{"product_id":"spirit-fitness-sp-3503-back-extension","title":"Spirit Fitness SP-3503 Back Extension","description":"\u003ch2 data-section-id=\"53drpp\" data-start=\"0\" data-end=\"21\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"22\" data-end=\"557\"\u003eThe Spirit Fitness SP-3503 Back Extension is a commercial-grade strength machine designed to strengthen the lower back and core through a controlled extension movement. Built to support proper spinal alignment and user stability, it features an ergonomic pad system and adjustable mechanics that accommodate a wide range of users. With smooth resistance, intuitive setup, and durable construction, the SP-3503 delivers safe, effective posterior chain training in modern fitness environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"22\" data-end=\"557\"\u003ePIN: SP-3503\u003c\/p\u003e\n\u003chr data-start=\"559\" data-end=\"562\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"564\" data-end=\"581\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"582\" data-end=\"1766\"\u003e\n\u003cli data-section-id=\"5m27gh\" data-start=\"582\" data-end=\"754\"\u003e\n\u003cstrong data-start=\"584\" data-end=\"613\"\u003eSelf-Adjusting Roller Pad\u003c\/strong\u003e\u003cbr data-start=\"613\" data-end=\"616\"\u003eAutomatically positions across the upper back for optimal alignment and comfort during movement. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1t06qhn\" data-start=\"756\" data-end=\"937\"\u003e\n\u003cstrong data-start=\"758\" data-end=\"788\"\u003eAdjustable Range of Motion\u003c\/strong\u003e\u003cbr data-start=\"788\" data-end=\"791\"\u003eAllows users to customize movement limits based on flexibility, training goals, or rehabilitation needs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"f0pz5r\" data-start=\"939\" data-end=\"1105\"\u003e\n\u003cstrong data-start=\"941\" data-end=\"976\"\u003eLower Body Stabilization System\u003c\/strong\u003e\u003cbr data-start=\"976\" data-end=\"979\"\u003eFoot bar support keeps the body secure, ensuring controlled and effective execution. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"5sedz\" data-start=\"1107\" data-end=\"1264\"\u003e\n\u003cstrong data-start=\"1109\" data-end=\"1137\"\u003eErgonomic Support Design\u003c\/strong\u003e\u003cbr data-start=\"1137\" data-end=\"1140\"\u003ePromotes proper spinal positioning while enabling a full and safe extension range. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"4m0qd\" data-start=\"1266\" data-end=\"1419\"\u003e\n\u003cstrong data-start=\"1268\" data-end=\"1302\"\u003eSmooth Cable-Driven Resistance\u003c\/strong\u003e\u003cbr data-start=\"1302\" data-end=\"1305\"\u003eProvides fluid, consistent motion for controlled and efficient training. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"aoi5cp\" data-start=\"1421\" data-end=\"1587\"\u003e\n\u003cstrong data-start=\"1423\" data-end=\"1457\"\u003eIntegrated Storage Convenience\u003c\/strong\u003e\u003cbr data-start=\"1457\" data-end=\"1460\"\u003eTop-mounted storage tray keeps essentials like phones and water bottles within reach. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"46k3jh\" data-start=\"1589\" data-end=\"1766\"\u003e\n\u003cstrong data-start=\"1591\" data-end=\"1624\"\u003eCommercial-Grade Construction\u003c\/strong\u003e\u003cbr data-start=\"1624\" data-end=\"1627\"\u003eHeavy-duty steel frame and premium upholstery ensure long-term durability in high-use facilities. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1768\" data-end=\"1771\"\u003e\n\u003ch2 data-section-id=\"1qhk4i3\" data-start=\"1773\" data-end=\"1792\"\u003eSpecifications\u003c\/h2\u003e\n\u003ch3 data-section-id=\"uuyzr2\" data-start=\"1794\" data-end=\"1811\"\u003ePerformance\u003c\/h3\u003e\n\u003cul data-start=\"1812\" data-end=\"2181\"\u003e\n\u003cli data-section-id=\"1b613ve\" data-start=\"1812\" data-end=\"1878\"\u003e\n\u003cstrong data-start=\"1814\" data-end=\"1832\"\u003eExercise Type:\u003c\/strong\u003e Back extension (lower back \u0026amp; core training)\u003c\/li\u003e\n\u003cli data-section-id=\"cclwfx\" data-start=\"1879\" data-end=\"1931\"\u003e\n\u003cstrong data-start=\"1881\" data-end=\"1903\"\u003eResistance System:\u003c\/strong\u003e Selectorized weight stack\u003c\/li\u003e\n\u003cli data-section-id=\"1drhzh3\" data-start=\"1932\" data-end=\"1969\"\u003e\n\u003cstrong data-start=\"1934\" data-end=\"1951\"\u003eWeight Stack:\u003c\/strong\u003e 110 kg \/ 240 lb\u003c\/li\u003e\n\u003cli data-section-id=\"17cdk66\" data-start=\"1970\" data-end=\"2044\"\u003e\n\u003cstrong data-start=\"1972\" data-end=\"1986\"\u003eIncrement:\u003c\/strong\u003e 7.5 lb increments \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"153xpf2\" data-start=\"2045\" data-end=\"2116\"\u003e\n\u003cstrong data-start=\"2047\" data-end=\"2060\"\u003eMovement:\u003c\/strong\u003e Cable-driven system for smooth, controlled resistance\u003c\/li\u003e\n\u003cli data-section-id=\"gayo4j\" data-start=\"2117\" data-end=\"2181\"\u003e\n\u003cstrong data-start=\"2119\" data-end=\"2138\"\u003eTarget Muscles:\u003c\/strong\u003e Lower back, glutes, and core stabilizers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"skaw84\" data-start=\"2188\" data-end=\"2208\"\u003eDesign \u0026amp; Build\u003c\/h3\u003e\n\u003cul data-start=\"2209\" data-end=\"2612\"\u003e\n\u003cli data-section-id=\"1g8heaa\" data-start=\"2209\" data-end=\"2257\"\u003e\n\u003cstrong data-start=\"2211\" data-end=\"2221\"\u003eFrame:\u003c\/strong\u003e Heavy-duty commercial-grade steel\u003c\/li\u003e\n\u003cli data-section-id=\"wyindf\" data-start=\"2258\" data-end=\"2303\"\u003e\n\u003cstrong data-start=\"2260\" data-end=\"2271\"\u003eFinish:\u003c\/strong\u003e Durable powder-coated surface\u003c\/li\u003e\n\u003cli data-section-id=\"10af5ip\" data-start=\"2304\" data-end=\"2372\"\u003e\n\u003cstrong data-start=\"2306\" data-end=\"2315\"\u003ePads:\u003c\/strong\u003e Self-adjusting upper roller pad with ergonomic support\u003c\/li\u003e\n\u003cli data-section-id=\"xwo8i7\" data-start=\"2373\" data-end=\"2431\"\u003e\n\u003cstrong data-start=\"2375\" data-end=\"2393\"\u003eStabilization:\u003c\/strong\u003e Foot bar for lower body positioning\u003c\/li\u003e\n\u003cli data-section-id=\"1uu3j31\" data-start=\"2432\" data-end=\"2484\"\u003e\n\u003cstrong data-start=\"2434\" data-end=\"2448\"\u003eMechanics:\u003c\/strong\u003e Adjustable range-of-motion system\u003c\/li\u003e\n\u003cli data-section-id=\"sk9bs5\" data-start=\"2485\" data-end=\"2546\"\u003e\n\u003cstrong data-start=\"2487\" data-end=\"2502\"\u003eCushioning:\u003c\/strong\u003e High-density foam with durable upholstery\u003c\/li\u003e\n\u003cli data-section-id=\"1obdwgi\" data-start=\"2547\" data-end=\"2612\"\u003e\n\u003cstrong data-start=\"2549\" data-end=\"2574\"\u003eConvenience Features:\u003c\/strong\u003e Storage tray, enclosed weight stack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1tz1b13\" data-start=\"2619\" data-end=\"2646\"\u003eDimensions \u0026amp; Capacity\u003c\/h3\u003e\n\u003cul data-start=\"2647\" data-end=\"3079\"\u003e\n\u003cli data-section-id=\"t2xfmc\" data-start=\"2647\" data-end=\"2756\"\u003e\n\u003cstrong data-start=\"2649\" data-end=\"2676\"\u003eDimensions (L × W × H):\u003c\/strong\u003e 1057 × 1298 × 1592 mm (42\" × 51\" × 63\") \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"4okkud\" data-start=\"2757\" data-end=\"2836\"\u003e\n\u003cstrong data-start=\"2759\" data-end=\"2778\"\u003eMachine Weight:\u003c\/strong\u003e 251 kg \/ 554 lb \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1golcve\" data-start=\"2837\" data-end=\"2914\"\u003e\n\u003cstrong data-start=\"2839\" data-end=\"2856\"\u003eWeight Stack:\u003c\/strong\u003e 110 kg \/ 240 lb \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8ljg97\" data-start=\"2915\" data-end=\"3003\"\u003e\n\u003cstrong data-start=\"2917\" data-end=\"2945\"\u003eMaximum Selectable Load:\u003c\/strong\u003e 110 kg \/ 243 lb \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vu554n\" data-start=\"3004\" data-end=\"3079\"\u003e\n\u003cstrong data-start=\"3006\" data-end=\"3020\"\u003eFootprint:\u003c\/strong\u003e Compact commercial design suitable for strength circuits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spirit Fitness","offers":[{"title":"Default Title","offer_id":53015599284521,"sku":"SP-3503","price":0.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0845\/7430\/6601\/files\/Screenshot2026-04-20161113.png?v=1776687105","url":"https:\/\/wellnessfirst.com\/ar-kw\/products\/spirit-fitness-sp-3503-back-extension","provider":"Wellness First","version":"1.0","type":"link"}