Trey's 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 trey's family apply the fitt principles to make their walking routine more effective?

FITT principle : Frequency , Intensity , Time, and Type

- They can increase their exercise from 3 days per week  to 5 days per week ( increasing frequency)

- They can aim for a further distance during their exercise ( increasing intensity)

- They can increase the daily time from 20 minutes into 40 minutes (increasing time)

- They can change the exercise from walking to jogging ( changing the type)

Answercirculatory,blood moves oxygen;

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