“…14,19 Myoton allows easy and rapid measurements of the mechanical properties of muscles, including stiffness, frequency, and decrement in varying positions. 20 The stiffness measured by Myoton is the resistance against external forces that distort the muscle shape; it is measured as the force per unit length, in which increasing values indicate increasing levels of stiffness. 21 In Kang and Lee, 30 healthy athletes performed IASTM or active calf stretching on the gastrocnemius muscle, and when the stiffness was compared between the two groups, the IASTM group showed a greater reduction than the active calf stretching group.…”