Vertical jumps and mean propulsive power (MPP) in the jump squat (JS) and Olympic push press (OPP), pre and post 6 weeks of preseason in under-20 soccer players.

<p>Vertical jumps and mean propulsive power (MPP) in the jump squat (JS) and Olympic push press (OPP), pre and post 6 weeks of preseason in under-20 soccer players.</p

Schematic representation of a typical weekly training schedule and total training volume during six weeks of a soccer preseason.

<p>Schematic representation of a typical weekly training schedule and total training volume during six weeks of a soccer preseason.</p

Sprinting velocity (VEL) and change of direction (COD) speed, pre and post 6 weeks of preseason in under-20 soccer players.

<p>Sprinting velocity (VEL) and change of direction (COD) speed, pre and post 6 weeks of preseason in under-20 soccer players.</p

A schematic presentation of the Zig-zag COD speed test.

<p>The gray circles represent the position of the photocells.</p