No matter what your test results are, just from your age and heart rate, you are no longer in a healthy state of exercise. The best heart rate range for your current age is within 150. If you often exceed this area, you are in danger. In addition, your body language (fatigue) has told you that your body can't bear the current amount of exercise.

Finally, the most important point is whether there is anything wrong with your heart. This is not something you go to the hospital for examination. If conditions permit, please check your blood pressure immediately after the iron strike.