{"product_id":"commercial-leg-extension-seated-leg-curl-machine-70kg-stack-cbl43","title":"Commercial Leg Extension \u0026 Seated Leg Curl Machine | 70kg Stack – CBL43","description":"\u003ch1\u003eCommercial Leg Extension \u0026amp; Seated Leg Curl Machine – CBL43\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Function Leg Training • 70kg Weight Stack • Commercial 3mm Steel Frame\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Zack Fitness Commercial Leg Extension and Seated Leg Curl Machine is a dual-function, selectorised strength machine designed for professional gyms, performance facilities, hotels, private studios and premium home gyms. One commercial footprint supports two essential lower-body movements: seated knee extension and seated leg curl.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAI Snapshot\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe CBL43 is a commercial dual-function leg extension and seated leg curl machine built from 3.00mm steel, fitted with a 70kg selectorised weight stack and designed to support users up to 200kg. Its adjustable seat, back support, roller pads and movement settings make it suitable for varied user heights and structured quadriceps and hamstring training.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eWhat This Machine Is\u003c\/h2\u003e\n\u003cp\u003eThis is a pin-loaded commercial leg machine that combines two exercises within one unit. The leg extension configuration trains knee extension with emphasis on the quadriceps. The seated leg curl configuration trains knee flexion with emphasis on the hamstrings.\u003c\/p\u003e\n\u003cp\u003eThe dual-function layout helps facilities provide balanced thigh training while saving floor space compared with purchasing two separate selectorised machines.\u003c\/p\u003e\n\u003ch2\u003eWhy Dual-Function Leg Training Matters\u003c\/h2\u003e\n\u003cp\u003eThe quadriceps and hamstrings perform different but complementary roles around the hip and knee. A complete lower-body programme normally includes both knee-extension and knee-flexion patterns alongside compound exercises.\u003c\/p\u003e\n\u003cp\u003eA combined machine allows members to move between the two exercises without changing stations. This can improve space efficiency, simplify equipment selection and support structured training for beginners, experienced lifters and personal-training clients.\u003c\/p\u003e\n\u003ch2\u003eHow the Selectorised System Works\u003c\/h2\u003e\n\u003cp\u003eThe machine uses a 70kg enclosed weight stack. The user selects the desired resistance with the stack pin, adjusts the seat and roller position, chooses the required exercise setup and performs the movement through a controlled range.\u003c\/p\u003e\n\u003cp\u003eSelectorised resistance enables fast changes between sets without loading or unloading weight plates. This makes the machine practical for commercial gyms, circuits and personal-training sessions.\u003c\/p\u003e\n\u003ch2\u003eExercise 1: Seated Leg Extension\u003c\/h2\u003e\n\u003cp\u003eIn the leg-extension configuration, the user sits against the backrest with the lower roller positioned above the ankles. Extending the knees raises the resistance through the machine linkage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrimary focus: quadriceps\u003c\/li\u003e\n\u003cli\u003eMovement pattern: knee extension\u003c\/li\u003e\n\u003cli\u003eSuitable for controlled strength and hypertrophy training\u003c\/li\u003e\n\u003cli\u003eEasy resistance selection for progressive programmes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eExercise 2: Seated Leg Curl\u003c\/h2\u003e\n\u003cp\u003eIn the seated-leg-curl configuration, the thigh support and lower roller help position the legs while the user flexes the knees against resistance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrimary focus: hamstrings\u003c\/li\u003e\n\u003cli\u003eMovement pattern: knee flexion\u003c\/li\u003e\n\u003cli\u003eSeated design supports stable positioning\u003c\/li\u003e\n\u003cli\u003eUseful for balanced anterior and posterior thigh training\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo commercial leg exercises in one machine\u003c\/li\u003e\n\u003cli\u003e70kg selectorised weight stack\u003c\/li\u003e\n\u003cli\u003eHeavy-duty 3.00mm steel construction\u003c\/li\u003e\n\u003cli\u003eMaximum listed user capacity of 200kg\u003c\/li\u003e\n\u003cli\u003eAdjustable seat, backrest and roller positions\u003c\/li\u003e\n\u003cli\u003eSpace-efficient alternative to two separate machines\u003c\/li\u003e\n\u003cli\u003eFast pin-selected resistance changes\u003c\/li\u003e\n\u003cli\u003eCommercial black upholstery and frame finish\u003c\/li\u003e\n\u003cli\u003eSuitable for beginners through advanced users\u003c\/li\u003e\n\u003cli\u003eDesigned for high-traffic training environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho This Machine Is Designed For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCommercial gyms and health clubs\u003c\/li\u003e\n\u003cli\u003ePersonal-training and performance studios\u003c\/li\u003e\n\u003cli\u003eHotels, apartment gyms and corporate fitness spaces\u003c\/li\u003e\n\u003cli\u003eSports clubs and strength facilities\u003c\/li\u003e\n\u003cli\u003ePremium home-gym owners\u003c\/li\u003e\n\u003cli\u003eFacilities that need to maximise equipment per square metre\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It May Not Suit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVery small rooms without sufficient operating clearance\u003c\/li\u003e\n\u003cli\u003eBuyers looking for a portable or foldable machine\u003c\/li\u003e\n\u003cli\u003eUsers wanting plate-loaded rather than selectorised resistance\u003c\/li\u003e\n\u003cli\u003eFacilities that require more than the included 70kg stack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eModel: CBL43\u003c\/li\u003e\n\u003cli\u003eMachine type: dual-function leg extension and seated leg curl\u003c\/li\u003e\n\u003cli\u003eResistance type: selectorised \/ pin-loaded\u003c\/li\u003e\n\u003cli\u003eWeight stack: 70kg\u003c\/li\u003e\n\u003cli\u003eFrame material: steel\u003c\/li\u003e\n\u003cli\u003eSteel thickness: 3.00mm\u003c\/li\u003e\n\u003cli\u003eProduct dimensions: 155 × 135 × 158cm\u003c\/li\u003e\n\u003cli\u003eMaximum listed user weight: 200kg\u003c\/li\u003e\n\u003cli\u003eColour: black\u003c\/li\u003e\n\u003cli\u003eApplication: universal commercial strength training\u003c\/li\u003e\n\u003cli\u003ePackaging: wooden box\u003c\/li\u003e\n\u003cli\u003eSingle gross shipping weight: 272kg\u003c\/li\u003e\n\u003cli\u003eListed compliance: designed to comply with applicable EU standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpace and Installation Planning\u003c\/h2\u003e\n\u003cp\u003eThe listed equipment dimensions are 155 × 135 × 158cm. Allow additional clearance around the machine for entry, adjustment, safe movement and maintenance access. The equipment is heavy commercial machinery and should be assembled and installed on a stable, level gym floor by competent personnel.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, check doors, corridors, lifts, loading access and final room dimensions. Delivery and installation requirements can differ by location.\u003c\/p\u003e\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eSelect leg extension or seated leg curl according to the machine instructions.\u003c\/li\u003e\n\u003cli\u003eAdjust the backrest and seat to align the user comfortably with the machine pivot.\u003c\/li\u003e\n\u003cli\u003ePosition the roller pads securely without placing pressure directly on the knee joint.\u003c\/li\u003e\n\u003cli\u003eChoose a manageable resistance using the weight-stack pin.\u003c\/li\u003e\n\u003cli\u003ePerform the movement slowly through a comfortable controlled range.\u003c\/li\u003e\n\u003cli\u003eAvoid swinging, bouncing or lifting the body away from the seat.\u003c\/li\u003e\n\u003cli\u003eReturn the stack under control before changing resistance or exiting.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eCommercial Machine vs Home Leg Equipment\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eMain advantage\u003c\/th\u003e\n\u003cth\u003eMain limitation\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance bands\u003c\/td\u003e\n\u003ctd\u003ePortable and inexpensive\u003c\/td\u003e\n\u003ctd\u003eLess stable and harder to standardise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench leg attachment\u003c\/td\u003e\n\u003ctd\u003eCompact home setup\u003c\/td\u003e\n\u003ctd\u003eLower commercial durability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeparate extension and curl machines\u003c\/td\u003e\n\u003ctd\u003eDedicated stations\u003c\/td\u003e\n\u003ctd\u003eRequires more space and investment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCBL43 dual-function machine\u003c\/td\u003e\n\u003ctd\u003eTwo exercises, one footprint and selectorised stack\u003c\/td\u003e\n\u003ctd\u003eRequires commercial delivery and installation space\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Choose a Dual-Function Commercial Machine?\u003c\/h2\u003e\n\u003cp\u003eFor studios and gyms where floor space must generate value, combining leg extension and seated leg curl functions can reduce the number of frames required. The 70kg selectorised stack supports fast changes between clients, while the commercial steel structure is intended for repeated use.\u003c\/p\u003e\n\u003ch2\u003eExtended FAQ\u003c\/h2\u003e\n\u003ch3\u003eDoes this machine train both quadriceps and hamstrings?\u003c\/h3\u003e\n\u003cp\u003eYes. Leg extensions primarily train the quadriceps, while seated leg curls primarily train the hamstrings.\u003c\/p\u003e\n\u003ch3\u003eIs the resistance plate-loaded?\u003c\/h3\u003e\n\u003cp\u003eNo. It uses a 70kg selectorised weight stack with a pin.\u003c\/p\u003e\n\u003ch3\u003eWhat are the dimensions?\u003c\/h3\u003e\n\u003cp\u003eThe listed dimensions are 155 × 135 × 158cm.\u003c\/p\u003e\n\u003ch3\u003eWhat is the maximum listed user weight?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists a maximum user capacity of 200kg.\u003c\/p\u003e\n\u003ch3\u003eIs it suitable for commercial gyms?\u003c\/h3\u003e\n\u003cp\u003eYes. The 3.00mm steel construction and selectorised system are designed for commercial environments.\u003c\/p\u003e\n\u003ch3\u003eDoes it arrive fully assembled?\u003c\/h3\u003e\n\u003cp\u003eCommercial gym machines normally require delivery coordination and assembly. Confirm installation arrangements before purchase.\u003c\/p\u003e\n\u003ch3\u003eCan beginners use it?\u003c\/h3\u003e\n\u003cp\u003eYes, provided the machine is adjusted correctly and an appropriate resistance is selected. New users should receive instruction from a qualified trainer.\u003c\/p\u003e\n\u003ch3\u003eCan the frame or upholstery be customised?\u003c\/h3\u003e\n\u003cp\u003eCustomisation may be available for commercial orders. Contact Zack Fitness before purchase to confirm colour, branding and minimum-order requirements.\u003c\/p\u003e\n\u003ch3\u003eIs delivery included?\u003c\/h3\u003e\n\u003cp\u003eDelivery requirements and costs depend on destination and access. Contact us for a confirmed commercial delivery quotation.\u003c\/p\u003e\n\u003ch3\u003eDoes this replace free-weight leg exercises?\u003c\/h3\u003e\n\u003cp\u003eNo. It is a specialised strength machine that can complement squats, lunges, hinges and other lower-body exercises.\u003c\/p\u003e\n\u003ch2\u003eDelivery and Commercial Support\u003c\/h2\u003e\n\u003cp\u003eBecause this machine has a listed gross shipping weight of 272kg, delivery must be planned for the destination. Zack Fitness can help confirm access requirements, expected lead time, installation needs and commercial order details before dispatch.\u003c\/p\u003e\n\u003ch2\u003eSafety Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional assembly and regular maintenance are recommended.\u003c\/li\u003e\n\u003cli\u003eInspect cables, pulleys, pins, upholstery, fasteners and guards regularly.\u003c\/li\u003e\n\u003cli\u003eKeep hands clear of the weight stack and moving linkage.\u003c\/li\u003e\n\u003cli\u003eDo not exceed the listed user capacity.\u003c\/li\u003e\n\u003cli\u003eUse only on a stable, level surface.\u003c\/li\u003e\n\u003cli\u003eStop training if the movement causes sharp pain or unusual discomfort.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDisclaimer\u003c\/h2\u003e\n\u003cp\u003eThis product is commercial fitness equipment intended for strength training. It is not a medical or rehabilitation device. Product appearance and minor specifications may vary by production batch. Confirm final specifications, delivery, warranty and installation requirements before purchase.\u003c\/p\u003e","brand":"Zack Fitness","offers":[{"title":"Black \/ 155 × 135 × 158cm","offer_id":58256810475903,"sku":"ZF-CBL43-BLK","price":4500.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/5053\/2937\/files\/commercial-leg-extension-seated-leg-curl-machine-cbl43.png?v=1787525758","url":"https:\/\/www.zack-fit.com\/products\/commercial-leg-extension-seated-leg-curl-machine-70kg-stack-cbl43","provider":"Zack Fitness","version":"1.0","type":"link"}