triskaidekaphobia Is a very niche extreme fear of the number 13. Some people relate it to the fear of the day Friday 13th but that is a separate phobia though people with triskaidekaphobia are scared of the date as well.
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>
