By Paul Kendrick, Cardio & Endurance Editor · Updated 6 October 2026
A recumbent bike is the exercise bike you can sit on for 45 minutes without your back or backside complaining. You lean against a proper backrest, your legs push forwards rather than down, and there's nothing to balance. That comfort is its biggest strength and its biggest trap, because it's very easy to pedal for half an hour at an effort that barely registers.
This guide fixes that. You'll get the seat position right first, then learn how hard each session should feel, and then pick from four workouts that run from a gentle starter ride to proper intervals. If you haven't got a bike yet, our guide to the best recumbent exercise bikes in the UK covers the models worth buying.
Get this wrong and you'll either strain your knees or lose half your power. It takes two minutes.
If the backrest angle adjusts, start fairly upright. A more reclined position feels relaxed but makes it harder to push hard during intervals. We cover the same knee-bend principle for upright bikes in our exercise bike seat height guide.
The simplest gauge is the rating of perceived exertion (RPE), a 1 to 10 scale where 1 is sitting still and 10 is an all-out sprint you can hold for a few seconds. Use the talk test alongside it, which the NHS uses to define moderate activity: you can still talk but not sing (NHS physical activity guidelines).
| Effort | RPE | Talk test | Rough heart rate zone |
|---|---|---|---|
| Easy | 3 to 4 | Full sentences, could sing | Zone 1 to 2 |
| Moderate | 5 to 6 | Talk, but not sing | Zone 2 to 3 |
| Hard | 7 to 8 | A few words at a time | Zone 4 |
| Very hard | 9 | Single words only | Zone 5 |
If you train with a heart rate strap, our heart rate zone training guide explains how to work out your zones. One caveat: your heart rate probably won't climb quite as high on a recumbent bike. In a study of 18 healthy adults, upright cycling produced significantly higher peak power, oxygen uptake and heart rate than cycling at a 40 degree recumbent angle (Frontiers in Sports and Active Living, 2021). So if you've set zones from a running or upright bike test, expect to sit a few beats lower at the same effort and trust RPE when the two disagree.
Cadence matters too. For steady rides, 70 to 80rpm suits most people. For hard efforts, aim for 80 to 90rpm and add resistance until that feels tough. Spinning at 110rpm against almost no load feels busy but doesn't do much.
Each session includes its own warm-up and cool-down. Start with Workout 1 even if you're reasonably fit, because it shows you where your bike's resistance levels actually sit.
| Block | Time | Effort |
|---|---|---|
| Warm-up | 5 min | RPE 3, low resistance |
| Steady | 12 min | RPE 5, talk but not sing |
| Cool-down | 3 min | RPE 2 to 3 |
Ride this three times in your first week. Each week after that, add 3 to 5 minutes to the steady block until you reach 30 minutes. Five 30-minute rides a week hits the NHS target of 150 minutes of moderate activity, and riding a bike sits on the NHS's own list of moderate activities.
This one builds leg strength without any flat-out efforts, which makes it a good second step.
If your cadence drops below 65rpm at the top of the pyramid, you've added too much. Take a level off next time.
Tempo work sits just below hard. It's the effort you'd describe as "comfortably uncomfortable", and it improves how long you can hold a decent pace.
Once three blocks feel controlled, stretch each tempo block to 8 minutes.
Save this one until you can ride Workout 3 comfortably. It's the same principle as our exercise bike HIIT workouts, adapted for a seat that lets you push hard against the backrest.
| Block | Time | Effort | Cadence |
|---|---|---|---|
| Warm-up | 6 min | RPE 3 building to 5 | 70 to 80rpm |
| Hard | 30 sec | RPE 8 to 9 | 85 to 95rpm |
| Easy | 60 sec | RPE 3 | 60 to 70rpm |
| Repeat hard and easy | 8 rounds total (12 min) | ||
| Cool-down | 6 min | RPE 2 to 3 | 60 to 70rpm |
Brace your back into the seat and grip the side handles during each hard effort. That stops you sliding forwards and lets your legs drive properly. Two interval sessions a week is plenty; fill the other days with Workouts 1 to 3.
A simple weekly plan
Week one: Workout 1 three times. Weeks two to four: Workout 1 twice and Workout 2 once, adding time to the steady rides. From week five: one each of Workouts 2, 3 and 4, plus one or two easy 30-minute rides. Leave a day between the two hardest sessions.
Your back gets proper support. The large seat and backrest hold your upper body, so you're not hunched over handlebars. That's the defining design difference between recumbent and upright bikes, and researchers comparing the two also point out that the low frame gives easier access for wheelchair users and people with mobility problems (International Journal of Sports Physical Therapy, 2014).
There's no impact. Your body weight rests on the seat, not your legs, so nothing jars your ankles, knees or hips the way running can. You control the load entirely through the resistance dial.
It suits older adults and anyone nervous about balance. You step through a low frame, sit in a chair-like seat and can't fall off. For many people in their 60s and 70s, that's the difference between exercising and not. The NHS guidelines also apply to disabled adults, and a recumbent bike is one of the few cardio machines that many of them can use at home.
It's kind to sore knees, if you set it up correctly. With the seat at the right distance your knee never bends sharply under heavy load, and you can keep the resistance light while you build up. That said, a recumbent bike isn't a treatment. If you've got a diagnosed knee condition, check with your GP or physio before starting and stop if pain builds during or after a ride.
Your legs still work hard. A comfortable seat doesn't mean an easy workout. In 10 non-cyclists riding at a moderate workload, peak activity in the four leg muscles tested didn't differ significantly between recumbent and upright bikes, and the recumbent bike actually produced higher activity in the hamstrings and shin muscles (IJSPT, 2014). It was a small study, so treat it as reassurance rather than proof.
Coasting at minimum resistance. This is the big one. If you could read a book while riding, you're not doing a workout. Raise the resistance until a steady ride genuinely feels like RPE 5.
Sitting too close. A cramped seat position makes your knees fold up towards your chest on every stroke, which feels awkward and loads the front of the knee. Slide the seat back until you get that slight bend at full extension.
Slouching away from the backrest. Letting your hips slide forward rounds your lower back and wastes the support you bought the bike for. Reset your position every few minutes if you notice it creeping.
Pushing only with your toes. Pressing through the ball of the foot is right, but pointing your toes hard at the bottom of each stroke shifts the work onto your calves. Keep your feet fairly flat through the whole circle.
Doing intervals every day. Hard sessions need recovery to work. Two a week, spaced apart, beats five half-hearted ones.
Skipping the warm-up. Five minutes of easy pedalling gets your knees and hips moving before you add load. It also stops your first hard interval feeling like a disaster.
An upright bike puts you on a small saddle above the pedals, leaning slightly forward onto handlebars. A recumbent bike sits you low in a bucket seat with the pedals out in front. Both train the same leg muscles, and the EMG data above suggests muscle activity is similar at moderate effort.
The real differences come at the top end and in comfort. Upright riders hit higher peak power and heart rate in the 2021 study, partly because you can stand up and use your body weight on an upright bike. That makes an upright or spin bike the better tool if hard intervals and maximum calorie burn are your priority. A recumbent bike wins for longer, steadier rides, for anyone with back pain or balance concerns, and for people who simply won't ride an uncomfortable bike more than twice.
Our view: if you're over 55, carrying a back or hip niggle, or returning to exercise after a long gap, buy the recumbent. You'll ride it more often, and consistency beats peak intensity. If you're fit and want a tool mainly for HIIT, go upright.
For specific models, we've reviewed the Merach recumbent exercise bike and the JLL recumbent exercise bike, which suit different budgets and space.
Beginners should start with 15 to 20 minutes at an easy, conversational pace and add 5 minutes a week. Working up to 30 minutes on five days gets you to the NHS target of 150 minutes of moderate activity a week.
Yes, as long as you add resistance. In a small EMG study, leg muscle activity on a recumbent bike didn't differ significantly from an upright bike at a moderate workload. The comfy seat makes it easy to coast, so the effort has to come from you.
There's no universal number because every bike's scale is different. Pick the level that makes a cadence of 70 to 80rpm feel like 5 or 6 out of 10 for steady rides, then turn it up for intervals until 80 to 90rpm feels like 8 out of 10.
It's often one of the more comfortable options because there's no impact and you control the load. Set the seat so your knee keeps a slight bend at full extension, keep resistance moderate and stop if pain builds during or after a ride. If you've got a diagnosed knee problem, ask your GP or physio first.
Usually a little fewer at the same perceived effort. One study found people reached higher peak power, oxygen uptake and heart rate on an upright bike than on a recumbent one. Riding a bit longer, or adding intervals, makes up the gap.
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