29/05/2026
Running isn’t just “cardio.”
Every stride puts massive force through your muscles — far more than most people realize.
Here’s what your body handles while running at a steady pace:
* Calves (soleus): up to 6–8× bodyweight
* Quadriceps: around 4–6× bodyweight
* Hamstrings: roughly 2–9× bodyweight
* Glutes: about 1.5–3× bodyweight
* Ground reaction force per step: typically 2–3× bodyweight
For a 75 kg runner, that can mean the calf muscles briefly handling over 500 kg of force during a single stride.
That’s why strength training matters for runners.
Your muscles aren’t just moving you forward — they’re absorbing impact, stabilizing joints, and recycling energy thousands of times per run.
