The correct answer to this open question is the following.
The study shows racial disparities in environmental health hazard (Group question)
So the question would be: How do environmental health hazards influence sedentary Americans to start a daily routine of exercise?
There are also other ways to pose a question such as the following. An individual question could be: How do environmental health hazards influence an individual to go jogging in the streets?
Regarding a culture question, it could be: Do racial disparities play an important role in environmental health hazards in Western Europe?