It’s a common misconception that strength training exercises don’t increase your heart rate in the same way as aerobic exercises. Sure, running, cycling, swimming, and other aerobic exercises are going to increase your heart rate and blood pressure. Strength training exercises like weight lifting, however, will also increase your heart rate.
After all, your muscles require oxygen to lift heavy weights, so your heart rate will increase to support them.
Whilst it’s pretty standard for your heart rate to increase by 70-85% when doing aerobic exercises from your maximum heart rate. To calculate your maximum heart rate, subtract your age from 220 (so a 35-year-old would have a maximum heart rate of 185 BPM).
It’s not easy to say what your heart rate should be while lifting weights because our bodies and hearts are all built differently. There are lots of factors that will change your heart rate when lifting weights, ranging from how often you lift to any underlying health issues.
There will be people who will have an elevated heart rate to support their muscles and bones to lift heavy weights. This is usually the case with overweight and obese people, as their heart rate is forcing the body to consume more oxygen to support their muscles.
People who are new to weight lifting, or those with health issues such as heart problems or obesity, will find that their heart rate might be higher than they would think. This can be met with side effects such as dizziness, nausea, chest pain, irregular heartbeat, and shortness of breath.
People with high cholesterol and high blood pressure should be cautious about not overdoing it with heavy weights. To avoid your heart rate from increasing too quickly, you should start slowly and with light weights. You should properly rest between reps and follow the guidance of your trainer or doctor who will be able to monitor your heart rate alongside you.
You should pay attention to your heart rate after lifting weights. It’s normal for your heart rate to be elevated once you have finished exercising, but if it hasn’t gone down to your resting heart rate by itself, you should consult your doctor. Of course, other factors could contribute to this such as caffeine pills or energy drinks, but you shouldn’t ignore any irregularities in your body - especially if you are over 40 as you are more exposed to health issues.
In short, it’s not easy to say what your heart rate should be when lifting weights. On average, a healthy person’s heart rate will increase by 60-85% from their maximum heart rate when lifting weights. This is because the muscles require oxygen for support, so the heart will deliberately fasten to force you to breathe more.
However, other factors will affect your heart rate, including health issues such as obesity, high cholesterol, and high blood pressure. You should always consult with a doctor and trainer before lifting weights if you have a health issue.