>>1768256>How much exercise is too much for the heart?>Image result for strenuous exercise limits for heart damage>The results showed that people who engage in physical activity that exceeds the recommended amount by at least three times were at an increased risk of developing CAC. This would be three times over the recommended 150 minutes of weekly moderate-intensity activity, or 75 minutes of weekly vigorous-intensity activity.In other words, if you are biking 100 miles at 10 miles an hour that is 10 hours of pedaling.
And since over 3 * 150 minutes or 450 minutes, which is 7.5 hours, it means about 2.5 hours or 25 miles from your destination your cardiac muscle cells can be expected to show signs of oxidation and cell death.
Not necessarily a death sentence but damage can be permanent so think about the consequences before you start riding a bicycle
