships as 1 box — 30.4 kg, 95 × 67 × 27 cm
• Dispatched from our Adelaide warehouse (Woodville North, SA 5012); free shipping Australia-wide.

What muscles does it work?
Both your upper abs (with the crunch motion) and lower abs (with knee raises), from a comfortable, supported seated position.

Do I need to add weights?
No — it works with your bodyweight. An included Standard weight post with spring lock lets you add plates for extra resistance if you want a tougher crunch; it takes Standard plates, or Olympic plates with an adapter sleeve (plates sold separately).

Does it need assembly?
Yes — the BFAB20B ships in a single box and needs some assembly at home, with instructions included.

Is it comfortable to use?
Yes. The semi-recumbent seated position, upholstered back support and three-position seat keep you supported — no floor work required.

Will it fit different-sized users?
Yes — the 45° seat plus two 5° reclines and the three-position seat adjust for any size user.

What warranty does it come with?
A 3-year frame warranty and 1-year parts warranty, for in-home use.

Which ab bench is right for me?
The AB Mantis is a seated crunch and knee-raise machine, so you train your abs without getting on the floor. The Powerline PAB21X is plate-loaded, so you can add resistance as you get stronger. For classic sit-ups and crunches, the Best Fitness BFAB10B folds away and adjusts to 15°, 20° or 25°, and the Powerline PAB139X ab board has a fixed 18° decline. Compare them on our weight benches page.

Where does it ship from and how is it delivered?
It ships free from our Adelaide warehouse (Woodville North, SA 5012) in a single box. Orders are dispatched within 1–2 business days, with delivery typically 3–8 business days to metropolitan areas and 8–12 business days to regional and rural areas.