The F.I.T.T. principle is
AFrequency, Intensity, Type and Time
BFit, Interval, Training, Time
CFitness, Intensity, Type and Travel
DFrequency, Interval, Type and Time
AFrequency, Intensity, Type and Time
BFit, Interval, Training, Time
CFitness, Intensity, Type and Travel
DFrequency, Interval, Type and Time