Everton midfielder Osman enjoying Martinez training
Osman, 32, explained that Martinez's arrival has lead to a change in the type of training the players take part in - and that there has been a hugely positive response.
He told evertonfc.com: "We have been doing bits in training and games which is similar to last year - but also bringing in some of the manager's new ideas.
"It's been new, it's been challenging but it's been good. It's different to learn new systems; we are learning how the manager likes to play three at the back at the minute, to complement how we play with four at the back."