pubmed
Effects of concentric and concentric-eccentric resistance training on speed and force in adult soccer players.
Bokůvka D; Vencúrik T; Zghal F; Colson SS; Paludo AC
Researchers studied two types of strength training in soccer players to see how they affected speed and strength. Players who did these exercises got stronger legs, but their speed did not change much. The concentric-eccentric training helped the most with strength, so trainers can use these exercises to make players stronger.
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