{"product_id":"precor-discovery-series-back-extension-remanufactured","title":"Precor Discovery Series Back Extension (Remanufactured)","description":"\u003cstyle\u003e\n  .bs-wrap *{box-sizing:border-box;margin:0;padding:0}\n  .bs-wrap{font-family:'Barlow',sans-serif;color:#1a1a1a;max-width:700px}\n  .bs-badge{display:inline-block;background:#1a1a1a;color:#f0ebe3;font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;padding:4px 10px;border-radius:3px;margin-bottom:16px}\n  .bs-desc{font-size:15px;line-height:1.8;color:#444;margin-bottom:24px}\n  .bs-desc strong{color:#1a1a1a;font-weight:500}\n  .bs-divider{border:none;border-top:1px solid #e5e5e5;margin:24px 0}\n  .bs-section-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#999;font-weight:500;margin-bottom:12px}\n  .bs-muscles{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}\n  .bs-muscle-tag{font-size:12px;font-weight:500;padding:5px 13px;border-radius:20px;background:#fff7ed;color:#92400e;border:1px solid #fcd9a0}\n  .bs-muscle-tag.sec{background:#f5f5f5;color:#666;border-color:#e0e0e0}\n  .bs-specs-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:24px}\n  .bs-spec-card{background:#f7f7f5;border-radius:8px;padding:14px 16px}\n  .bs-spec-label{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#999;margin-bottom:4px}\n  .bs-spec-val{font-family:'Barlow Condensed',sans-serif;font-size:20px;font-weight:600;color:#1a1a1a}\n  .bs-spec-sub{font-size:12px;color:#888;margin-top:3px}\n  .bs-feat{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-top:1px solid #efefef}\n  .bs-feat:last-child{border-bottom:1px solid #efefef}\n  .bs-feat-icon{width:30px;height:30px;border-radius:50%;background:#fff0f0;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}\n  .bs-feat-icon svg{width:14px;height:14px;stroke:#dc2626;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}\n  .bs-feat-name{font-size:14px;font-weight:500;color:#1a1a1a;margin-bottom:3px}\n  .bs-feat-desc{font-size:13px;color:#666;line-height:1.6}\n  .bs-span2{grid-column:span 2}\n\u003c\/style\u003e\n\u003cdiv class=\"bs-wrap\"\u003e\n\u003cp class=\"bs-desc\"\u003eThe Precor Discovery Series Back Extension Machine delivers \u003cstrong\u003eselectorized isolated lumbar training with a contoured back pad, adjustable start position, integrated footplate, and precision weight stack resistance — 488 lb commercial Discovery frame, 48\"×43\" footprint\u003c\/strong\u003e. The selectorized back extension machine is the controlled-resistance alternative to the bodyweight Roman chair or 45° hyperextension bench: where the bodyweight versions load the erector spinae with a fixed percentage of the user's own bodyweight determined by their position on the pad, the selectorized machine applies a precisely calibrated resistance from the weight stack that is independent of the user's body weight. This makes progressive loading straightforward — add a plate increment to the stack each session — rather than requiring the user to add a weighted plate to their chest or behind their head, which introduces a secondary loading challenge and a spinal compression component that is not present when the resistance comes from a cable stack. The adjustable start position accommodates users whose lumbar flexion range varies due to flexibility, injury history, or rehabilitation stage — setting the start point to the user's comfortable beginning angle means the full effective extension arc is covered without forcing the user into a flexion depth that exceeds their safe range. The integrated footplate provides secure anchoring throughout the extension movement, preventing the hip and pelvis from lifting off the pad at the top of the extension range — a compensation that shifts load from the lumbar extensors into the glutes and hamstrings and reduces the isolation benefit.\u003c\/p\u003e\n\u003cp class=\"bs-desc\"\u003eErgonomically contoured back pad for comfort and spinal support throughout the extension range. \u003cstrong\u003e488 lb Precor Discovery commercial back extension frame\u003c\/strong\u003e, 48\"×43\" footprint. Contact us for stack specifications. Remanufactured.\u003c\/p\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003ePrimary muscles targeted\u003c\/p\u003e\n\u003cdiv class=\"bs-muscles\" style=\"margin-bottom: 10px;\"\u003e\n\u003cspan class=\"bs-muscle-tag\"\u003eErector Spinae\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eMultifidus\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eGluteus Maximus\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"bs-section-label\"\u003eSecondary muscles\u003c\/p\u003e\n\u003cdiv class=\"bs-muscles\" style=\"margin-bottom: 0;\"\u003e\n\u003cspan class=\"bs-muscle-tag sec\"\u003eHamstrings\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag sec\"\u003eQuadratus Lumborum\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag sec\"\u003eCore Stabilizers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003eKey features\u003c\/p\u003e\n\u003cdiv class=\"bs-feat\"\u003e\n\u003cdiv class=\"bs-feat-icon\"\u003e\u003csvg viewbox=\"0 0 24 24\"\u003e\u003cline x1=\"4\" y1=\"6\" x2=\"14\" y2=\"6\"\u003e\u003c\/line\u003e\u003ccircle cx=\"18\" cy=\"6\" r=\"2\"\u003e\u003c\/circle\u003e\u003cline x1=\"4\" y1=\"12\" x2=\"20\" y2=\"12\"\u003e\u003c\/line\u003e\u003cline x1=\"4\" y1=\"18\" x2=\"14\" y2=\"18\"\u003e\u003c\/line\u003e\u003ccircle cx=\"18\" cy=\"18\" r=\"2\"\u003e\u003c\/circle\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003eSelectorized Stack · Adjustable Start — Progressive Loading Without Body Weight Dependency\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eSelectorized resistance loads the lumbar extensors from the weight stack rather than from body weight — progressive overload by adding stack increments each session rather than holding weighted plates against the chest. Adjustable start position sets the beginning flexion angle to each user's comfortable range, covering the full productive extension arc without forcing users into a depth that exceeds their safe or comfortable lumbar flexion.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-feat\"\u003e\n\u003cdiv class=\"bs-feat-icon\"\u003e\u003csvg viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 2l8 4v6c0 5-4 9-8 10-4-1-8-5-8-10V6l8-4z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003eIntegrated Footplate · Contoured Back Pad · 488 lb Frame\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eIntegrated footplate anchors the hip and pelvis throughout the extension arc — preventing hip lift at the top of the extension range that shifts load from the lumbar extensors into the glutes and hamstrings, reducing the isolation benefit. Ergonomically contoured back pad provides support and comfort throughout the range of motion. 488 lb Discovery commercial frame for long-term high-traffic durability.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003eSpecifications\u003c\/p\u003e\n\u003cdiv class=\"bs-specs-grid\"\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eDimensions (L × W × H)\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003e48\" × 43\" × 59\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eMachine Weight\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003e488 lb\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eWeight Stack\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eContact Us\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003eAdj. start position · Footplate · Contoured back pad\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eCondition\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eRemanufactured\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003ePrecor Discovery · \u003ca href=\"https:\/\/ctxhomegyms.com\/pages\/what-is-refurbished\" style=\"color: #888; text-decoration: underline;\"\u003eView condition details\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card bs-span2\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eDesign\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eSelectorized · Adj. Start · Footplate · 488 lb\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003eSelectorized weight stack · Adjustable start position · Integrated footplate · Contoured back pad · Heavy-duty Discovery frame · 488 lb · 48\"×43\" footprint\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ============================================================\nSEO FIELDS — paste into Shopify's Search Engine Listing section\n============================================================\n\nPage title (max 60 chars):\nPrecor Discovery Back Extension Machine | Remfg\n\nMeta description (max 160 chars):\nRemanufactured Precor Discovery Back Extension. Selectorized stack, adjustable start, footplate, 488 lb commercial lumbar extension machine, 48×43\" footprint.\n\nTags (comma separated):\nPrecor Discovery back extension, Precor back extension remanufactured, selectorized back extension, adjustable start back extension, lumbar extension machine, erector spinae machine, commercial back extension, 488lb back extension, Precor Discovery selectorized, remanufactured back extension\n\n============================================================ --\u003e","brand":"Precor","offers":[{"title":"Default Title","offer_id":47608148099312,"sku":"PRE-D-BE","price":1095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0510\/0981\/4682\/files\/155-01-reman-transparent-white-2048_545a1de4-36cb-4346-83fe-14d5093eabe0.png?v=1787181777","url":"https:\/\/www.buildagym.com\/es\/products\/precor-discovery-series-back-extension-remanufactured","provider":"Build A Gym","version":"1.0","type":"link"}