{"product_id":"built-strength-infinite-series-back-extension-new","title":"BUILT Strength Infinite Series Back Extension (New)","description":"\u003c!-- BUILT Strength Infinite Series Back Extension --\u003e\n\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 Infinite Series Back Extension pairs a fixed 45-degree platform with a \u003cstrong\u003e200 lb selectorized stack\u003c\/strong\u003e, so you can load the posterior chain far past bodyweight without waiting on plates. Adjustable-height thigh pads set the pivot at the hips for a clean hinge, while quilted leg rollers and thigh pads keep you locked in through every rep.\u003c\/p\u003e\n\u003cp class=\"bs-desc\"\u003eA D-clip attachment point accepts multiple handle styles — a straight bar is included — for weighted extensions that scale with the athlete, and a bar catch at the bottom keeps the bar within reach between sets. Fixed handlebars at the thigh pads assist entry and exit, and the textured flat and angled platforms deliver \u003cstrong\u003eno-slip traction\u003c\/strong\u003e on high-traffic commercial floors.\u003c\/p\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003ePrimary muscles targeted\u003c\/p\u003e\n\u003cdiv style=\"margin-bottom: 10px;\" class=\"bs-muscles\"\u003e\n\u003cspan class=\"bs-muscle-tag\"\u003eErector Spinae\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eGluteus Maximus\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eHamstrings\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"bs-section-label\"\u003e \u003c\/p\u003e\n\u003cp class=\"bs-section-label\"\u003eSecondary muscles\u003c\/p\u003e\n\u003cdiv style=\"margin-bottom: 0;\" class=\"bs-muscles\"\u003e\n\u003cspan class=\"bs-muscle-tag sec\"\u003eMultifidus\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag sec\"\u003eQuadratus Lumborum\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 y2=\"21\" x2=\"12\" y1=\"3\" x1=\"12\"\u003e\u003c\/line\u003e\u003cline y2=\"21\" x2=\"19\" y1=\"21\" x1=\"5\"\u003e\u003c\/line\u003e\u003crect rx=\"1.5\" height=\"3\" width=\"10\" y=\"6\" x=\"7\"\u003e\u003c\/rect\u003e\u003crect rx=\"1.5\" height=\"3\" width=\"8\" y=\"11\" x=\"8\"\u003e\u003c\/rect\u003e\u003crect rx=\"1.25\" height=\"2.5\" width=\"6\" y=\"16\" x=\"9\"\u003e\u003c\/rect\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003e200 lb selectorized stack\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003ePin-select resistance loads the posterior chain well beyond bodyweight for progressive strength work without swapping plates.\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\u003cline y2=\"6\" x2=\"20\" y1=\"6\" x1=\"4\"\u003e\u003c\/line\u003e\u003cline y2=\"12\" x2=\"20\" y1=\"12\" x1=\"4\"\u003e\u003c\/line\u003e\u003cline y2=\"18\" x2=\"20\" y1=\"18\" x1=\"4\"\u003e\u003c\/line\u003e\u003ccircle r=\"2\" cy=\"6\" cx=\"8\"\u003e\u003c\/circle\u003e\u003ccircle r=\"2\" cy=\"12\" cx=\"16\"\u003e\u003c\/circle\u003e\u003ccircle r=\"2\" cy=\"18\" cx=\"10\"\u003e\u003c\/circle\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003eAdjustable thigh pads\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eHeight-adjustable, quilted thigh pads and leg rollers set the hip pivot precisely and lock the lower body in for a clean hinge.\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 12c-2-2.5-4-4-6-4a4 4 0 0 0 0 8c2 0 4-1.5 6-4z\"\u003e\u003c\/path\u003e\u003cpath d=\"M12 12c2 2.5 4 4 6 4a4 4 0 0 0 0-8c-2 0-4 1.5-6 4z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003eD-clip attachment system\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eSwap in multiple handle styles at the D-clip for loaded extensions — a straight bar is included — with a bar catch that keeps it within reach between sets.\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\"\u003eNo-slip textured platforms\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eSturdy flat and fixed angled platforms with textured surfaces deliver secure footing, and fixed handlebars assist safe entry and exit.\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\" × 39\" × 62\"\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003e1219 × 991 × 1575 mm\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\"\u003e200 lb\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003e91 kg selectorized\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eResistance type\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003ePin-select stack\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003eIncremental weight changes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eThigh pads\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eHeight adjustable\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003eQuilted pads \u0026amp; leg rollers\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card bs-span2\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eAttachments\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eD-clip · straight bar included\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003eAccepts multiple handle styles · bar catch at base\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eFrame\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003e11-Gauge (3mm) Steel\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ============================================================\nSEO FIELDS — paste these into Shopify's Search Engine Listing section\n============================================================\n\nPage title (max 60 chars):\nBUILT Strength Back Extension | Selectorized 200 lb\n\nMeta description (max 155 chars):\nSelectorized 200 lb back extension with adjustable thigh pads, D-clip attachments, and textured no-slip platforms. Commercial-grade posterior chain training.\n\nTags (comma separated):\nback extension machine, selectorized back extension, BUILT Strength, Infinite Series, hyperextension, posterior chain, lower back machine, erector spinae, commercial gym equipment, 200 lb weight stack, glute ham, strength machine\n\n============================================================ --\u003e","brand":"BUILT Strength","offers":[{"title":"Default Title","offer_id":49489078321392,"sku":"BB021","price":3295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0510\/0981\/4682\/files\/210.png?v=1784663593","url":"https:\/\/www.buildagym.com\/es\/products\/built-strength-infinite-series-back-extension-new","provider":"Build A Gym","version":"1.0","type":"link"}