Curves in Signal Hill is looking for 50 volunteers to participate in a 21-day fitness study. The study consists of nine 30-minute required workout sessions with the first introductory study supervised by a trainer. The cost is a $20 fee that is refundable after the end of the study and all sessions completed. There is no age, weight or height requirement and all volunteers must register by Oct. 15. For more information, call (562) 997-1999.