Lacing up for a 5k marathon? In case you are not a regular runner, it will be difficult for you to complete the race and you may injure yourself during the marathon. You need to follow a 4-week fitness routine to improve your running and ace the long-distance races. Nisha Varma, an American College of Sports Medicine certified exercise physiologist, shares the week 2 fitness routine for 5k marathoners. The focus for the week is speed.
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