Yeah, maybe your N=1 causation hypothesis isn&#x27;t all that well reasoned.<p>This concept is absolutely false.  With a proper setup, you should be able to ride all you want without anything &quot;wearing out&quot;.  Bodies don&#x27;t &quot;wear out&quot;, in fact they respond well when stress is applied correctly. It gets harder as you age, but that&#x27;s an orthogonal issue.  Injury and recovery is part of being active.<p>I&#x27;ve done 10 Ironmans and seen many, many people in their 40s, 50s, 60s happily cranking out miles and ending up looking younger than when they started. What wears bodies out is not using them.