The West Ham players were left well and truly in a spin after they were put through their paces at the David Lloyd Club in Gidea Park.
The majority of the Development Squad including Josh Cullen and Djair Parfitt-Williams were challenged to an intense 30 minute work-out testing the players strength and endurance.
For the first time, the players were grouped together as they raced to music and thoroughly enjoyed the experience.
The players then cooled off in the pool, but the hard work continued as they did a recovery session to build up their fitness ahead of the new season.
West Ham TV got behind the scenes with the talented youngsters as they stepped up their pre-season preparations and had some fun along the way!