
Are Exercise Bikes Good for Cardio? An Expert Guide
Are exercise bikes good for cardio? Yes, they're an affordable, low-impact way to burn calories and improve fitness. Here are the pros, cons and best home bikes.
By Paul Kendrick, Cardio & Endurance Editor · Updated 6 October 2026
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Most people shopping for a recumbent bike aren't chasing watts. They want to ride for half an hour without a narrow saddle digging in, protect a knee or a lower back that complains on a treadmill, and do it in a flat without annoying the neighbours. JLL's recumbent exercise bike, sold on Amazon UK as a magnetic stationary bike for seniors, is aimed squarely at that buyer, and at £298.99 when we checked on 6 October 2026, it lands right in the busiest part of the recumbent market.
On paper it ticks the expected boxes: a wide padded seat, eight levels of magnetic resistance, a belt drive, an LCD console with handlebar pulse sensors and Bluetooth to the free SunnyFit app. The flywheel is where we'd hesitate. At 4kg it's fine for gentle daily riding, and that's a light figure for a bike costing close to £300. JLL, which says it was founded in Birmingham in 2012, has built a decent name on Amazon with machines like the JLL IC400 spin bike, and this recumbent follows the same pattern of sensible specs at a fair price.
How we review
This review is research-based, not hands-on. We've worked from JLL's published specifications on the Amazon UK listing and direct comparison with recumbent bikes we've already covered, including the MERACH. We haven't ridden this exact bike, so we don't describe how it feels from personal experience or report test results we haven't run.
This bike makes sense for older riders, people coming back from injury and anyone who simply finds upright bikes uncomfortable. The step-through design matters more than it sounds: if lifting a leg over a crossbar is awkward for you, a recumbent removes that problem entirely. JLL also lets you adjust the seat with a handle while you're sitting on it, which is a real convenience for someone with limited mobility who'd otherwise have to get off, shuffle the seat and climb back on.
The NHS physical activity guidelines for older adults recommend at least 150 minutes of moderate activity a week, and 30 minutes on a recumbent five days a week covers that neatly. A 2026 systematic review of stationary bike interventions in adults aged 60 and over pooled 47 studies and found improvements in aerobic capacity, mobility and quality of life, though it also reported that acceptance and adherence across those studies were patchy. In other words, the bike only works if you keep using it, which is where comfort and a decent app earn their place.
It doesn't suit anyone wanting to train hard. If you're after sprint intervals or a heavy, road-like feel, a spin bike with a big flywheel will serve you far better.
JLL pairs a 4kg flywheel with a belt drive and eight magnetic resistance levels. Magnetic systems don't touch the flywheel, so there are no pads to wear out and very little noise, and JLL pitches it as quiet enough for early-morning or late-evening rides in a shared home. That's a reasonable claim for this type of drive, and it's consistent with what owners of similar magnetic recumbents report.
The flywheel weight is the compromise. A light flywheel carries less momentum, so the pedal stroke feels easy and slightly less smooth at low cadence than a heavier wheel would. For a 30 to 45 minute steady ride that won't bother most people. The issue is headroom: with only eight levels, fit riders are likely to reach the top setting within weeks, and the jumps between levels are coarse enough to make fine-tuning an interval session awkward.
Recumbents also work the legs more fully than people assume. A small 2016 study comparing muscle activity across upright bikes, recumbent bikes, treadmills and an elliptical-style bike found that glute, hamstring and lower back activity was broadly similar across all four at moderate effort. Upright cycling produced the most calf activity, and treadmill walking worked the shin muscles harder than recumbent cycling. So you're not giving up much leg work by sitting back, though you should still add some strength work elsewhere in your week.
| Resistance | Magnetic, 8 levels |
|---|---|
| Flywheel | 4 kg |
| Drive | Belt |
| Seat | 43 x 30 x 5 cm padded, reclined backrest, handle adjustment |
| Console | LCD: time, speed, distance, calories, odometer, RPM, pulse |
| Heart rate | Handlebar pulse sensors |
| Connectivity | Bluetooth to SunnyFit app, no subscription |
| Assembled size | 133 x 67 x 108 cm (L x W x H) |
| Bike weight | Approx 27 kg (Amazon listing) |
| Max user weight | Not stated on listing |
| Standards | EN957, CE, UKCA, ISO (per JLL) |
| Price when checked | £298.99 (6 October 2026) |
The LCD shows time, speed, distance, calories, an odometer and RPM, which covers what most riders need. Cadence is the useful one here, because on a bike with only eight levels you'll vary effort mostly by pedalling faster. Treat the calorie figure as a rough trend, since the console can't know much about your body or fitness.
SunnyFit is the stronger selling point. JLL says it's free with no subscription and quotes over 2,300 trainer-led sessions and more than 10,000 scenic routes, with community challenges on top. Plenty of rival bikes either lock their content behind a monthly fee or connect to a thin app that only logs your rides. The device tray above the console puts a tablet at eye level for following along. One caveat: you still change the resistance by hand, so the app guides you rather than adjusting the bike automatically.
Heart rate comes from sensors in the handlebars. These grip sensors need steady contact and dry hands, so expect the reading to drop out or jump around. If you want to ride to heart rate zones, pair a chest strap with the app instead.
Comfort is the reason to buy any recumbent, and JLL has put its effort into the seat. At 43 by 30cm with 5cm of padding, it's a wide base, and the reclined backrest takes load off the lower back. The MERACH counters with a breathable mesh backrest, which stays cooler on long rides, so you're choosing between seat width and ventilation. Anti-slip pedals with adjustable foot straps keep your feet planted, which helps riders with less grip strength or control in the ankles.
JLL describes an alloy-steel frame with precision bearings. At roughly 27kg according to Amazon's listing data, it's sturdy enough for home use without being a beast to move, and the front wheels let one person tilt and roll it into a corner. Plan for about 1.35m of floor length plus a bit behind the seat. What we can't tell you is the maximum user weight, because the listing we checked doesn't give one. That's an odd omission for a bike sold to seniors and heavier beginners, and you should confirm it with JLL before ordering if it matters to you.

The obvious rival is the MERACH recumbent exercise bike, which we rated 4.0. The two are closer than their marketing suggests. Both use eight magnetic levels and a light flywheel, both rely on grip pulse sensors and both connect to an app without giving it control of the resistance. The JLL costs about £30 less at the time of writing, has a marginally heavier flywheel (4kg against roughly 3kg) and comes with an app offering far more content for free.
So why rate it lower? The MERACH has been on sale longer, and its mesh backrest and frosted grips show attention to small daily details. The JLL is newer, and its missing weight limit leaves a question we'd want answered before spending £300. If the price gap widens, the JLL becomes the easier recommendation. Our best recumbent exercise bike UK guide covers the wider field, and once you've got a bike, our recumbent bike workout gives you structured sessions that make the most of eight levels.
Check price on AmazonYes, it's designed around older and less mobile riders. The step-through frame means you don't have to lift a leg over a crossbar, the seat adjusts with a handle you can reach while sitting down, and the 43 by 30cm padded seat with a reclined backrest spreads your weight away from the knees and lower back. Level one is gentle enough for someone returning to exercise.
JLL lists a 4kg flywheel. That's slightly more than the roughly 3kg on the MERACH recumbent we've also reviewed, but still light. It gives a smooth, easy pedal stroke for steady riding rather than the weighty, momentum-carrying feel of a spin bike, so very fit riders will find the top of the range sooner than they'd like.
No. JLL states the bike pairs with SunnyFit over Bluetooth with no subscription required, and the listing quotes over 2,300 trainer-led sessions and 10,000 scenic routes. The resistance itself is set by hand on the bike, so the app can guide and track your rides but won't change the resistance for you.
The Amazon listing we checked doesn't state a maximum user weight, and we couldn't confirm one from JLL directly at the time of writing. If you're near the upper end of typical limits for home bikes, ask JLL or check the product questions on Amazon before you buy rather than assuming.
JLL gives the assembled size as 133cm long, 67cm wide and 108cm tall. Leave extra room behind the seat if taller riders will slide it back. Front transport wheels let one person tilt and roll it, and Amazon lists the bike at roughly 27kg, so it's movable but not something to carry upstairs every day.
They're close. The JLL is about £30 cheaper at the time of writing, has a slightly heavier flywheel and a free app with far more content. The MERACH has a breathable mesh backrest and a more established following among owners. Neither suits interval training, so pick on price and which app you'd actually use.

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