Treys family has been walking together for 20 minutes at least three days per week for the past four weeks they already have so much more energy and they want to continue to improve how could trace family apply the fit principle is to make their walking routine more effective

They already have the F and the two T’s down, (frequency, time, and type) Their routine will be more effective however, when they incorporate the I, or intensity into their workouts. Once they focus on the intensity of their workouts, they will avoid overworking themselves, and it will keep them working as hard as they can and getting the most benefit out of it.

Primary effectit is the most accurate.