# How much cardio to lose weight > Diet creates the calorie deficit that drives fat loss; cardio is a support lever, not the main one. The NHS recommends at least 150 minutes of moderate cardio a week for health, while the ACSM found 200-300+ minutes a week produces the most fat loss — but only when paired with a calorie deficit. Keep strength training 2-3 days a week and enough protein so cardio doesn't strip muscle along with fat. Source: Lift Republic (https://liftrepublic.com/learn/how-much-cardio-to-lose-weight) Category: Fat loss · Published: 2026-06-07 · Reviewed: 2026-06-07 You've been told cardio melts fat — so you're grinding through hours on the treadmill and the scale won't budge. Here's the honest version: **cardio is a useful fat-loss lever, but it's the support act, not the headline.** Your diet creates the deficit; cardio helps you spend a bit more and protects your heart. This is exactly how much actually moves the needle — and where most people waste their effort. ## Diet creates the deficit — cardio supports it Fat loss comes down to one rule: you have to be in a **calorie deficit** — eating fewer calories than you burn. Cardio is one way to widen that gap, but it's a smaller lever than people think. Why? Because **you can out-eat almost any workout**. A hard 45-minute run might burn 400-500 calories — roughly one flapjack and a flat white. Five minutes of eating can undo an hour of effort. That's why "I'll just train it off" rarely works. So the order matters: get your nutrition right first, then add cardio to support it. If you haven't set your numbers yet, start with [calorie deficit explained](/learn/calorie-deficit-explained) and [how to lose fat](/learn/how-to-lose-fat), then work out your daily target with [how many calories to lose weight](/learn/how-many-calories-to-lose-weight). ## How much cardio actually helps Here's what the evidence supports. The **NHS** recommends at least **150 minutes of moderate activity** (or 75 minutes of vigorous) a week for general health. For **fat loss specifically**, the **ACSM** position stand found that 150-250 minutes a week produces only modest weight loss — and that **more than 250 minutes a week** is associated with clinically significant loss, especially when paired with a sensible diet. So a realistic, useful target for fat loss is: - **Floor:** 150 minutes/week (the health minimum — about 30 minutes, 5 days). - **Effective:** 200-300 minutes/week of moderate cardio, combined with a calorie deficit. - **Diminishing returns:** beyond that, recovery and hunger usually undo the extra burn. You don't have to white-knuckle it. Most of that can be brisk walking. Want to see what a session actually costs you? Drop your numbers in below. [[calc:calories-burned]] ## Steps and NEAT vs structured cardio The most underrated fat-loss tool isn't on a machine — it's **walking**. Daily steps and general movement (NEAT — non-exercise activity thermogenesis) often burn more over a week than your workouts, and they barely dent your recovery or appetite. A simple hierarchy: 1. **Steps first.** Build towards 8,000-10,000 a day. It's sustainable, low-stress and adds up. 2. **Then easy structured cardio.** Low-intensity work — the kind you can hold a conversation through. Our [zone 2 training](/learn/zone-2-training) guide covers this aerobic sweet spot. 3. **A little intensity, optional.** Short, hard intervals burn calories in less time but cost more recovery. Use them as seasoning, not the main meal. Pick what you'll actually repeat. The best cardio for fat loss is the one you'll still be doing in three months. ## Why cardio alone strips muscle — and how to keep it Here's the trap. Lose weight on cardio and a deficit alone, and a chunk of what you lose is **muscle** — the very thing that keeps you looking lean and toned rather than smaller-but-soft. Lose muscle and your metabolism dips, making the next kilo harder. The fix is non-negotiable: **keep lifting while you lose fat.** - **Strength train 2-3 days a week** to signal your body to hold onto muscle (the NHS recommends strength work on at least 2 days regardless). - **Eat enough protein** — roughly 1.6-2.2 g per kg of bodyweight. Check yours with the [protein calculator](/tools/protein). - **Treat cardio as the support lever**, not the whole plan. Do this and you lose fat, not tone. It's the same principle behind [body recomposition](/learn/body-recomposition) — and the reason crash-cardio leaves people skinny-fat. ## A realistic weekly template Pull it together and a sustainable fat-loss week looks like this: - **3 strength sessions** (full-body or upper/lower) to protect muscle. - **2-3 cardio sessions** of 30-45 minutes, mostly easy-paced — 150-250+ minutes total. - **8,000-10,000 steps most days** as your quiet, always-on burn. - **A modest calorie deficit** with enough protein, so you lose fat, not muscle. Expect a realistic **0.5-1% of bodyweight per week**. Faster than that and you're usually burning muscle and willpower you can't sustain. Most people don't fail because they did too little cardio — they fail because they hammered cardio, ignored their diet and starved their muscle. That's the whole point of [the Method](/method): get the deficit right, use cardio as a lever (not a punishment), and keep a coach adjusting the plan as your body changes. Want it built around your life and done with you? The [Fat Loss programme](/programmes/fat-loss) is designed for exactly this — lose the fat, keep the muscle, without living on the treadmill. ## FAQ ### How much cardio do I need to do to lose weight? For health, the NHS recommends at least 150 minutes of moderate cardio a week. For meaningful fat loss, the ACSM found 200-300 minutes a week works best — but only alongside a calorie deficit, since diet drives most of the result. Much of that can simply be brisk walking. ### Is cardio or weights better for fat loss? Both, together. A calorie deficit drives the fat loss, cardio helps you burn a little more, and strength training keeps the muscle that keeps you looking toned. Cardio alone tends to strip muscle along with fat, which is why we pair it with lifting. See body recomposition for how the two work together. ### Can I lose weight with cardio but no diet change? It's very hard. A hard 45-minute session burns only around 400-500 calories — easily eaten back in minutes — so without a calorie deficit, the scale rarely moves. Fix your nutrition first, then use cardio to widen the gap. ### Is walking enough cardio to lose weight? Yes, walking can absolutely support fat loss. Daily steps (aim for 8,000-10,000) often burn more across a week than gym cardio, and they're easy to sustain and recover from. Combined with a calorie deficit and some strength work, walking is one of the most reliable fat-loss tools there is.