Okay, so I have no idea what internet circles you're traveling in. But I recently saw this video claiming to explain why people are saying an internet challenge can only be done by women and not men.

It's in Mandarin. It does not have non-Mandarin subtitles. Don't worry, I'll explain. 

Look, I like this YouTube channel. I like a lot of educational YouTube. But this explanation bothered me a lot, and at first I assumed I missed part of his explanation, but let me tell you: that's not the case!

So the challenge is simple: step two feet away from the wall (measured in your own feet), bend your head to balance against the wall, and lift a chair through yourself and stand up from the wall. If you can stand back up with the chair in your hands, you've completed the challenge.

The explanation the teacher gives is logical: women have shorter feet putting their feet close to the wall, and men might have a lot of upper body muscle (or fat) moving their center of mass closer. If your feet are closer than your center of mass, you can do it (because you have minimal torque or it torques you out of the bow). But if your center of mass is closer to the wall, it's torquing you towards the wall and standing up will be essentially impossible.

But here's the thing. Women have smaller feet, so they'll be closer to the wall. But they're also shorter. I don't see why there would be any sex-differential in completing the task. I did some back of the envelop math to check this: Average height in America is M: 69 / F: 63.5. Average shoe size is M: 10.5 / F: 9, and in inches, roughly M: 10.6 / F: 9.75 (though it varies). So calculating their distance from the wall as a percent of height we get (9.75 * 3)/63.5 = 46.1% for women and (10.6 * 3)/69 = 46.1% for men. Shockingly, the ratios are identical!

Which makes me conclude a couple things are possible here: (1) the internet is wrong, and there's no sex-differential in difficulty, (2) men are heavier than women, making it harder for a reason unrelated to shoe size, (3) women in China (where this seems to have been meme'd) are differently proportioned, or (4) there's a difference in relative leg/torso length between men and women that helps women get their feet under their center of mass better.

But I do think the explanation given in the video should be questioned. Is there an easy way to figure out which of the above options is the case?