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Dev finds out what his DNA says about his fitness - and if he could run like Usain Bolt. Sprinter Asha Philip puts him through his paces before they compare their genomes.

This has all become possible because the cost of genome sequencing has plummeted. Today, for just 拢100, you can find out about specific genes in your DNA that help you improve your fitness or tell you if you should avoid certain foods. Welcome to the world of personalised genomics.

By looking at certain genes which research has shown are connected to specific traits, the genetic tests offered by the personal genome testing market give a snapshot of information from your DNA. So, it may show if you are likely to be intolerant to milk, or can't metabolise fat or sugar well. They also look at the types of muscle fibre associated with different athletic traits - like sprinting or long distance running - to suggest what your body may be more suited to.

But your DNA is only part of the story. Your environment - what you eat and drink, and how and where you live through your whole life - impacts on how your genes work, and how your body functions.