Instinct Abdominal Crunch & Lower Back

The Nautilus Abdominal / Lower Back machine is a dual-function strength unit designed to train the core efficiently while maximizing space and ease of use. Part of the Instinct® Strength line, it delivers straightforward, reliable performance for facilities that value simplicity, durability, and fast user turnover. This machine combines abdominal crunch and lower back extension exercises into a single, compact footprint. Adjustable chest and back pads, along with selectable range-of-motion controls, allow users to transition smoothly between movements while maintaining proper posture and spinal alignment. The result is focused core training that supports both strength development and injury-aware programming. The Instinct platform emphasizes ease of use for all experience levels. A walk-through entry design improves accessibility, while easy-up ratcheting adjustments on moving pads make setup quick and intuitive. The selectorized resistance system uses Nautilus’ patented Lock N Load® weight selection, enabling fast, secure weight changes without interrupting the workout. Built with a Kevlar belt transmission, the Nautilus Abdominal / Lower Back machine is engineered for long service life and reduced maintenance. Rubber feet protect flooring and provide stable placement, making this unit a practical addition to gyms, studios, hotels, and training facilities seeking dependable core equipment. Features Dual-function design for abdominal crunch and back extension Clear, easy-to-read instructional placard Walk-through entry for safe, convenient access Adjustable seat with easy-up ratcheting system Adjustable chest and back pads with range-of-motion control Kevlar belt drive system for durability and low maintenance Rubber feet for floor protection and stability Patented Lock N Load® weight selection system Technical Specifications Machine Type Dual-Function Core Machine (Abdominal / Lower Back) Length 45 in / 1140 mm Width 40 in / 1020 mm Height 55 in / 1400 mm Product Weight 369 lb / 168 kg Weight Stack 120 lb / 60 kg Lock N Load® selector system included Drive System Kevlar belt transmission