CORE, FLEX AND STRETCH CORE, FLEX AND STRETCH Classesat The Fitness Bank, South Wigston We don't have any of these classes running this week. Check our current timetable to see if we're running any similar classes at the moment. Full Class Timetable >> About CORE, FLEX AND STRETCH CORE, FLEX AND STRETCH - Our quick guide to what it is, how it works, and what to expect during a class! Core, Flex and Stretch is a workout which uses resistance bands to improve your flexibility and increase your strength. A full body workout with a difference.