Best treadmills for home UK

Why is treadmill motor power so confusing?

Because two different numbers get called “horsepower” and only one of them describes how the machine behaves while you are actually using it.

Continuous horsepower (CHP) is the power the motor can sustain across a whole session. Peak horsepower is the momentary maximum it can hit during startup or a speed change. NordicTrack's own technical explainer puts it plainly: peak horsepower “does not indicate how much power the motor can maintain over extended workouts”. Peak is the bigger, more marketable number, which is why it is the one you usually see.

How badly does this play out in practice? On 9 August 2026, JLL's own product page for the Pegasus Connected described it as a “2.0 Peak HP Motor” in one place and a “peak 2.5 HP motor” in another, and gave no continuous figure at all. That is a manufacturer contradicting itself on the flattering number while omitting the useful one.

The honest exceptions are worth naming. JTX quotes 2.5 CHP for the Sprint-7. ProForm quotes 2.6 CHP for the Carbon TL. Decathlon publishes both figures for the T520B — 1.2 HP continuous and 895 W peak — which is the most transparent disclosure in this entire comparison.

As a rule of thumb: 1.5–2.0 CHP covers walking, around 2.5 CHP covers jogging, and running wants 3.0 CHP or more.

How long does the belt need to be?

Roughly 152 cm (60 inches) is the commonly-cited benchmark for running, about 140 cm is workable for jogging, and 122 cm is a walking-only deck. Taller runners need more, not less — and decks longer than 152 cm are rare and expensive.

Set the machines on this page against that benchmark and the picture is stark. Only the NordicTrack T Series 16 reaches 152 cm. The JTX Sprint-7 gets close at 145 cm. The ProForm Carbon TL is 140 cm. The JLL Pegasus (122 cm) and Decathlon T520B (121 cm) are walking decks, whatever else their spec sheets say.

This is why we have put the JLL Pegasus under “best for walkers only” rather than calling it a cheap running treadmill. A 12 km/h speed ceiling and a 122 cm belt are not a running machine, and it is more useful to say so than to let the price imply otherwise.

How much floor space does a treadmill actually need?

Considerably more than the folded dimensions imply — and this is the single most under-reported number in the category.

The ASTM F2115-12 safety standard specifies a minimum 0.5 m clearance on each side and 2 m behind the machine, so that a user who stumbles is thrown into clear floor rather than into a wall or a radiator. The 2012 revision tightened this from the earlier standard's 1 m rear clearance.

Retailer listings almost never mention it. One Argos folding treadmill advertises that it folds to “0.2 square metres” — true, and completely irrelevant to whether you can safely run on it in that room. A machine that stores in a cupboard still needs two metres of clear floor behind it every time you use it.

If you cannot give it that, a walking pad is the more honest purchase. You lose running and incline; you also lose the clearance problem entirely.

What we could not verify

Argos and Amazon UK both block automated access, so the Reebok and Opti pricing we found came from third-party price trackers rather than the retailer's own page. We have left those models out of the comparison table rather than present unconfirmed figures as fact — check them yourself before buying.

Two stock notes worth knowing, both true on 9 August 2026: the JTX Sprint-7 is out of stock on JTX's own site despite still being promoted as a top pick elsewhere, and the NordicTrack T Series 16 price above is an ex-display unit at a third-party retailer, not standard new pricing. NordicTrack's genuinely entry-level UK treadmill, the T Series 8, was also showing out of stock direct from the manufacturer.

And one that says a lot about this market: the JLL S300, for years the default UK budget recommendation, has been discontinued — its product page now redirects to JLL's homepage. Treadmill line-ups turn over fast, which is why every price here carries a date.

Questions people ask