Bodytone Forza FB53 seated leg curl with 107 kg stack

The Forza FB53 is a seated leg curl with a 107 kg stack on a 149 by 103 cm footprint, weighing 95 kg before the plates are counted. It is the narrower of the two hamstring stations in the Forza line, which is what makes it practical in rooms where the leg area is already crowded.

Seated knee flexion isolates the hamstring group with the hip flexed, loading semitendinosus, semimembranosus and biceps femoris through a range that a free weight cannot reproduce. The seated position also fixes the pelvis against the backrest, so the movement stays at the knee instead of drifting into the lower back, which is the usual failure on unsupervised hamstring work.

Construction follows the Forza standard: carbon steel tube frame with a 2.5 mm wall, robot welded, stainless steel guide rods with a double hard chrome treatment, V grooved nylon pulleys on internal bearings and PVC coated 5 mm steel cable tested to 1000 kg. Plates are colour coded by load and selected magnetically. The frame carries a three coat epoxy polyester powder finish cured at 240 degrees Celsius, and ABS shrouds close the mechanism. An optional console kit adds a 9 inch Android screen with NFC connection.

Technical specification

Correcting the knee extension bias

Most gym floors carry more knee extension capacity than knee flexion, and the imbalance is visible in hamstring injury rates in field sports. A seated leg curl is the cheapest correction available, and it needs no coaching beyond setting the backrest and the ankle pad.

The station is 103 cm wide, so it lines up in a row of leg machines rather than requiring an island position. Allow access on the loading flank and space in front for the user to sit. A siting plan with clearances is issued with the quotation once we have your room drawing. We deliver to France, Belgium, Switzerland and Luxembourg, quote export per project, and dispatch within five to ten working days from stock.

Frequently asked questions

How does it differ from a prone leg curl?

The hip position. Seated, the hip is flexed and the hamstrings start longer at the hip end; prone, the hip is extended and the work is concentrated at the knee. Programmes that emphasise sprinting usually want both available.

Do the colour coded plates serve a purpose?

They make load selection quick to read across a busy floor and help coaches prescribe a setting without checking a chart at the machine.

Can the load start low enough for rehabilitation?

Yes, selection runs from a single plate. Confirm the loading and permitted range with the practitioner responsible for the patient.