How to Use the Exercise Intensity Calculator
Safe exercise intensity varies by age and training experience. Using max heart rate (220 minus age) as a baseline, beginners should target 50–65%, intermediates 60–75%, and advanced athletes 70–85% of max HR. These ranges minimize overtraining risk while still producing fitness gains.
RPE (Rating of Perceived Exertion) is a practical alternative when no heart rate monitor is available. Beginners should aim for RPE 4–6 (can talk), intermediates RPE 6–7, advanced RPE 7–8.5. If your body weight exceeds 90 kg, prioritize low-impact exercise to protect your joints before progressing to high-impact activities.
Frequently Asked Questions
The standard formula is 220 minus your age. A 30-year-old's estimated max HR is 190 bpm. Target zones are a percentage of this value.
HR-based intensity applies equally to all weights, but higher body weight means more joint stress. Start with low-impact exercises (swimming, cycling, walking) before adding high-impact activities.
Excessive intensity leads to accumulated fatigue, immune suppression, musculoskeletal injury, and overtraining syndrome. Beginners especially must follow the progressive overload principle.