How Much Exercise Do Adults Need? The Physical Activity Guidelines Explained

Most people know exercise is good for them, but it's less clear exactly how much they need. The Physical Activity Guidelines for Americans, published by the U.S. Department of Health and Human Services, answer that question. The Centers for Disease Control and Prevention (CDC) uses these guidelines as the basis for its recommendations.

Here's a plain-English breakdown of what the guidelines say and how to meet them.

The recommendation for adults

According to the CDC, adults need:

1. At least 150 minutes a week of moderate-intensity aerobic activity — such as brisk walking — or 75 minutes a week of vigorous-intensity activity, or an equivalent combination of both.
2. Muscle-strengthening activities on at least 2 days a week that work all major muscle groups: legs, hips, back, abdomen, chest, shoulders, and arms.

150 minutes might sound like a lot, but it breaks down to about 30 minutes a day, 5 days a week. And you can split that into smaller chunks — for example, three 10-minute walks.

Moderate vs. vigorous: what's the difference?

Moderate-intensity activity

Your heart beats faster and you breathe harder, but you can still talk. A common test: you can talk, but not sing.

Examples:

• Brisk walking
• Water aerobics
• Riding a bike on mostly level ground
• Doubles tennis
• Pushing a lawn mower
• Active yard work or gardening

Vigorous-intensity activity

You're breathing hard and fast, and you can't say more than a few words without pausing for breath.

Examples:

• Running or jogging
• Swimming laps
• Riding a bike fast or on hills
• Singles tennis
• Basketball
• Hiking uphill

As a general rule, 1 minute of vigorous activity is roughly equal to 2 minutes of moderate activity.

What counts as muscle strengthening?

Muscle-strengthening activities make your muscles work harder than usual. Examples include:

• Lifting weights
• Working with resistance bands
• Bodyweight exercises like push-ups, squats, and lunges
• Heavy gardening, such as digging and shoveling
• Some forms of yoga

Do enough repetitions that it would be hard to do another one. Our beginner's guide to strength training walks through a simple routine.

Why physical activity matters

The CDC notes that regular physical activity is one of the most important things you can do for your health. Benefits include:

• Immediate benefits: better mood, sharper thinking, reduced short-term anxiety, and better sleep
• Lower risk of chronic disease: including heart disease, stroke, type 2 diabetes, and several types of cancer
• Healthier blood pressure and cholesterol
• Stronger bones and muscles, which become increasingly important with age
• Lower risk of falls and better ability to do everyday tasks as you get older
• Help with weight management, alongside healthy eating

More is better — but some is better than none

The guidelines say adults can get even more health benefits by going beyond 150 minutes a week — up to 300 minutes of moderate activity. But if you're currently inactive, don't let that discourage you. Moving more and sitting less benefits everyone, and any amount helps.

If 150 minutes feels out of reach, start with what you can do — even 5 or 10 minutes a day — and build gradually. Our guide to sitting less and moving more has easy ideas.

How to fit 150 minutes into a busy week

Here are a few sample schedules:

Option A: 30 minutes, 5 days a week Brisk walk for 30 minutes Monday through Friday, plus two short strength sessions.

Option B: Weekend-heavy Two 45-minute bike rides on the weekend, plus a 20-minute walk on three weekdays, and strength training twice.

Option C: Short bouts Three 10-minute walks each day, five days a week (before work, at lunch, after dinner), plus bodyweight exercises at home twice a week.

Starting safely

For most people, moderate activity like brisk walking is safe. Still, talk with your healthcare provider before starting a new exercise program if you:

• Have a chronic condition such as heart disease, diabetes, or arthritis
• Have symptoms like chest pain, dizziness, or unusual shortness of breath
• Are pregnant
• Haven't been active in a long time and have health concerns

Start slowly, increase gradually, and listen to your body. Build in rest and recovery as you progress.

The bottom line

Aim for at least 150 minutes of moderate activity each week — about 30 minutes on most days — and add muscle strengthening twice a week. Choose activities you enjoy, break them into manageable chunks, and remember that every bit of movement counts.

Ready to begin? Try our guide to walking for health or a no-equipment home workout.