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I like to take up something that is challenging. I like to stretch myself.

It's nice to be able to do more and to always challenge myself.

The only way to grow is to challenge yourself.

I try to challenge myself as much as possible, as often as possible.

You always have to challenge yourself or else you get soft. Right?

I think in life we want to challenge ourselves.

I love to challenge myself.

I think you're always trying to challenge yourself to do new things and not repeat yourself.

I think in life, if you continue to challenge yourself, you can pride yourself in what you continuously accomplish.

I think it's quite great to set yourself a big challenge, and then you've got another reason for keeping fit.