Exploration of Gait Biomechanics and Muscle Pain of the Lower Extremity

This interventional study aims to test gait biomechanics in healthy individuals with and without experimental muscle pain in the lower extremities. The study aims to:

A) Examine how experimental muscle pain in different types of muscles (ankle plantar-flexion, knee extension, and flexion muscles) affects kinematics, kinetics, and muscle activation

Participants will receive six muscle injections: a) Hypertonic saline (painful condition) and b) Isotonic saline (control condition) in 1) m. gastrocnemius, 2) m. semitendinosus, and 3) m. biceps femoris.