A former college adminstrator who spent years giving the MBTI has written a book about exercise based on the theory. There are 8 styles, or attitudes about exercise and fitness; based on your type or "color," different ways of working out will be more successful for you. In this case, successful includes feeling motivated enough to get to the gym, pool or hiking trail.
Here's a short preview:
Blue - safety oriented; good at creating space at a gym
Gold - traditional
Red - respond quickly to the physical world
White - planners who like calm spaces and don't like to be rushed
Green - nature beckons; like to be outside
Purple - routine-oriented
Saffron - like making workouts into play; value individual expression
Silver - like exercise to be disguised as fun and a way to meet people
There's a test here:
the8colorsoffitness.com - Home
Article here:
'The 8 Colors of Fitness' tries to motivate