eli5 Why can’t humans sprint a marathon?
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probably a great example of this is cycling, team events… some teams have great sprinters who can put a huge amount of force into the pedals and can go past what most people would consider normal limits, these sprinters will go deeeeeeeeeeeeeeep into the red, pushing their bodies limits way past what is sustainable for any prolonged period of time. they are a mess after the sprint
to get their sprinter to the line teams do lineouts, they have big engine humans who can do turns at a fast pace for maybe 30 seconds to 1 minute… a dude who can do a slightly less high pace for 1minute to two minutes etc… teamies who will control the pace for an hour before that so their sprinter will be in peak condition as they get to the end. they all ride at the limit of what they can sustain. its fast, but they could go faster for shorter periods.
they all do their turn in getting their sprinter as close to the line as possible in peak condition so he can then do his few seconds he can go deep into the red and contest the sprint over the last few to a few hundred metres in a 150km race
you can only go so deep into the red for so long. you can probably run fast for a long time with enough training, but you can only sprint so long before your body just up and nopes out.
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