The Spaniard also explained his decision to ban sugary fruit juices from the club's training ground after he took over from Arsene Wenger this summer.
Arsenal have conceded six league goals already this season, with many pundits attributing this defensive frailty to Emery's high-pressing philosophy and insistence on playing out from the back.
If Emery can do successfully do that, his task of securing a top-four finish and a Champions League place will become an terrible lot easier.
In another behind-the-scenes tweak, Cross reports that the Basque boss has installed a marquee next to training pitches so players can get quick access to gym equipment.
Emery's side displayed an outstanding performance during the clash against the Hammers, with Alexandre Lacazette impressing during a second-half cameo appearance.
"Our demands are very great but I ask every player every day to give us more". But with a lot of sugar? The Bluebirds had to allow their wonderkid to spread his wings and fly in the Premier League, but most Cardiff fans still adore him.
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"He's training normally with the group, in every session this week", Emery said at the Arsenal news conference on Friday.
"When you play three matches in a week, it's hard. That includes against Bournemouth - and I think in every game, we could have got something", he told the press.
Former Paris St Germain coach Emery believes he has identified where Arsenal need to improve in order to correct their poor away form, calling on his players to keep hold of possession rather than try to force the issue. "They prefer their orange juice fresh".
Aaron Ramsey says he is "excited and optimistic" for the future at Arsenal under Unai Emery.
Emery confirmed Reiss Nelson is set to join German side Hoffenheim on loan for the remainder of the season, although he has also signed a new long-term Arsenal deal.