[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"catalog-machine-leg-extension-machine":3},{"id":4,"name":5,"slug":6,"description":7,"photoUrl":8,"photoUrls":9,"videoUrls":10,"manufacturerProfileEligible":11,"categories":12,"category":15,"exercises":19,"createdAt":41,"updatedAt":42},"25e25c6b-3292-5be7-ae03-e0e4be7c22ce","Leg Extension Machine","leg-extension-machine","Seated machine designed to purely isolate the front of the thighs, completely removing glutes and hamstrings from the movement.","https:\u002F\u002Fliftag-media-prod-997916278530-eu-central-1.s3.eu-central-1.amazonaws.com\u002Fcatalog\u002Fmachine-templates\u002Fleg-extension-machine\u002Fimages\u002Fleg-extension-machine_1.webp",[8],null,false,[13],{"id":14,"slug":15,"name":16,"sortOrder":17,"i18nKey":18},"73537600-fdf1-55cd-873f-232852ac0fda","quadriceps","Quadriceps",70,"routine.filters.quadriceps",[20],{"id":21,"slug":22,"imageUrl":23,"name":24,"description":25,"popularity":26,"aliases":27,"localeName":10,"isCompound":11,"loggingTypes":28,"createdByUserId":10,"isFavorited":11,"primaryCategory":30,"categories":31,"videos":33,"lastSessionSets":38,"createdAt":39,"updatedAt":40},"b4a530e4-d9a3-51ed-9834-6413d5cca016","machine-leg-extension","https:\u002F\u002Fliftag-media-prod-997916278530-eu-central-1.s3.eu-central-1.amazonaws.com\u002Fcatalog\u002Fexercise-templates\u002Fmachine-leg-extension\u002Fimages\u002Fmachine-leg-extension_1.webp","Machine Leg Extension","Adjust the backrest so the knees align with the machine’s pivot and position the shin pad above the ankles. Sit with back and pelvis supported, grip the handles, and extend the knees smoothly until the legs are straight or reach a comfortable endpoint. Pause, then lower the pad under control without letting the weight stack slam. The leg-extension machine isolates knee extension and trains all four quadriceps muscles; muscle burn or visible “separation” is not a technique goal. Use a load that permits controlled movement, keep the hips on the seat, and avoid kicking or forcefully locking the knees. Modify the range if the kneecap or joint becomes uncomfortable.",101,"quad",[29],"weight_reps",{"id":14,"slug":15,"name":16,"sortOrder":17,"i18nKey":18},[32],{"id":14,"slug":15,"name":16,"sortOrder":17,"i18nKey":18},[34],{"locale":35,"url":36,"displayOrder":37,"uploadedByUserId":10},"en","https:\u002F\u002Fliftag-media-997916278530-eu-central-1-an.s3.eu-central-1.amazonaws.com\u002Fcatalog\u002Fexercise-templates\u002Fmachine-leg-extension\u002Fvideos\u002F20260725T150833Z\u002Fmaster.m3u8",0,[],"2026-05-09T00:28:06.465+00:00","2026-08-07T11:03:37.735+00:00","2026-05-09T00:28:07.531+00:00","2026-06-05T00:31:50.191+00:00"]