Brent and Kilburn TimesFive-hour fitness frenzy raises thousands for dementia sufferers ...Brent and Kilburn TimesFitness fanatics worked out for 5 hours to raise funds for Dementia UK. Archant. A fitness instructor from Willesden was joined by keep-fit enthusiasts this weekend for a five-hour 'Fit Frenzy' session that raised thousands of pounds in memory of her ...