Pointing out my weaker physical conditions and too much activity may worsen my condition...then,reminding my CEO that if I become crippled or unable to be mobile, she would no doubt have to wait on me "hand and foot"...worked sometime.
Try it and let me know how it worked out!
One note of caution...it could back-fire and she becomes the one that requires that kind of care.
We've passed that point for the time being. I bet diabetes and skin cancer, she called with knee replacements and raised with back surgeries. I folded!