Words of inspiration were offered to youngsters as part of the Sports For Schools programme.
Commonwealth Games athlete Meghan Beesley, who specialises in the 400m hurdles, visited Farndon St Peter’s Cross Keys Academy.
She put children from foundation to year six through their paces with a range of warm-up routines.
The pupils completed circuits that included press-ups, star jumps and leg drives.
Meghan, 27, spoke about her experiences as an athlete and her comeback from serious injury.
Miss Donna Cobb, the school’s deputy head, said: “She talked about the importance of never giving up.
“She has had a lot of setbacks in her career but said that you should always keep practising and persevering.”
Lovers’ Lane Primary School, Newark, welcomed swimmer Amy Smith who helped Great Britain to fifth place in the 4x100m freestyle relay at the 2012 London Olympics.
Mrs Kate Lambert, sports coach at the school, said: “The children learnt about Amy’s career before she arrived.
“It was good for them to see someone showing what can be achieved.”
Children at the schools were sponsored to complete fitness circuits to raise money for PE equipment and support GB athletes.