I'm a bit concerned because I've been experiencing a fast heartbeat after I climb stairs or if I'm walking in the sun for just about 10 minutes. Even while cleaning a room, my heart rate seems to go up rapidly. I'm 20 years old, weigh about 65 kg, and I'm 5.4 inches tall. Could you tell me what might be going on?
A fast heart rate after climbing stairs or walking in the sunlight is often due to your body's increased demand for oxygen during physical activity:
Climbing stairs: When you climb stairs, your heart works harder to pump blood to your muscles, which increases your heart rate. This is called sinus tachycardia, which is a symptom, not a condition.
Sunlight: Physical activity can cause your heart rate to increase.