The Irish midfielder has been forced to take it easy on the training pitch.
The Republic of Ireland international’s importance in the Toffees’ starting XI continues to grow, but his momentum at the club has been blighted in the past by a host of debilitating injuries.
McCarthy has looked like a man eager to prove a point this season, with his work-rate, aggression and poise on the ball key elements of the Merseyside club’s play.
However, avoiding niggling injuries and keeping fit has been a priority for the former Wigan man, who has revealed that he has been forced to tone it back in training by boss Roberto Martinez.
“We changed a few things, the boots and insoles since I went through the spell of picking up hamstring after hamstring injury,” McCarthy is quoted as saying by The Liverpool Echo.
“It was frustrating but so far, so good and I’ve also changed my training style.
“I’ve come through since February but won’t be getting too far ahead of myself because anything can happen with hamstrings.
“But as much as I can, I look after myself in the gym and off the pitch and in training as well.
“At times he’s (Martinez) maybe not let me do as much training and looked after the volumes. They looked into every single detail.
“You want to train as much as you can but I’m still doing plenty and before and after training I need to work on things. The manager is just watching what I do.”
McCarthy signed a new five-year contract extension with the Merseyside club in the summer and is widely accepted as an important member of an able Everton side with lofty ambitions this season.
The Irish midfielder is set to step out for the Toffees later today against Manchester United at Goodison Park, with his combination in the boiler room with Gareth Barry an essential element to the home side’s chances of victory.