<i>&quot;What is true is that you can injure joints by increasing the workload too fast. Joints can strengthen and adapt to increased loads but it happens slowly. So don&#x27;t go from running 5 miles per outing to running 10 miles.&quot;</i><p>Underrated point. This is especially noticeable carrying packs. If you don&#x27;t train to improve your joint strength (tendons and surrounding tissue, not muscle) you will injure yourself. Slowly you can build up to heavier weights. I now regularly train with 10kg, occasionally 15kg and alternate with 1kg. 2000km this year.