Celtic skipper Scott Brown has branded former boss Ronny Deila's training sessions "slow" and not hard enough.
Brown is playing some of the best football of his career after a disappointing end to the last campaign, which ended prematurely for the 31-year-old amid hamstring problems.
The retired Scotland international scored the winner against Dundee on Saturday after shining in the 3-3 Champions League draw with Manchester City days earlier.
And the midfielder has credited manager Brendan Rodgers and his staff with playing a major role in his revival in fortunes.
Brown told the Evening Times: "I think it all starts going into training. The training has been great, as have the physios and coaches.
"It wasn't always like that last year. It didn't always put a smile on your face when going into training. It was difficult, it was slow, the training itself wasn't hard enough.
"This season, all the lads are enjoying it, they want to work hard. It doesn't matter if it's Monday, Tuesday, Wednesday, Thursday or Friday; training has been exceptional."