Liverpool captain Jordan Henderson believes two of Liverpool's summer additions to the backroom staff have helped the club to the top of the Premier League.
The club recruited Andreas Kornmayer from Bayern Munich as head of fitness and conditioning, while Mona Nemmer was appointed head of nutrition from a similar role at the Bundesliga champions.
"He's been brilliant," Henderson said of Kornmayer in an interview on the club's official website. "He's really come in and put his own stamp on what he wants to do and what the manager wants from the players.
"The lads get on very well with him, he's got a good relationship with all the lads, and he works us very hard, which is good. We've got a great bunch of lads that want to work, so that makes it easier for him, but the things he's done have definitely put us in good condition, as you can see out on the pitch in the performances and energy levels we've had.
"I feel very good at the moment, probably the best I've felt in years really in terms of my fitness and just in general.
"I think that's the same as everyone -- we're feeling good as a team, very fit, and I think a lot of that is down to preseason and the base we had, and we've built on that over the first few weeks of the season and we continue to do that in training.
"We're all looking good, we're all looking healthy and fit, and that's a big thing."
Henderson also believes Nemmer's work on nutrition has been equally important.
He added: "We all ate well anyway -- as professionals you need to make sure your diet is good. But since Mona come in, I think it has gone to another level -- the food we've been having is unbelievable.
"In preseason, I couldn't believe it -- we're getting a bit spoilt, actually. She's been world-class, making sure we're getting the right food in after games, the protein shakes we have... everything, everything is covered nutritionally.
"I've never seen anything like it since I've been involved in football in terms of the food we're having. Everything seems to be done and checked off for us to go out at the weekend and perform.
"She varies it, it changes all the time. The food is always different -- it's the way it's made, the way it's prepared for us. The variation is the biggest thing for us because having the same things all the time can get a bit boring and nutritionally it isn't good for you. It's good for you to try different things. I think she's introduced that brilliantly there.
"Nutrition is a massive part of football, it makes sure you're healthy, fit and feeling good, and that's definitely been a side we've improved massively on."