Matthew is fanatical about keeping fit. Sooty and Soo are keen to put him off a bit so Sooty tampers with his equipment. It doesn't work, despite ending up covered in pink paint, Matthew is still as fanatical as ever. Soo suggests he tries some aerobics. He is soon given a run for his money when his tutor Elaine completely tires him out. Meanwhile in the attic, Sweep is being fanatical about karate and judo, but Little Cousin Scampi soon catches him out.