The First Phase
On the morning of time 1, the participants were asked to arrive at a designated place in the fasting state at 7 AM. Venous blood samples were collected from the elbow, and body weight, waistline, and hipline were measured. At the same time, the researchers instructed them to complete the food frequency questionnaire and physical activity questionnaire one-on-one. From time 1 to time 2 (day 45), the participants in group DPI received remote dietary and physical activity intervention, and the participants in group PI received remote physical activity intervention. The weight, waistline, hipline, blood pressure, and blood glucose of the participants in both groups were monitored. The participants in group C did not receive any intervention, and each of them was given a health education book on a reasonable diet at time 1.