Some suggested intense warm ups include: High Knees (20s interval), Quick Feet (10 yds), Split Lunge (20s interval), Jumping Jack with a Side Shuffle ... Zois, James, et al. “High-Intensity Warm-Ups Elicit Superior Performance to a Current Soccer Warm-up Routine. “Journal of Science and Medicine in Sport, Elsevier, 9 Sept. 2011, https: ...
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