What positioning approach would be most valuable to the Phase 2 Fitness Center? Defend your answer.

Allen Goldschmidt loves exercise and fitness. At age 42 he survived a cardiac scare in which doctors first believed a heart attack had taken place. Even though subsequent tests determined such was not the case, Allen was told that being overweight and in poor physical condition might at some point lead to an actual episode. In response, he moved from a sedentary lifestyle to an activity-based approach to keeping trim and healthy.
After several months of developing his own program with the help of a fitness trainer, an opportunity arose. Allen was able to purchase a fitness center from an individual who was moving out of town and wanted to sell as much of the business intact as possible.
Allen and his trainer created a system that they named Phase 2. Their idea was that Phase 1 was an under-represented aspect of staying healthy: diet and lifestyle. They designed a program that encouraged members and visitors to eat right (low sugar, low salt, low fat, low calorie) but also to sleep in regular cycles and take steps to avoid the effects of stress, which can lead to other bad habits, such as alcohol abuse.