Is there a limit to human endurance?

[Still Waters]

From the Ironman triathlon to the Tour de France, some competitions test the limits of even the toughest endurance athletes. Now, a new study of energy expenditure during some of the world's longest, most grueling sporting events suggests that no matter what the activity, everyone hits the same metabolic limit—a maximum possible level of exertion that humans can sustain in the long term.

When it comes to physical activities lasting days, weeks and months, the researchers found, humans can only burn calories at 2.5 times their resting metabolic rate.

Not even the world's fastest ultra-marathoners managed to surpass that limit, the researchers found.

https://phys.org/news/2019-06-limit-human-science.html

[Space Commander Travis]

Yes, as anyone who devoted their lives to following the Brexit debates on the Parliamentary Channel would tell you. 

[zep73]

17 minutes ago, Still Waters said:

From the Ironman triathlon to the Tour de France, some competitions test the limits of even the toughest endurance athletes. Now, a new study of energy expenditure during some of the world's longest, most grueling sporting events suggests that no matter what the activity, everyone hits the same metabolic limit—a maximum possible level of exertion that humans can sustain in the long term.

When it comes to physical activities lasting days, weeks and months, the researchers found, humans can only burn calories at 2.5 times their resting metabolic rate.

Not even the world's fastest ultra-marathoners managed to surpass that limit, the researchers found.

https://phys.org/news/2019-06-limit-human-science.html

Love it! It's math and science in action! No superhuman powers anywhere. just the basic facts.