The X-Berg Challenge is a unique concept where the challenge is to either fly, run or cycle through pre-set "dots/turn-points".
Best for pro performance on a journeyman's budget.
These leg muscles can often be the root of lower-back pain and knee problems.
Watch the unveiling of the full route of the 100th edition of the Tour de France LIVE at 11h30 TODAY right here.
2013 Tour de France
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