There’s no way any form of exercise is comfortable for this woman. Not with breasts that look like they can burst at any moment.
I commend her for her commitment to wanting to work out though. You can overcome any obstacle, no matter how big (or small). And the fact that she’s grinning from ear to ear means that she knows how terribly huge her boobs are in comparison to her bikini top.
Maybe she’s grinning because she knows the slightest shift in weight could cause her chest to burst, or that top to come flying off. Either way is okay with us.