We know that everyone's challenge is personal & individual to them. Some people use the Concept2 rowing machine to beat a 2k personal best, or to row a daily target of 10k or even to row a marathon for charity. Some of you use the rowing machine to help you to lose weight or to generally just get fitter.

British adventurer Sarah Outen uses the rowing machine to help with her endurance. As an endurance athlete Sarah sets her sights higher than most of us 'mere mortals' can even dream of.

Sarah has already rowed solo across the Indian Ocean (http://www.sarahouten.com/meet-sarah/indian-ocean/) & her latest challenge London2London: Via the World, is a two and a half year expedition that will see Sarah use only human power to complete a loop of the planet.

Sarah originally set off on the 1st April 2011 from London's Tower Bridge with the intention to cycle 16,000 miles, row solo across 7,500 nautical miles of ocean and kayak 300 nautical miles before arriving back at Tower Bridge. Sarah cycled and kayaked more than 11,000 miles from London to Choshi, Japan before she had to be rescued. Unfortunately after 26 days of her record-breaking solo row across the North Pacific Ocean from Japan to Canada, she was hit by Tropical Storm Mawar and was unable to continue. She is now in the UK making plans for a continuation of the L2L journey. So, watch this space...

Once completed, the journey will see her cross two oceans, three continents and 14 countries.

Sarah kindly sent us this picture of her at a pre Christmas training camp on her trusty Concept2.

The final session of day 1 involved a

2k sprint 30 min max distance intervals: 5k, 2k, 1k capped rate

The first part of the day was power circuits, strength circuits and functional circuits. Which Sarah assures me was 'all good fun'.

Check out Sarah's website as she breaks records, blazes trails and shares her adventure as she goes

http://www.sarahouten.com/