Moderate-intensity exercise corresponds to 50% to 70% of your maximum heart rate, according to the American Heart Association. For most adults, that translates to roughly 75 to 150 beats per minute depending on your age. You can estimate your maximum heart rate by subtracting your age from 220, then multiplying by 0.50 and 0.70 to find your personal moderate zone.
Target Heart Rates by Age
Your maximum heart rate declines naturally with age, which means your moderate-intensity zone shifts downward too. Here’s what the numbers look like across the adult lifespan, based on the American Heart Association’s chart:
- Age 20: 100 to 140 bpm (max heart rate: 200)
- Age 30: 95 to 133 bpm (max: 190)
- Age 40: 90 to 126 bpm (max: 180)
- Age 50: 85 to 119 bpm (max: 170)
- Age 60: 80 to 112 bpm (max: 160)
- Age 70: 75 to 105 bpm (max: 150)
These ranges use the simple “220 minus age” formula. It’s a useful starting point, but individual variation is real. Two 45-year-olds with different fitness histories can have noticeably different maximum heart rates. If you’ve been sedentary for years, your heart rate will climb faster during the same activity compared to someone who exercises regularly. Athletes tend to reach the same workload at proportionately lower heart rates because their cardiovascular systems are more efficient.
A More Personalized Calculation
The standard formula ignores one important variable: your resting heart rate. A method called the heart rate reserve formula (sometimes called the Karvonen method) accounts for this by subtracting your resting heart rate from your maximum heart rate first, then applying the percentage. The result gets added back to your resting heart rate to give you a more tailored target.
For example, if you’re 40 years old with a resting heart rate of 65 bpm, your maximum is roughly 180. Your heart rate reserve is 180 minus 65, which equals 115. Multiply 115 by 0.50 and 0.70 to get 57.5 and 80.5. Add your resting heart rate back: your moderate zone would be about 123 to 146 bpm. That’s meaningfully different from the simpler calculation, especially if your resting heart rate is unusually high or low.
To find your resting heart rate, check your pulse first thing in the morning before getting out of bed, counting beats for a full 60 seconds. Do this on a few different days and average the results.
How Moderate Exercise Should Feel
Heart rate monitors and fitness trackers make it easy to check your numbers, but you don’t actually need a device. The simplest gauge is the talk test: during moderate-intensity activity, you can carry on a conversation but you can’t sing. Your breathing picks up noticeably, you start to sweat lightly after about 10 minutes, and the effort feels “somewhat hard” without feeling like you’re pushing your limits.
On the Borg Rating of Perceived Exertion scale, which runs from 6 (sitting still) to 20 (maximum effort), moderate exercise falls between 12 and 14. That range maps to the subjective feeling of working steadily but sustainably. If you could keep going for 30 to 60 minutes at the same pace without needing to stop, you’re likely in the right zone.
Activities That Qualify
The CDC defines moderate intensity as any physical activity that burns 3 to 5.9 times the energy your body uses while sitting still. That measurement, called a MET, gives a standardized way to compare activities regardless of who’s doing them. Plenty of common exercises fall into this range:
- Brisk walking at 2.5 miles per hour or faster
- Recreational swimming
- Cycling slower than 10 miles per hour on flat ground
- Doubles tennis
- Active yoga like Vinyasa or power yoga
- Water aerobics
- Ballroom or line dancing
- General yard work and home repair
The key distinction is that these activities raise your heart rate and breathing without leaving you gasping. If brisk walking pushes you to 75% or 80% of your max, that’s actually vigorous intensity for you, regardless of what a chart says the activity “should” feel like. Your fitness level determines where an activity falls on the spectrum.
When Heart Rate Zones Don’t Apply
Certain medications fundamentally change how your heart responds to exercise. Beta-blockers, commonly prescribed for high blood pressure and heart conditions, slow the heart rate so significantly that you may never reach your calculated target zone no matter how hard you work. The Mayo Clinic notes there’s no simple formula to predict how much a beta-blocker will suppress your heart rate during exercise.
If you take a beta-blocker or another heart rate-lowering medication, the perceived exertion method becomes your primary tool. Focus on how the exercise feels rather than the number on your wrist. An exercise stress test, done on a treadmill or stationary bike in a clinical setting, can also help establish a personalized target that accounts for your medication.
How Much Moderate Exercise You Need
The World Health Organization recommends at least 150 minutes of moderate-intensity physical activity per week for adults. That breaks down to about 30 minutes on five days, though you can split it however works for your schedule. Three 10-minute walks in a day count the same as one 30-minute session.
Staying in the 50% to 70% heart rate zone during those minutes is the sweet spot for cardiovascular health, and it’s sustainable enough that most people can maintain it long-term. If you’re just starting out, aiming for the lower end of your zone (closer to 50% of max) and gradually building up over weeks is a practical way to build consistency without burning out.