There are many benefits to including the treadmill in your training routine, as they are a low-impact and versatile workout option that you can enjoy no matter the outdoor conditions. I personally include an incline walk at the end of every strength training session.
Treadmills also supply metrics, including calories burned and your heart rate during a walk or run. However, is this information reliable? Are heart rate monitors on treadmills accurate? Keep reading to find out!
Are heart rate monitors on treadmills accurate?
Heart rate monitors on treadmills can give a rough estimate of your pulse, but they’re not always precise. One NIH study that focused on subjects who would walk or jog at a lower speed found that “20-70% of the readings given by the machines had errors of greater than 20 bpm. In some cases, over 50% of readings had errors exceeding 50 bpm.”
Most treadmills use hand grip sensors that detect your pulse through electrical signals in your skin. While this method works in controlled conditions, accuracy can drop if your hands are sweaty, your grip is inconsistent, or you move around during the reading. Built-in monitors also have a slight delay in reflecting changes in heart rate, which can be an issue during high-intensity intervals. Other factors like skin temperature, hydration, and even the treadmill’s calibration can further impact results.
For casual exercise tracking, treadmill heart rate monitors are fine for spotting general trends. However, if you need accurate, real-time data for training or health purposes, a chest strap or quality wearable monitor will give you far more reliable readings.
How you could use inaccuracy as a baseline
Even if a treadmill’s heart rate monitor or calorie counter isn’t perfectly accurate, it can still be a useful tool for tracking progress. The key is consistency.
If the treadmill is consistently overestimating or underestimating numbers, you can still use those numbers as a personal baseline. For example, let’s say your goal is to burn 100 calories. The treadmill might not measure that figure exactly, but if you work toward burning 110 calories next time, you’ve still increased your effort.
The same applies to heart rate readings. If the monitor always reads slightly higher or lower than reality, you can still note changes over time to gauge improvement.
By using the treadmill’s metrics in a consistent way, you can measure relative progress and keep yourself motivated — even if the numbers aren’t 100% precise.
How else can you measure your heart rate?
There are several ways to measure your heart rate beyond using a treadmill’s built-in monitor.
One of the most accurate methods is a chest strap heart rate monitor. These devices track electrical signals from your heart and send real-time data to a watch, phone, or fitness equipment. Many athletes prefer chest straps for their precision during both steady-state and high-intensity workouts.
Another option is a wrist-based fitness tracker or smartwatch. While generally less accurate than chest straps, they’re convenient and can track your heart rate throughout the day.
You can also measure your heart rate manually. Place two fingers on your wrist or neck, count the beats for 15 seconds, and multiply by four to get your beats per minute.
Whether you choose high-tech tools or manual checks, finding a method that works for your routine will help you better understand your effort and recovery.
What does your heart rate tell you about training?
Your heart rate can reveal a lot about the effectiveness and intensity of your training.
During exercise, a higher heart rate generally means you’re working harder and burning more energy. Training within specific heart rate zones can help you target different goals — for example, lower zones improve endurance, while higher zones build speed and cardiovascular capacity.
Tracking your heart rate over time can also show improvements in fitness. As you get stronger, you may notice your heart rate is lower at the same pace or workload, indicating greater efficiency.
Resting heart rate is another useful metric. According to the Mayo Clinic, “A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.” If you notice any sudden spikes, this may signal overtraining, stress, or illness.
By understanding your heart rate patterns, you can better tailor your workouts, recover more effectively, and avoid pushing too hard — making it a valuable guide for smarter, safer training.
Frequently asked questions
What should my heart rate be when I’m on a treadmill?
Your ideal treadmill heart rate depends on your age, fitness level, and goals. For moderate-intensity cardio, aim for 50–70% of your maximum heart rate; for vigorous workouts, 70–85%. You can calculate your max by subtracting your age from 220, then adjust your effort to match your target zone.
Is 200 bpm on a treadmill okay?
A heart rate of 200 bpm on a treadmill is quite high for most people and may signal overexertion, especially if you feel dizzy, short of breath, or unwell. Maximum heart rate varies by age, so 200 bpm could exceed safe limits. Stop exercising and seek medical advice if you have any concerns.
Why is my treadmill heart rate wrong?
Treadmill heart rate readings can be inaccurate due to poor hand grip contact, sweat interfering with sensors, or natural delays in detection. Built-in monitors often estimate rather than measure directly. For more reliable results, use a chest strap or wearable device designed for continuous, precise heart rate tracking.
