Why the average weight for humans is close to 70 kilogram and not 140 kilogram?

Answer 1

Answer

First of all, the average weight for humans is always changing. 100 years ago, people were smaller then they are now. The reason for this is not easy to define but the reason why weight is changing is simple... evolution. Maybe humans who are larger survive better and have a better chance to reproduce compared to smaller humans, and this is why humans have grown. Possibly, in the future, if weighing up to 140 pounds helped to our survival, then maybe we will evolve to that level. However, this will take thousands of years to occur. For more information, research Darwin and natural selection.

Whoever wrote the above answer understands absolutely nothing about evolutionary Biology. Any changes in the gene pool for human body size in the past century have been a marginal factor compared to the per capita consumption of food increasing from adequate to excessive in some industrialized countries, contributing to obesity (e.g., the United States). While the availability of measurements for all human populations is limited, 70 kg is likely in the area of average body mass, as opposed to 140 kg, which would erroneously diagnose the average person in the world as morbidly obese. There is no reason that obesity would be adaptive, but evolutionary history does suggest that humans still have paleolithic "feast or famine" genes for living with much scarcer food supplies than the excesses that currently exist in industrialized nations, resulting overeating in the presence of constantly elevated food supplies.

Answer 2

1 kilogram is 2.2 pounds

most people weigh around 70 kilograms[140 pounds]

most people dont weigh 140 kilograms[280 pounds]