Sam’s inspired by the summer of sport and decides to get fitter with the help of a fitness watch.  But how does this handy gadget know so much about him?

Sam&rsquo;s inspired by the summer of sport and decides to get fitter with the help of a fitness watch.&nbsp; But how does this handy gadget know so much about him?

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

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