Final answer:
As men and women age past 30, both body composition and weight tend to increase.
Step-by-step explanation:
The body composition and weight of men and women generally change as they age past 30. The most common trend is that both body composition and weight tend to increase. Aging leads to a decrease in lean muscle mass and an increase in body fat percentage, resulting in changes in body composition. Additionally, the body's metabolic rate decreases with age, which can contribute to weight gain.