To estimate your heart rate during physical activity, such as doing 30 seconds of jumping jacks, we can take into account that your resting heart rate is relatively low. A resting heart rate of 26.25 beats per minute is significantly lower than normal for a 13-year-old, as typical resting heart rates for adolescents usually range from about 60 to 100 beats per minute.
When you engage in aerobic activity like jumping jacks, your heart rate will increase to supply more oxygen to your muscles. The increase in heart rate can vary widely depending on your fitness level and overall health.
While it's difficult to provide a specific heart rate without a more detailed fitness assessment, during moderate to intense activity, it's not uncommon for heart rates to rise significantly:
- For most people, a heart rate can increase by 50-100% of the resting rate during physical exertion.
- If we consider an average increase for moderate activity, your heart rate could rise to about 2-3 times your resting heart rate.
If we take an average of your resting heart rate (let’s say around 26 beats per minute), you might expect your heart rate to rise roughly to between 100-150 beats per minute during an activity like jumping jacks.
However, given your resting heart rate is significantly below average, I would strongly recommend consulting with a healthcare provider to ensure that it is safe for you to engage in vigorous physical activity. It's essential to ensure your health and fitness levels are appropriately assessed.