Cycling for Weight Loss: Complete Plan

The honest calorie maths

From what we see in UK cycling. The riders who lose weight cycling and keep it off look very similar across age, gender and starting fitness: three to five rides a week of varying intensity, two short strength sessions, and a diet pattern that prioritises protein and fibre over precise calorie counting. The riders who try one ten-mile sprint a day and a 1,200-calorie diet quit within a month, almost without exception.

A 70kg rider going 15mph on a flat road burns roughly 500 calories per hour. Going 18mph, around 700 calories per hour. Riding hilly terrain at the same effort, around 700-900 per hour. Those numbers are useful as a planning baseline. They are not, in practice, what you will lose at the scale.

The reason is that exercise increases hunger almost in proportion to the calories burned. Eat a 600-calorie meal after a 600-calorie ride and the net is zero. Eat a 1,200-calorie post-ride pub meal and you are heavier than when you started. Most people who start cycling for weight loss and fail are not failing because the cycling does not work. They are failing because they are eating it back, often without noticing.

The maths that does work: a daily deficit of 300-500 calories sustained for months, with the cycling doing maybe a third of that work and food choices doing the rest. At 500 a day you lose roughly half a kilo a week. At 300 a day you lose around a quarter. Slow but durable. Faster than a kilo a week is unsustainable for almost everyone and the rebound is brutal.

If you weigh yourself daily expect noise of plus or minus 1.5kg from water and food in the gut. Look at the seven-day rolling average, not the morning number. The trend matters; a single day means nothing.

Why cycling, specifically

Cycling is one of the most joint-friendly endurance sports. It is what physiotherapists prescribe to runners with knee problems and to obese patients who cannot start with running. The non-weight-bearing nature means you can do an hour, and then another hour the day after, without the cumulative impact damage that running causes for many beginners.

Cycling also scales gracefully. A first ride of fifteen minutes at five mph is a fitness session at any starting weight. Three months later, the same person doing a three-hour ride is plausible. That progression rate is faster than running progressions for most people.

The downside is that cycling does not build the muscle mass that resistance training does, and muscle mass is what raises resting metabolic rate (the calories you burn doing nothing). Pure cyclists have to work harder than pure weightlifters to maintain weight on a maintenance diet. The fix is to combine the two; see the strength section below.

The right training mix

The best plan for sustainable weight loss through cycling is unfashionable. Most of your time should be spent at low intensity, conversational pace, where you can talk in full sentences. This is "Zone 2" in coaching parlance: roughly 60-70 percent of your maximum heart rate, fat-burning territory.

A starter weekly plan:

• 3 rides per week, 60-90 minutes each, at conversational pace
• 1 ride at higher intensity (intervals, fast cafe ride, or a hilly route)
• Rest day or two

Total around 4-5 hours of cycling. That is enough to burn 1,500-2,500 calories of exercise, which combined with sensible food choices delivers a sustainable 500-calorie daily deficit.

What this is not: smashing yourself for an hour every day. High-intensity exercise burns calories faster but is unsustainable for most people, drives massive hunger, and risks injury.

The Zone 2 question

Zone 2 has become a cult on social media in 2025-2026. The cult overstates the science but the underlying principle is correct. Long, slow, easy rides build the aerobic base that lets you ride more often without breaking down. They burn fat as the primary fuel. They do not exhaust you.

How to find your Zone 2 without a heart-rate monitor or power meter: ride at the pace where you can hold a conversation but cannot sing. If you can sing, you are too easy. If you can only get short sentences out, too hard. The rule of three: speak three full sentences without gasping.

With a heart-rate monitor: 60-70 percent of your max heart rate. Max heart rate is roughly 220 minus your age, with significant individual variation. A 40-year-old has a max around 180 and a Zone 2 of 108-126.

With a power meter: 56-75 percent of your FTP (functional threshold power). If you do not know your FTP, do a 20-minute all-out time-trial test, take 95 percent of your average power as your FTP estimate, and use that.

Strength training: do not skip it

Cyclists who ignore strength training look gaunt and lose more muscle than fat over a long deficit. Two short sessions a week makes the difference between losing weight that stays off and losing weight that comes back twice over.

The minimum effective dose:

• Twice a week, 30-40 minutes
• Squat or leg press, 3 sets of 6-10
• Deadlift or hip hinge, 3 sets of 6-10
• Bench press or push-up, 3 sets of 6-10
• Row or pull-up, 3 sets of 6-10
• Plank or hanging leg raise, 3 sets of 30 seconds

That covers the major muscle groups, takes minimal time, and complements rather than competes with cycling. Do it on the days between cycling. Heavier weight, lower reps. Do not do high-rep "endurance" weight training; that is just bad cycling done indoors.

Nutrition: the boring bit that works

Three rules cover almost all of it.

Eat protein at every meal. Roughly 1.6 to 2.0 grams per kilo of bodyweight per day. For an 80kg person, that is 130-160g. This is more than most British diets contain. Eggs, chicken, fish, dairy, legumes, plus a protein shake to plug gaps if you must. Protein is satiating, requires energy to digest, and preserves muscle in a deficit.

Eat fibre. 30-40g a day. Vegetables, fruit, beans, oats, wholegrain bread. Fibre slows digestion and keeps you full. The British average is around 18g, far below recommended. Most cyclists find that increasing fibre alone fixes 70 percent of "I'm always hungry" complaints.

Carbs around training, less the rest of the time. Eat carbs before and during longer rides. Eat fewer carbs at meals away from training. This is sometimes called "fuelling for the work required" and it is the rule top cyclists actually follow. It is not the same as low-carb. It is timing carbs where they help and reducing them where they don't.

What to ignore: detox teas, fasting "windows" beyond what fits your life, intermittent fasting prescriptions that conflict with your training, supplements claiming fat-burning effects (caffeine and creatine excepted, neither does what people think it does for fat loss), and cold plunges (do them if you enjoy them; the metabolic effect is too small to matter).

Common errors

The post-ride pub trip. Two pints and a chicken burger is 1,400 calories. The two-hour ride that earned them was 900. You finished the day 500 calories ahead of where you would have been if you had skipped both.

Too much intensity, too soon. Beginners ride hard, get exhausted, eat back the deficit, plateau, give up. Easy and consistent beats hard and intermittent.

Underestimating drinks. A daily Costa or Pret latte is 200-300 calories before you have eaten anything. Switch to a flat white (around 90) or black coffee (zero) and the year-end weight loss is 5-7kg.

Cardio-only training. Will work in the short term, will plateau in the medium term, will not change body composition the way mixing in strength does.

Ignoring sleep. Less than seven hours sleep increases hunger hormones (ghrelin), reduces satiety hormones (leptin) and reliably blocks weight loss. The cyclist sleeping six hours and trying to lose weight is fighting their own biology.

What sustainable looks like

The riders who lose weight and keep it off for years follow a pattern. Three to five rides a week of varying intensity, mostly easy. Two short strength sessions. A diet built on protein, fibre and vegetables, with carbohydrates timed around training. Sleep eight hours. Drink less alcohol. They do not weigh themselves daily. They do weigh themselves weekly. They do not punish themselves for a bad week.

The first ten kilos take maybe six months. The next five take another six. Then you are at a weight that is sustainable and the cycling is the thing that keeps you there. The riders who try to lose three kilos a week with daily intervals and a 1,200-calorie diet last about three weeks before quitting.

Pick a sustainable plan over a fast one. The fast plan never finishes.