Complex sentence: Shankly deplored long distance running on roads and insisted that, apart from warm-up exercises or any special exercises needed to overcome injuries, the players trained on grass using a ball.
Split into simpler sentences: Shankly deplored long distance running on roads and insisted that his players become fit by playing football and playing on grass. Apart from warm-up exercises or any special exercises needed to overcome injuries, the players trained on grass using a ball.