How does physical activity affect the number of heartbeats per minute?

Physical activity directly affects the work of the heart. When we do energy-intensive work, muscle cells require more oxygen and faster gas exchange. Red blood cells cannot capture more oxygen and expel more carbon dioxide. Therefore, these increases can be organized by accelerating blood circulation. The heart begins to contract faster, and the pulse speeds up accordingly. But you must always monitor the frequency of strokes, since prolonged load has a detrimental effect on the circulatory organ.