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Marvin Musquin has released footage of his laps with Litpro that he uses to help him train and become faster but it also shows the level he is pushing his body too – and that’s not even in a race.

Musquin is chasing Webb in the video to give him some competition as his heart rate hits 175/176 bpm, with his polar heart rate monitor, again showing why mx/sx is such a physically demanding activity. 

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