A good heart rate for most runners falls between 60% and 85% of your maximum heart rate, depending on the type of run. An easy jog should keep you around 60% to 70%, while tempo runs and speedwork push you into the 80% to 90% range. The key is matching your heart rate to the purpose of each workout, not running at one fixed number every time you lace up.
How to Find Your Maximum Heart Rate
Every heart rate target starts with knowing your estimated maximum. The simplest formula is 220 minus your age. A 35-year-old would get a max of 185 beats per minute. A more refined version, developed by researcher Hirofumi Tanaka, uses 208 minus 0.7 times your age, which gives that same 35-year-old a max of about 183.
Neither formula is perfect. A study of recreational marathon runners found that the 220-minus-age formula overestimated max heart rate by about 5 beats per minute in women and underestimated it by about 3 beats per minute in men. The Tanaka formula performed slightly better for men. Both are starting points, not gospel. Your actual max heart rate is genetic and can vary by 10 to 15 beats in either direction from the estimate. If you consistently feel like you’re barely working at your calculated “hard” zone, or you’re gasping at what should be moderate, your true max likely differs from the formula.
Heart Rate Targets by Age
The general training range for regular exercisers is 60% to 85% of maximum heart rate. Here’s what that looks like across age groups:
- Age 20: 120 to 170 bpm
- Age 30: 114 to 162 bpm
- Age 40: 108 to 153 bpm
- Age 50: 102 to 145 bpm
- Age 60: 96 to 136 bpm
- Age 70: 90 to 123 bpm
These ranges cover everything from a comfortable distance run to a hard interval session. Where you should be within that range depends entirely on what you’re trying to accomplish that day.
The Five Heart Rate Zones
Training zones split your effort into five tiers, each with a different purpose.
Zone 1 (50% to 60% of max) is walking or very light jogging. You can hold a full conversation without effort. This is your warmup, cooldown, and recovery territory.
Zone 2 (60% to 70%) is where most of your easy running should happen. You can still talk in sentences, though you might pause occasionally for breath. This zone builds your aerobic engine and is where your body relies most heavily on fat for fuel. It feels deceptively easy, and that’s the point. Spending 70% to 80% of your weekly mileage here is how distance runners build endurance without burning out.
Zone 3 (70% to 80%) is comfortably hard. Conversation drops to short phrases. Many runners accidentally default to this zone on every run, which is a common training mistake. It’s hard enough to accumulate fatigue but not hard enough to drive the adaptations that come from true speed work. Some coaches call it “no man’s land.”
Zone 4 (80% to 90%) is tempo and threshold territory. Talking takes real effort. You’re building speed and the ability to sustain a hard pace. Runs here typically last 20 to 40 minutes.
Zone 5 (90% to 100%) is an all-out sprint. You can manage a few words at most between gasps. This is reserved for short intervals, hill repeats, and race finishes. It strengthens your heart’s peak capacity and recruits fast-twitch muscle fibers, but it’s not sustainable for more than a few minutes.
Which Zone Is Best for Your Goals
If your primary goal is general fitness and health, the American Heart Association recommends moderate intensity (50% to 70% of max) or vigorous intensity (70% to 85% of max). Both count toward the recommended 150 minutes of weekly activity, with vigorous minutes counting double.
If you want to lose fat, you might have heard that lower intensity burns more fat. There’s truth to this: in Zones 1 and 2, your body produces energy through a slower metabolic process that primarily burns fat. At higher intensities, your body shifts toward burning carbohydrates because they provide energy faster. But total calorie burn matters more than the fuel source. A 30-minute run in Zone 4 burns more total calories (and often more total fat) than 30 minutes in Zone 2. The practical takeaway: run at whatever intensity you can sustain consistently, and you’ll lose fat.
If you’re training for a race, the distribution of your effort across zones matters more than any single number. Most successful training plans follow an 80/20 principle: about 80% of your runs are easy (Zones 1 and 2), and 20% are hard (Zones 4 and 5). This approach builds a deep aerobic base while giving you enough high-intensity work to get faster.
The Aerobic Base Approach
One popular method for finding your ideal easy-run heart rate comes from coach Phil Maffetone. His formula: subtract your age from 180, then adjust based on your training history. If you’re just starting out, returning from injury, or frequently getting sick, subtract an additional 5. If you’ve been training consistently for at least two years with no injuries or setbacks, add 5.
For a healthy 40-year-old who’s been running consistently for a year, that gives a ceiling of 140 bpm for easy runs. The logic is that training below this threshold builds aerobic fitness without triggering excessive stress. Pushing into anaerobic effort too frequently is linked to overtraining, injury, and burnout. Runners who follow this approach often feel frustratingly slow at first, but over weeks and months they find they can run faster at the same heart rate, which is a direct sign of improving fitness.
How Fitness Changes Your Heart Rate
As you get fitter, two things happen. Your resting heart rate drops, and you can run faster at the same heart rate. The average adult’s resting heart rate sits between 60 and 100 beats per minute. Endurance athletes typically rest at 40 to 50 bpm, and even lower during sleep. A lower resting heart rate means your heart pumps more blood per beat, so it doesn’t need to work as hard.
This is why comparing heart rates between runners is pointless. A fit 45-year-old might cruise at 135 bpm on the same pace where a beginner’s heart is pounding at 170. The zones are personal. Track your own numbers over time rather than benchmarking against someone else.
Gauging Effort Without a Monitor
If you don’t have a heart rate monitor or chest strap, the talk test is a reliable stand-in. During moderate-intensity running, you can talk in full sentences but couldn’t sing a song. During vigorous-intensity running, you can only get out a few words before needing a breath. If you can sing, you’re probably in Zone 1. If you can’t speak at all, you’re at or near your max.
Wrist-based optical heart rate monitors on running watches have improved significantly but can still lag during intervals or read inaccurately when the watch shifts on your wrist. Chest straps remain more reliable for real-time accuracy. Either way, perceived effort and the talk test are always available as a cross-check. If your watch says you’re in Zone 2 but you’re gasping, trust your body.
Signs You’re Pushing Too Hard
Running at a high heart rate isn’t inherently dangerous for healthy people, but certain warning signs mean you should stop. Dizziness, chest pain, an irregular or fluttering heartbeat, and feeling like you might pass out are all reasons to walk and recover immediately. Extreme breathlessness that doesn’t improve when you slow down is another red flag.
A heart rate that stays elevated well after you stop running, or a resting heart rate that’s 10 or more beats above your normal baseline in the morning, can signal overtraining or the early stages of illness. Paying attention to your resting heart rate each morning is one of the simplest ways to monitor recovery.