It looks like she's trying to carry Sela, but can't lift her weight.
The parent post essentially confirms that. And Sela appears to be a little embarrassed about it, too.
Woman, you are basically six feet of pure muscle; there is no reason whatsoever to be even remotely ashamed of your weight. Hell, I’d be surprised if there was a single ounce of fat on your body aside from what’s in your rack.