Children at Oakfield Middle School in Irene Avenue, Lancing, will be treated to a visit by Olympic swimmer Karen Legg.
It's part of a fund-raising event organised by the Sports Council.
The swimmer will take all 410 pupils at the school through a series of activities including push-ups, sit-ups and star jumps on Tuesday.
Half of the money raised will go towards maintaining the school's pool and the other half will go towards developing the skills of promising young sportspeople.
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