How Much Exercise Do You Need to Lose Weight?

In brief: how much exercise to lose weight depends on the goal, but the starting point is 150 minutes of moderate activity a week (or 75 of vigorous), plus muscle-strengthening work on 2 or more days. US guidelines say losing over 5% of your body weight, or keeping lost weight off, may take more than 300 minutes a week. Exercise works best combined with eating fewer calories.

How Much Exercise to Lose Weight: The Weekly Targets

The guidelines describe a ladder. Each step brings more benefit, and the top step is where weight control usually sits.

Goal	Moderate activity per week	Or vigorous activity per week	Plus
Baseline health benefits	150 minutes	75 minutes	Strength work on 2+ days
Greater health benefits	150 to 300 minutes	75 to 150 minutes	Strength work on 2+ days
Losing more than 5% of body weight	More than 300 minutes may be needed	About half the moderate time	Strength work to protect muscle
Keeping weight off after a loss	300 minutes or more	About half the moderate time	Strength work on 2+ days

Both the NHS and the US guidelines use the same 150-minute floor. The US guidelines add that many people need more than 150 minutes a week just to hold their weight steady, and that the right amount differs widely from one person to the next.

How Much Exercise to Lose Weight Per Day

Weekly targets are easier to plan once you split them up. The NHS suggests spreading your activity evenly across the week, on four or five days or daily.

Weekly target	Over 5 days	Over 7 days
150 minutes	30 minutes a day	About 21 minutes a day
300 minutes	60 minutes a day	About 43 minutes a day

You don't have to do it in one go. Since 2018, the US guidelines count moderate-to-vigorous activity of any length toward the total. The old rule that a session had to last at least 10 minutes no longer applies. If you're starting from very little, NIDDK suggests beginning with 5 minutes several times a day, 5 or 6 days a week, then building up to 10-minute sessions three times a day.

A Sample Week That Reaches 300 Minutes

Here is one way to build a week at the weight-control end of the guidelines. Swap activities freely; what matters is the total and the two strength days.

Day	Aerobic activity	Strength	Moderate-equivalent minutes
Monday	45-minute brisk walk	20 minutes, whole body	45
Tuesday	30-minute bike ride	None	30
Wednesday	25-minute run (vigorous, counts double)	None	50
Thursday	45-minute brisk walk	20 minutes, whole body	45
Friday	Three 10-minute walks	None	30
Saturday	60-minute hike	None	60
Sunday	40-minute swim, moderate pace	None	40

That adds up to 300 moderate-equivalent minutes, plus two strength sessions. If that's far beyond where you are now, start with 150 and add 15 to 30 minutes a week.

What Counts as Moderate or Vigorous Exercise?

Intensity matters because vigorous activity counts double. One minute of vigorous effort is roughly equal to two minutes of moderate effort.

Intensity	Talk test	Examples
Moderate	You can talk but not sing	Brisk walking (about 3 mph), cycling, dancing, doubles tennis, water aerobics, hiking
Vigorous	You can only say a few words before pausing for breath	Running, swimming, fast or hilly cycling, skipping, aerobics, most team sports
Very vigorous	Short bursts of maximum effort with rests	Interval running, sprinting uphill, circuit training, spinning, heavy lifting

In technical terms, moderate activity uses 3 to 5.9 times your resting energy (METs), and vigorous activity uses 6 or more. A brisk 3 mph walk is about 3.5 METs. Running a 10-minute mile is about 10 METs. The 150 to 300 minutes of moderate activity in the guidelines equals roughly 500 to 1,000 MET-minutes a week.

Why Diet Still Matters Most

Exercise helps, but it rarely does the job alone. The US guidelines say weight loss is most successful when people combine eating fewer calories with more physical activity, rather than relying on either one. NIDDK puts it the same way: the key is a healthy eating plan you can stick with, while activity uses extra calories and helps you keep the weight off.

Our guide to the calorie deficit you need to lose weight shows how to set the eating side of the plan.

How Much Exercise to Lose Fat, Not Muscle

When you lose weight, some of it can come from muscle. Exercise changes that mix in two ways:

• Aerobic activity helps reduce abdominal fat, according to the US guidelines.
• Muscle-strengthening activity helps you keep lean mass while you lose weight. It also supports weight maintenance, though less than aerobic activity does.

The minimum is two strength days a week that cover every major muscle group: arms, shoulders, chest, back, abdomen, hips and legs. This is on top of your aerobic minutes, not part of them. Our guide to strength training for beginners explains how to start.

A Worked Example: What Exercise Adds to Your Calorie Burn

Take a 45-year-old woman who is 165 cm (5 ft 5 in) tall and weighs 85 kg (187 lb). Using the Mifflin-St Jeor equation, as our TDEE calculator does:

• Resting burn (BMR): 10 × 85 + 6.25 × 165 − 5 × 45 − 161 = about 1,495 calories a day
• Desk job, no exercise (activity factor 1.2): 1,495 × 1.2 = about 1,794 calories
• Exercising 3 to 5 days a week (factor 1.55): 1,495 × 1.55 = about 2,318 calories

Moving up that activity level adds roughly 523 calories a day to her estimated burn. If her eating stayed exactly the same, that gap would add up to 3,661 calories a week, which the rule of thumb our calculators use (about 7,700 calories per kilogram) turns into about 0.5 kg (1 lb) a week.

Two cautions apply. The activity factors are a widely used convention, not a measurement. And a 2011 modeling study in The Lancet found that body weight responds slowly to a change in energy balance, with a half-time of about a year, so loss tapers over time. Recalculate every few kilograms.

Getting Started Safely

Start slowly and build up how long and how often you're active. Brisk walking is the easiest entry point: it's free, needs no skill, and a 10-minute walk already counts toward your weekly total. Water workouts put less stress on sore joints.

Some minor muscle soreness is normal at first. Stop and get help straight away if you have chest, neck, shoulder or arm pain or pressure, extreme breathlessness, or dizziness or sickness. Track your progress with a step counter, app or journal. Popular advice like 10,000 steps a day isn't a guideline in itself, just one way to reach the weekly minutes.

Limits and When to Get Advice

These targets are for healthy adults. Talk to a doctor before starting if you've been inactive for a long while or have heart disease, high blood pressure, diabetes, a joint problem, or another health condition. The NHS says the same weekly targets suit pregnant women and new mothers, but vigorous activity isn't advised in pregnancy if you were inactive beforehand. And remember that being active still pays off, for example in your blood pressure and mood, even if the scale doesn't move.

Frequently Asked Questions

Can you lose weight with exercise alone?

You can, but it's hard. The US guidelines say combining fewer calories with more activity works better than either one alone. Use exercise to widen a modest calorie deficit, protect muscle and keep lost weight from coming back.

How much exercise do I need to lose weight per week?

Start with at least 150 minutes of moderate activity, such as brisk walking, plus two strength sessions. For losing more than 5% of your body weight, US guidelines say you may need over 300 minutes a week, together with reduced calorie intake. Vigorous activity counts double, so 150 minutes of running is roughly equal to 300 minutes of walking.

Is walking enough exercise to lose weight?

Brisk walking at about 3 mph is moderate activity, so it counts fully toward the weekly guidelines. Walking 60 minutes on five days gives you 300 minutes. On its own it may not cause much weight loss, but paired with a calorie deficit and two strength sessions a week, it is a solid and sustainable plan.

How much exercise do I need to keep weight off?

To stop weight creeping back, NIDDK suggests building up to at least 300 minutes a week at a moderate pace. The US guidelines agree that people who are keeping off a significant loss may need more than 300 minutes. Combine that with your usual healthy eating plan and regular weigh-ins.

To see how your activity level changes your daily calories, use the TDEE calculator.