After a dismal run of results, the Cherries have hit a bit of form with two wins against West Ham and Swansea moving them nine points clear of the relegation zone.
Cook has said a lot of the credit for that has to go to club legend and coach Fletcher, who has looking after the back four and restoring confidence.
"At 44, I don't think there's many better in the air than him," Cook told the BBC. "The coaches are always thinking.
"You're never done, I don't think, at this club.
"It's been helpful and we've been working really hard on the training pitch with Fletch."