{"product_id":"sportsart-df-306-performance-lower-back-ab-crunch-machine","title":"SportsArt DF-306 Performance Lower Back \u0026 Ab Crunch Machine","description":"\u003ch1\u003eSportsArt DF-306 Performance Lower Back \u0026amp; Ab Crunch Machine\u003c\/h1\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e\n  The SportsArt DF-306 Back Extension\/Ab Crunch is a dual-function selectorized strength machine engineered to target your lower back and abdominals in a single, space-saving unit. Designed as part of SportsArt's Performance Series Strength line, it combines two opposing movement patterns - back extension and ab crunch - into one beautifully built machine without sacrificing biomechanical integrity. The unique push-pull direct drive system uses two opposing cams to eliminate cable slack and make workout changeovers fast and seamless. Built for commercial gym environments, this machine handles up to a 500 lb user weight and features a generous 220 lb weight stack.\n\u003c\/p\u003e\n\u003cp\u003e\n  Whether you're outfitting a fitness center, hotel gym, or corporate wellness facility, the DF-306 delivers professional-grade core training without requiring separate dedicated machines. Its fully adjustable chest and back pad and multiple foot supports accommodate a wide range of users and training styles.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Function Design:\u003c\/strong\u003e Combines back extension and ab crunch motions in one machine - ideal for facilities looking to maximize floor space.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Drive System:\u003c\/strong\u003e Two opposing cams reduce cable slack and allow for faster workout changeover between exercises.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFully Adjustable Chest\/Back Pad:\u003c\/strong\u003e Accommodates a wide range of user heights and body types for optimal positioning and comfort.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e220 lb Weight Stack:\u003c\/strong\u003e Plate increments of 20 x 11 lbs (5 kg) provide a smooth, wide progression range for all fitness levels.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Starting Weight:\u003c\/strong\u003e Both Ab Crunch and Back Extension start at just 7.7 lbs (3.5 kg), making it accessible for rehabilitation and beginner users.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e500 lb Max User Weight:\u003c\/strong\u003e Built to handle heavy commercial use with a robust, inclusive weight capacity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Foot Supports:\u003c\/strong\u003e Provides greater stability across varying user sizes and exercise positions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance Series Strength Build:\u003c\/strong\u003e Part of SportsArt's DF300 Series, built to commercial quality standards with a premium aesthetic finish.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 44.6 x 44.1 x 57.2 in (113.2 x 112.2 x 145.3 cm) - a compact footprint for a dual-function machine.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit Weight:\u003c\/strong\u003e 474 lbs (215 kg) - substantial, stable construction for a secure user experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eShips free! Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSportsArt DF-306 Back Extension\/Ab Crunch Machine\u003c\/li\u003e\n  \u003cli\u003e220 lb weight stack (20 x 11 lb \/ 5 kg plates)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy You'll Love It\u003c\/h2\u003e\n\u003cp\u003e\n  The DF-306 is trusted by fitness professionals and facility managers who demand commercial-grade performance without compromising on space or budget. By combining two core-focused exercises into one machine, it delivers exceptional value in any gym layout. SportsArt's engineering pedigree ensures this machine is built to withstand the demands of daily, high-volume use year after year. The low starting resistance makes it versatile enough for rehabilitation clients and beginners, while the deep weight stack satisfies even the most advanced athletes. If you're looking for a reliable, well-built dual-function core machine from a brand with a proven commercial track record, the DF-306 is an easy choice.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eView Product Specs\u003c\/strong\u003e\u003c\/summary\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eUnit Weight\u003c\/th\u003e\n\u003ctd\u003e474 lbs \/ 215 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (L x W x H)\u003c\/th\u003e\n\u003ctd\u003e44.6 x 44.1 x 57.2 in \/ 113.2 x 112.2 x 145.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight Stack\u003c\/th\u003e\n\u003ctd\u003e220 lbs \/ 100 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlate Increments\u003c\/th\u003e\n\u003ctd\u003e20 x 11 lbs (5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStarting Weight - Ab Crunch\u003c\/th\u003e\n\u003ctd\u003e7.7 lbs \/ 3.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStarting Weight - Back Extension\u003c\/th\u003e\n\u003ctd\u003e7.7 lbs \/ 3.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax User Weight\u003c\/th\u003e\n\u003ctd\u003e500 lbs \/ 227.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003ePerformance Series Strength - DF300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAssembly Required\u003c\/th\u003e\n\u003ctd\u003eYes - commercial installation recommended; ships via freight on a pallet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat exercises can I perform on the DF-306?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe DF-306 is designed for two core exercises: back extension and ab crunch. These two movements target opposing muscle groups - the lower back (erector spinae) and the abdominals - making it a highly efficient dual-function machine for core strength and stability training.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is the DF-306 shipped, and is assembly required?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eDue to its size and weight (474 lbs), the DF-306 ships via freight on a pallet. Delivery is typically curbside or to a loading dock. Professional installation is recommended for commercial environments. Please contact us at service@omahasportsandgames.com for specific delivery details and to schedule your delivery window.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this machine suitable for rehabilitation use?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eYes. With a starting resistance of just 7.7 lbs on both the ab crunch and back extension functions, the DF-306 is well-suited for rehabilitation settings, allowing users recovering from injuries to begin at very low loads and progress gradually. Always consult a medical professional before beginning any rehabilitation exercise program.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow does the dual-function direct drive system work?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe DF-306 uses a direct drive system with two opposing cams - one for each exercise direction. This design minimizes cable slack so the resistance feels smooth and consistent throughout the range of motion. It also allows users to switch between back extension and ab crunch quickly, reducing downtime between sets or transitions between users in a busy facility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the weight stack capacity, and is it enough for advanced users?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe machine comes with a 220 lb (100 kg) weight stack in 5 kg (11 lb) plate increments. This provides a broad progression range suitable for beginners through advanced athletes and is more than sufficient for the vast majority of core training applications in a commercial gym setting.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"video-wrapper\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/6h1GgES5DX4?rel=0\u0026amp;showinfo=0\u0026amp;enablejsapi=1\" frameborder=\"0\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n","brand":"SportsArt Fitness","offers":[{"title":"Default Title","offer_id":56228762419505,"sku":"10-6997","price":4895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/DF-306-Back-Extension-Ab-Cunch-web.png?v=1789148952","url":"https:\/\/omahasportsandgames.com\/products\/sportsart-df-306-performance-lower-back-ab-crunch-machine","provider":"Omaha Sports \u0026 Games","version":"1.0","type":"link"}