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Frequency is one of the best ways to improve your technique and, ultimately, your efficiency. This holds true even if each session is very brief. For example, if you have only two hours a week to devote to becoming a more efficient swimmer, swim four times a week for 30 minutes each time. More frequent, short sessions will improve your efficiency faster than a few longer workouts. Plyometric exercises have also been shown to improve economy in both runners and cyclists. These exercises
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