Home gym cable machine: types, pulley ratios, space and what to check before you buy

What is a home cable machine?

A cable machine, sometimes called a functional trainer, is a frame with one or more cables running over pulleys to a handle, strap or bar. You pull, push or press against the cable, and a source of resistance pulls back. The source can be a weight stack, plates or a motor.

Why do people choose one for the home? The Model I page makes a claim for the cable: it provides constant tension with guided paths, while free weights need storage and spotting for heavy lifts.¹ That is a maker's view and not independent research. We did not read a British or PubMed comparison of cables with free weights, so we do not claim one is better.

What the official guidance cares about is the activity, not the kit. The UK Chief Medical Officers (CMOs) say strengthening can use bodyweight, free weights, resistance machines or elastic bands, and that adults should do strengthening activities on at least 2 days a week.⁷ The NHS says muscle strengthening can be done at home or in a gym.⁶ Arthritis UK adds that you do not need weights or a gym membership to work on your strength.⁸

So a cable machine is one option among several, and the cheapest route is still a chair, a wall and a pair of water bottles. If that is where you are, start with how to start strength training and strength training at home, then come back here when you want to add load in small steps.

Types: weight stack, plate-loaded, motorised and wall-mounted

Four words describe most home machines. The table sets out the ones we could read on UK maker or storefront pages. Plate-loaded machines, which use weight plates, are common, but we did not read a British maker page for one, so that row is empty by design.

A weight stack is a column of plates you select with a pin. A motorised machine replaces the stack with a motor that creates resistance on demand, so the load can change in smaller steps and without plates. A wall-mounted unit fixes to the wall and frees floor space when not in use.

Each choice has trade-offs. Stacks need a frame or a wall and a certain depth. Motorised machines depend on their app, power and software. The Gym Monster 3 Core package is described as having no mandatory subscription and a 2-year warranty,⁴ but we did not read a subscription or warranty statement for the other machines in the table, so ask the maker.

Pulley ratios and what the numbers mean

A pulley ratio tells you how the stack weight compares with the load you feel. On the REP Fitness pages the ratio is 2:1, and the Athena page puts it plainly: 20 lb feels like 10 lb.³ The ratio is stated on those two pages only. Do not assume every cable machine is 2:1, and do not assume a motorised machine has a ratio at all, because the Model I page does not give one.¹

Here is the arithmetic, with a metric example. Suppose a stack weighs 45 kg and the ratio is 2:1. The feel at the handle is 45 ÷ 2 = 22.5 kg. In pounds, 22.5 × 2.20462 = 49.6 lb. This is our example to show how the sum works. Confirm the figure in the maker's documentation for your machine.

The practical point is the step size. With a 2:1 ratio, a stack that goes up in 10 lb steps would give 5 lb steps at the handle. A motorised machine states its steps directly: 1 kg for Model I,¹ 1 kg for the Gym Monster 3⁴ and 0.45 kg for the Gym Nano.⁵ Smaller steps help with the gradual build-up the NHS recommends.⁶ See progressive overload for how to use them.

Space, ceilings and walls in UK homes

Most British homes have little spare floor, and many are rented or flats. The checks below come from maker pages. We did not read a UK standard for wall loads or a rule on tenants fixing equipment to walls, so none is quoted.

• Floor space. Model I needs about 2 m² of clear training space, which is 2 × 10.764 = 21.5 sq ft.¹ The Gym Monster 3 takes 0.26 m² folded (the page gives 2.7 ft²) and 0.84 m² unfolded, about 9.0 sq ft.⁴
• Height. The REP Ares 2.0 stands 80 in, which is 203 cm.² Our sources do not give a ceiling height for Model I, so check the product page.
• Wall type. Model I needs a load-bearing wall, and the page says to use the included template on studs, concrete or brick, and to hire a qualified installer if you are unsure of the wall type.¹ The REP Ares 2.0 mounts on studs spaced 16 in or 24 in apart.²
• Mounting time and follow-up. The Model I page gives 10 to 30 minutes on a suitable wall and says to retorque the anchors after the first month.¹
• Renting. Chutex says renters can install Model I with landlord approval, and that patch repair on move-out depends on the lease. In apartments, building managers should approve wall fixings where required.¹
• Power. The pages read for this guide do not describe a UK socket arrangement for any motorised machine, so check the power details with the maker.

Model I is not for any wall. The checks above are the reason. If you cannot say what your wall is made of, ask an installer rather than guess.

Exercises you can do on a cable machine

The NHS asks for activities that work all the major muscle groups: legs, hips, back, abdomen, chest, shoulders and arms.⁶ The Model I page names families of movement rather than muscles: rows, pulldowns, presses, curls, squats, core anti-rotation and mobility flows. The box includes a T-bar, double handles, an ankle strap, a tricep rope, a Bluetooth module, a double connector and a wall mount kit.¹

The app matters for beginners. The Model I page says the Chutex app has 114 exercise videos.¹ For how many sets and reps to use, the NHS figure is 8 to 12 repetitions of an activity, which counts as 1 set, with at least 2 sets.⁶ Read sets and reps for the detail.

The NHS also says to warm up before you start, and to stop an exercise immediately if you feel pain or become unwell.

Cable machine or free weights?

The honest answer is that it depends on what you want from the kit. Official UK guidance does not rank them: the CMOs list free weights and resistance machines side by side.⁷

The maker view for a cable is constant tension and guided paths. For free weights, the Model I page says storage and spotting for heavy lifts are the cost.¹ Neither point is independent.

A home with room for a machine and a rack can have both. A small flat may only suit one. For prices and the starter tiers, read home gym equipment.

Safety, maintenance and noise

Noise is stated by the makers and has not been measured by an independent party. Chutex says the Model I motor is typically under 40 dB at normal loads, and the page advises avoiding silent hours in sensitive buildings and using a mat under the training zone to reduce vibration.¹ Speediance gives the Gym Nano a noise level of 60 dB or below.⁵

On maintenance, the only instruction read is the Model I advice to retorque the anchors after the first month of use.¹ We did not read a maintenance schedule or running cost for any machine, so we give none.

For your body, the rules do not change with the kit. Arthritis UK lists a proper warm-up and cool-down, safe equipment, the right clothing and footwear and the right technique among the ways to avoid exercise injuries.⁸ Model I is fitness equipment, not a medical device and not a therapy.¹ If you have a medical condition, or have not exercised for some time, the NHS says to speak to your GP first.⁶

Cost over time and what to check before you buy

Prices differ by an order of magnitude, and so do the bases. These are prices as shown on UK maker or storefront pages on 2026-10-16. REP prices come from a configurator and are for the base configuration shown, which options change.

Model I's own price line says UK import VAT and duties, if any, are payable on delivery,¹ so check what that means for your delivery before you decide.

A checklist before you buy

1. Do you need a machine at all? The NHS minimum is at least 2 days of strengthening a week, with or without kit.⁶⁷
2. Measure the floor space and the height, and compare with the maker sizes above.
3. Check the wall type, the template and the need for an installer.¹
4. If you rent or live in an apartment block, get approval for wall fixings.¹
5. Compare the step size of the load. Smaller steps suit a gradual build-up.¹⁴⁵⁶
6. Check what is included: handles, straps, rope, app, subscription and warranty.
7. Check what the price includes. The REP cart text reads “Tax included. Free Shipping.”, and Model I's price line mentions UK import VAT and duties on delivery.¹

Related reading: progressive overload, sets and reps and the UK strength training guidelines.

Frequently asked questions