If residents are enthusiastic about being healthy, helping them track their nutrition could be an excellent activity idea. Nutrition is a crucial part of being healthy overall. It's arguably more important than the amount of exercise one gets, but at least just as important! Residents can track what they eat on paper or through an app. Getting started and maintaining the habit is the rewarding part. Consider picking a health app with your resident and getting them used to using the app if they are comfortable with technology. A benefit of tracking one's nutrition is gaining a general awareness of what's a healthy choice when choosing to eat! This has immense power to improving your health. Things to track are calories and the three main nutrients in food: proteins, carbohydrates and fats (lipids).
Here is an article detailing the benefits of 5 nutrition tracking apps.
Check out the original idea here.