`XII)`
`1` . F
`2` . T
`3` . F
`4` . T
`5` . F
`XIII)`
`1`. Because it can help to increase your strength and energy, giving you a stronger heart.
`2` . Because they don't carry the weight of their bodies on their feet when cycling.
`3` . You can have bad effects.
`4` . Twice or three times a week.
`5` . You will stop and take a rest.