Frequency…refers to the frequency of exercise undertaken or how often you exercise.
Example: Increasing jogging 30 minutes twice a week, to jogging 30 minutes three times a week
Intensity…refers to the intensity of exercise undertaken or how hard you exercise.
Example: Increasing your jogging speed from a slow 4-5 mph jog, to a 5-6 mph jog
Time…refers to the time you spend exercising or how long you exercise for.
Example: Increasing your 30 minute jog to 45-60 minutes per session
Type…refers to the type of exercise undertaken or what kind of exercise you do.
Improving cardiovascular fitness may need types of exercise such as jogging, swimming, cycling, etc. Improving muscular strength may need specific exercises such as weight lifting or isotonic exercises.