42 year old can have a FitnessAge of 64 or
24, depending on how well they have looked
after themselves. For example, if this 42
year old had neglected their health and
fitness and their FitnessAge is 64, this
means they are performing at the same level
as the average 64 year old.
the flip side, look at fitness legend Jack
LaLanne. The original workout king is 86, but his daily workouts help him maintain the physical condition of an average 29 year old.