The Toe Touch The Back Scratch The Butterfly Stretch is one of the 3 best exercises to improve your flexibility. These exercises are part of the 30-day challenge “Flexibility for the Inflexible” by Nerd Fitness Prime. The exercises include the Toe touch the back, Scratch the Butterfly Stretch, and Stretch the legs. The challenge is part of our 30-Day Flexibility Challenge, which includes working out with a Nerd Fitness Coach. We’ll show you how to become more flexible in 30 days. We also show you the 3 exercises to help you improve general mobility.