Does sprint and jump performance of football players from a Premier League academy change throughout the season?

ConclusionRegular football training routine (without systematized plyometric or sprint training) was able to enhance sprint and jump performance of footballers from under-14 to under-16 teams, but this training regime was insufficient to improve such abilities of older players (under-17 to under-19 teams).
Source: Sport Sciences for Health - Category: Sports Medicine Source Type: research