Sports scientist Anton McElhone has worked closely with Ange Postecoglou at Celtic and speaks to BBC Sport about his methods.
www.bbc.co.uk
Worth a read. Someone with the qualifications to know said this:
“BBC Radio 5 Live's Monday Night Club spoke to sports scientist
Anton McElhone, who worked for Postecoglou at Celtic and for Tottenham under Mauricio Pochettino.
"Ange is very clear 'This is how I do it at each club.'
"The players will adapt to it over the months. It was a collaboration. He wanted us delivering the philosophy of 'football first' - everything must start and end with the ball.
"Ange is very good at giving players time off, time to reflect. The training volume is good. “
Mauricio Pochettino brought in front-foot football at Spurs. But to get that style, it probably took six to 12 months. The intensity was through the roof.
"It's survival of the fittest for players. You need to be young, you need to be healthy, you need to have a certain physicality about you, and a mentality to get through that.
"To get that in the Premier League, you do have to train quite extensively for it. But you need the right tools, by that I mean the right players. They need to be robust enough, and I don't know at the moment at Tottenham…
Ange is his own man, he's an exceptional leader and very strong and understanding, and has a good background in sports science and education from Australia."
At Celtic after six months Postecoglou could rotate the front five at 65 or 65 minutes to keep the freshness for the 60-game season," reflected McElhone.
"At Tottenham he's probably found that a lot more difficult because I don't think the strength in depth is the same as other Premier League clubs like Manchester City and Chelsea.
"Look at the evolution at Celtic under Postecoglou, we had a three-month period of sustaining injuries every week, mostly hamstring injuries. We had to get to the winter break to reset."
"As the players adapted to the demands of the system, the game fluctuation changed rather than that constant 'basketball' up and down the pitch, the team was able to control one half of the pitch more.