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When shin splints develop, most runners instinctively look outward for a fix, new shoes, compression sleeves, softer terrain. These things can help, but recovery almost always starts somewhere more fundamental: understanding how the muscles in your lower leg are actually working. Shin splints is the common term for what clinicians call Medial Tibial Stress Syndrome (MTSS), and the mechanics behind it are worth understanding properly. The three types of muscle contraction Your muscles produce force in three ways: concentric, eccentric, and isometric contractions. You don't need to memorise the terminology, but grasping what each one does can make a real...