{"id":36252,"date":"2026-04-23T17:38:06","date_gmt":"2026-04-23T15:38:06","guid":{"rendered":"https:\/\/www.spartfitness.it\/product\/back-extension-weight-stack\/"},"modified":"2026-07-17T17:21:21","modified_gmt":"2026-07-17T15:21:21","slug":"back-extension-weight-stack","status":"publish","type":"product","link":"https:\/\/www.spartfitness.it\/en\/product\/back-extension-weight-stack\/","title":{"rendered":"Back Extension Weight Stack"},"content":{"rendered":"<p data-path-to-node=\"5\">The <b data-path-to-node=\"5\" data-index-in-node=\"22\">Back Extension Weight Stack<\/b> is a professional machine designed for targeted strengthening of the spinal erectors and the posterior chain. Thanks to its precision biomechanics, it allows for torso extension movements with a fluid trajectory that respects the physiology of the lumbar region. The integrated weight stack makes load selection easy, making the equipment perfect for users of all levels, from beginners to advanced athletes.  <\/p>\n<h4 data-path-to-node=\"6\"><b data-path-to-node=\"6\" data-index-in-node=\"0\">Ergonomic Support and Stability<\/b><\/h4>\n<p data-path-to-node=\"7\">The effectiveness of the <b data-path-to-node=\"7\" data-index-in-node=\"18\">Back Extension Weight Stack<\/b> is guaranteed by the large padded support cushion, designed to offer a comfortable and stable pushing surface. The angled footplate is coated with non-slip material, ensuring a solid and secure stance throughout the set. Integrated side handles provide an additional stability point for the hands, helping the user focus all effort on the target muscles without motor compensation.  <\/p>\n<h4 data-path-to-node=\"8\"><b data-path-to-node=\"8\" data-index-in-node=\"0\">Isotonic Technology and Safety<\/b><\/h4>\n<p data-path-to-node=\"9\">The weight stack system of the <b data-path-to-node=\"9\" data-index-in-node=\"40\">Back Extension Weight Stack<\/b> ensures constant tension throughout the entire range of motion. Transmission is handled by high-resistance steel cables running on pulleys for total fluidity. With a design coordinated with the rest of the line, it is the ideal complement to machines like the <a href=\"https:\/\/www.spartfitness.it\/en\/product\/belt-squat\/\"><b data-path-to-node=\"9\" data-index-in-node=\"470\">[Belt Squat PB0412]<\/b><\/a> for complete core strength training.  <\/p>\n<p data-path-to-node=\"10\"><b data-path-to-node=\"10\" data-index-in-node=\"0\">Technical Specifications<\/b><\/p>\n<ul data-path-to-node=\"11\">\n<li>\n<p data-path-to-node=\"11,0,0\"><b data-path-to-node=\"11,0,0\" data-index-in-node=\"0\">Load System:<\/b> Weight stack with quick selector.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,1,0\"><b data-path-to-node=\"11,1,0\" data-index-in-node=\"0\">Supports:<\/b> High-density foam cushions with eco-leather upholstery.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,2,0\"><b data-path-to-node=\"11,2,0\" data-index-in-node=\"0\">Transmission:<\/b> Professional high-resistance cables for silent movement.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,3,0\"><b data-path-to-node=\"11,3,0\" data-index-in-node=\"0\">Base:<\/b> Non-slip footplate with ergonomic angling.<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Professional Back Extension machine with weight stack for lower back strengthening. Ergonomic design with large push cushion, non-slip footplate, and stabilizing handles. Ideal for safe and fluid posterior chain training.  <\/p>\n","protected":false},"featured_media":36130,"template":"","meta":{"_acf_changed":false},"product_cat":[3196,911,630],"product_tag":[1933,3082,3086,3002,3083,3084,3087,3081,3085,1233,2441],"class_list":{"0":"post-36252","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-power-booty","7":"product_cat-attrezzi-palestra-en","8":"product_cat-macchinari-da-palestra-en","9":"product_tag-attrezzatura-professionale","10":"product_tag-back-extension","11":"product_tag-back-strengthening","12":"product_tag-core-training-2","13":"product_tag-lumbar-extensions","14":"product_tag-pb-series","15":"product_tag-pb1514","16":"product_tag-posterior-chain","17":"product_tag-power-booty-line","18":"product_tag-spart-fitness","19":"product_tag-weight-stack","21":"first","22":"instock","23":"shipping-taxable","24":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Back Extension Weight Stack PB1514 Lower Back | Spart<\/title>\n<meta name=\"description\" content=\"Back Extension PB1514: lower back and glute strengthening with weight stack. 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