public function setSprinting($value = true)
{
$oldVal = $this->isSprinting();
parent::setSprinting($value);
if ($value !== $oldVal) {
$value ? $sprintSpeedChange = self::DEFAULT_SPEED * 0.3 : ($sprintSpeedChange = -self::DEFAULT_SPEED * 0.3);
$this->setMovementSpeed($this->getMovementSpeed() + $sprintSpeedChange);
}
}