Answer
One would need to collect data on the major factors that influence health. The list would include basal metabolic weight/index (BMI), diet, activity/exercise leves.
Work Step by Step
Environmental factors also have significant effects on general and reproductive health. One would therefore also need to collect information on exposure to toxic chemicals, as well as exposure to radiation and heat. It may also be useful to consider socioeconomic conditions that affect the degree of stress that impact subjects being studied
