Get rid of the pool scene!!!
I am obese like Rosemary, and I am also a regular swimmer. I can do a respectable continuous length backstroke. True, there are not that many of us. So the pool scene here in this movie makes the movie offensive to me.
First, big people like Rosemary do NOT jump in swimming pools; the water pressure that goes up your nose HURTS LIKE HELL. The more you weigh, the worse it is. You actually won't see obese people doing cannonballs (unless they're drunk). We use the ladders, stairs, or slip in from the side.
Second, bikinis in our sizes are hard to find, and if you have stretch marks, you wear tankinis or one-piece suits anyway.
Third, if I wanted to jump in a pool, I do not have the force to send someone in a tree. If I jumped in a pool simultaneously with the entire Olympic swim team, we could not send someone into a tree.
If there is one thing that big people need, it is plenty of exercise. Swimming is one of the best to do for yourself. So why exaggerate a scenario to discourage people from getting this form of exercise?