Why does it seems that children usually have a much greater physical disposition/stamina than the average adults?

Question

I mean specifically for very young children such as toddlers. It seems that, as a rule of thumb, they are much more physically motivante than the average (say, 30 years old or so) adults, barring those who actually practice regular exercise. Some children seem like they can run, climb and jump with a consistent timing for longer than many adults.

Is it because our own disposition has been ruined by a generally sedentary lifestyle?

In: Biology

Answer 1

Mostly the square cube law. A toddler 1/2 of my size will have around 1/8th of my mass but 1/4 of my strength. He uses far less of his strength to move around.