Former Celtic defender Tom Boyd told the Glasgow Evening Times that he feels it’s obvious the Bhoys are a fitter team than they were last season.
One of the core qualities that Deila has developed since he arrived at Parkhead, is an emphasis on every player having a very high fitness level.
That allows the Bhoys to work hard both on and off the ball, as they go about looking to produce complete performances in all competitions.
“I do think you can see that they are a fitter team than they were,” he said.
“I think if you look through the squad there are a number of players who look as though they have slimmed down by a fair few pounds and, at this level, and when married to the ability that you have, it can make a difference.”
Increased fitness levels are beneficial for a number of reasons, with one of the main ones being the idea that players don’t become fatigued late into games.
If the Bhoys can maintain their intensity next season, they will be well placed to take advantage when opposition sides get a little tired and take their eye off the ball at key times.
The crucial period for Deila over the next two months is when the squad meets up again for pre-season training.
Celtic’s season starts sooner than the majority of other European clubs and that means he has to push his players harder in training.
There needs to be a balance because some of Celtic’s players have only just finished the latest round of international games and will need a fair and well deserved rest over the next couple of weeks.