4. Are you aware of your irregular dietary and sleep habits (e.g., sedentary behavior, staying up late, craving sweets, fragmented sleep) and willing to make changes? A. Unaware of problems and have no intention to change (Precontemplation Stage) B. Aware of problems and intend to change within 6 months (Contemplation Stage) C. Determined to change and plan to start within 1 month (Preparation Stage) D. Have started changing bad habits for less than 6 months (Action Stage) E. Have maintained healthy dietary and sleep habits for more than 6 months (Maintenance Stage)
5. How many times have you tried to improve your irregular dietary and sleep habits? A. Never B. 1-2 times C. 3-5 times D. More than 5 times
6. Do you relapse into bad habits during the behavior change process? A. Never B. Occasionally C. Frequently D. Never succeed in changing
7. What is your possibility of suffering from obesity, chronic fatigue, endocrine disorders and other health problems caused by long-term irregular diet and sleep? A. Extremely unlikely B. Unlikely C. Moderate D. Likely E. Extremely likely
8. Will health problems caused by irregular diet and sleep greatly affect your study, daily life and physical health? A. No impact at all B. Slight impact C. Moderate impact D. Great impact E. Severe impact
9. Will bad living habits reduce your athletic ability, energy level and self-control? A. Definitely not B. Unlikely C. Neutral D. Likely E. Definitely yes
10. Do you agree that regular diet, early bedtime and reducing high-sugar and heavy-tasting food can effectively relieve fatigue and control weight? A. Strongly disagree B. Disagree C. Neutral D. Agree E. Strongly agree
11. Do you agree that developing a healthy lifestyle can improve learning efficiency and daily energy status? A. Strongly disagree B. Disagree C. Neutral D. Agree E. Strongly agree
12. What are the main obstacles for you to change bad living habits? (Multiple choices allowed) A. Heavy academic and club tasks with no time to adjust B. Hard to resist craving for sweets and heavy-tasting food C. Staying up late habit and difficulty in falling asleep early D. Lack of supervision and insufficient self-control E. Lack of professional guidance on healthy habits F. Others:
13. How difficult is it for you to maintain a healthy lifestyle? A. Not difficult at all B. Slightly difficult C. Moderate D. Quite difficult E. Extremely difficult
14. Which factors will motivate you to change bad living habits? (Multiple choices allowed) A. Physical health deterioration B. Reminders from family, friends or teachers C. Professional course learning (e.g., physical health courses) D. Demonstration of healthy lifestyle from others E. Changes in body weight and body shape F. Others:
15. Your usual dinner time A. Before 18:00 B. 18:00-19:00 C. 19:00-20:00 D. After 20:00
16. Daily sedentary time (studying or entertaining on screen) A.Within 4 hours B. 4-6 hours C. 6-8 hours D. More than 8 hours
17. Your usual bedtime A. Before 22:30 B. 22:30-23:30 C. 23:30-00:30 D. After 00:30
18. Times of waking up at night A. 0-1 time B. 2-3 times C. 3-5 times D. More than 5 times
19. Frequency of consuming desserts, milk tea, barbecue, spicy hot pot and other heavy-tasting food A. Rarely B. 1-2 times a week C. 3-4 times a week D. Every day
20. Do you have strong craving for desserts and snacks after 21:00? A. Never B. Occasionally C. Frequently D. Every day