Write for your reader, not yourself.
Use pronouns when you can.
State your major point(s) first before going into details.
my guess is that it won't grow back because once it's cut, it won't grow back.
Walking, and running. just draw stick figures doing those actions.
To improve <span>cardiorespiratory fitness a person should participate in aerobic exersises of moderate intensity for approx. 30 minutes threeto four times a week</span>