Explanation:
Bruno should
Try to spend some time outdoors every day.
Plan his physical activity for earlier in the day, not right before he goes to bed.
Stay away from caffeine (including coffee, tea, and soda) late in the day.
If he has trouble sleeping at night, limit daytime naps to 20 minutes or less.
Im not quite sure but i would go with
1. changing to a completely new type of activity - overcoming a plateau
2. making your goals easier - restarting after a break
The study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations.