Essential Strength Ab Crunch/Back Extension
Style # ES-55A08YR
Commercial-Grade Frame Construction:
Main frame: 4.65″ × 2.95″ × 0.12″ semi-elliptical steel tubing
Functional area: 4.72″ × 1.97″ × 0.12″ flat oval tubing
Movement arms: 3.15″ × 1.57″ × 0.12″ steel tubing
Joint sections: 3.94″ × 1.97″ × 0.12″ flat oval tubing
All structural components utilize high-quality Q235 steel
Smooth & Controlled Performance:
Precision-engineered movement arms provide a fluid, consistent range of
motion for both abdominal and lower back exercises
High-strength 7×19 strand cable system rated for up to 3,080 lbs ensures longterm durability and reliable performance
Dual-Function Efficiency:
Combines ab crunch and back extension movements into one compact unit
Promotes balanced core development and efficient use of training space
Full Shroud Design:
Durable full shrouds constructed from 0.16″ thick virgin ABS for enhanced safety
and a clean, modern appearance
Comfort-Driven Components:
High-resilience MC foam padding delivers long-lasting comfort and support
Upholstered with premium-grade PU leather for durability and easy maintenance
•Net Weight: 437lbs
•Gross Weight: 459lbs
•Footprint (L × W × H): 44.5″ × 40.9″ × 63.8″
•Weight Stack: 155lbs
The Ab Crunch/Back Extension embodies the core principles of the Essential Strength Line—durability, smooth performance, and intuitive movement. This dual-function unit allows users to effectively train both the abdominal muscles and lower back, promoting balanced core strength and improved stability.
Designed for full-commercial environments, this machine delivers controlled, biomechanically sound movement patterns for both exercises. Its compact, space-efficient design makes it a valuable addition to any training facility, offering versatility without compromising performance or durability
“ProMaxima has provided top-quality equipment for our weight room, along with outstanding installation and service. Their equipment is comparable to or exceeds the quality of more expensive products, and the service has been exceptional.”
“From day 1 our student athletes have benefited from PMX Equipment – we are seeing results on the field and on the courts.”
“PMX strength equipment has set our department up for success because of how durable, flexible, and adjustable it is depending on what season and athletes we need to train.”
