4. Sex is one factor that can affect optimum weight - Edexcel - GCSE Physical Education - Question 4 - 2020 - Paper 1

Professional jockeys typically require a lower optimum weight to maintain speed and agility while riding, as excess weight can hinder performance. In contrast, professional rugby players benefit from a higher optimum weight to enhance strength and power, which are crucial for tackling and scrummaging in the sport. Therefore, the physical demands and roles in their respective sports dictate their optimum weights.