How do nutritional needs change from young adulthood through old age?

Fewer calories are needed.
Fewer vitamins are needed.
More water is needed.
More protein is needed.

What is the difference in the phisical activity requirements for achieving healt benefits and performance?

In a study of a weight loss program, 40 subjects lost a mean of 3.0 lb after 12 months. does the weight loss program have practical significance? a. yes, because the weight loss program worked and the subjects lost a mean of 3.0 lb. b. no, because the mean weight loss of 3.0 lb after one year does not seem to justify the program. c. no, because the sample of 40 subjects was too small to determine if the program was useful. d. yes, because the mean weight loss of 3.0 lb after one year does seems to justify the program.

Example of health promoting behavior