It's prob simpler to just learn the lesson that "improve" doesn't mean "go up". And unlike the words "reduce" and "mitigate", you can use "improve" with a list

It's prob simpler to just learn the lesson that "improve" doesn't mean "go up". And unlike the words "reduce" and "mitigate", you can use "improve" with a list of things that don't all swing the same direction. e.g. "By eating creatine, I improved my blood pressure (down) and bench press (up)."