I was just out cutting wood and felt increasingly weak and tired.I stopped and when I came inside I checked my heart rate. 52 beats per minute. Thats about my resting heart rate. Whats odd is my heart rate should have gone up while I was chopping wood. Instead I just felt weak and decided to stop. I consider myself in good shape. Ran alot when I was younger. I checked my heart rate 10 minutes later (after a bit of food) 47 beats per minute. Ive been playing badminton regularly, very good workout, not your back yard badminton, so Ive been getting regular intense workouts. My theory is my body is signalling me to relax so my heart muscle can heal itself. What do you think?
Your low heart rate is probably due to increased legal tone which is seen in athletes and people who are very physically active. Any physical activity beyond a point can cause muscle fatigue. If you were not short of breath or getting palpitations or chest pain AFTER you stopped your activity I would not worry too much. Still, just to make sure get an EKG done.