In Week 3 of our Stress Month series, we explore how stress weighs down the body’s physical frame—your skeleton and muscles. Stress doesn’t just make you feel mentally drained; it tightens muscles, slows recovery, and even weakens bones over time. We break down how stress-induced muscle tension can lead to injuries for runners and headaches for non-runners alike, why inflammation keeps your body sore and achy, and how elevated cortisol erodes bone density—raising the risk of stress fractures and joint pain. We also talk about fatigue and sluggish movement, where stress makes stairs feel like hill repeats. To round it out, we share real-world strategies: mobility work, active recovery, nutrition, and the importance of rest. Whether you’re logging miles or just trying to get through the workweek, this episode shows how stress literally makes you feel heavy.