Not to be that guy, but you can very easily find numerous scientific papers
[1][2][3] on the significant difference between male and female physicality. As an example, comparing the
Olympic weightlifting records shows that the current men's record for the lowest weight class (61kg) is almost equal to that of the women's for their highest weight class (+87kg), whereas the highest men's weight class is almost 150% in weight of that of the women's. Not to say that a woman cannot be stronger than a man, but generally speaking most men are just simply stronger than most women.
But this is just a comedy manga, so who really cares?