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Improve your running speed with the Sprinter Workout. The routine can be done indoors as well as outdoors (High Skips & Straight-Leg Bounds). Sprinting is broken down into three stages: explosion, acceleration, deceleration. In terms of the 100m...

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How to work out every single muscle in your legs:
from BuzzFeed

19 Cheat Sheets To Help You Work Out Like A Pro

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