Another sport that is often considered to be a beacon of health and endurance is cycling which is also far more dangerous than simply juicing. And you’d think that the majority of people dying in this sport would be because of accidents, but the truth is that pro cycling fatalities normally happen because of heart attacks. A good example of this epidemic was in the mid-2000’s when 8 different professional cyclists under the age of 36 died in a 13 month span due to heart failure. And if you’re looking for reasons why this happened then consider that the paramount of cycling in the Tour de France sees a rider’s heart fluctuate from 60% – 100% of its capacity for five hours a day. The crazy thing is that, over the 23 days of the competition, the riders only rest for 2 days.