Because most people don&#x27;t use tracking apps and because improvements are less obvious.<p>It&#x27;s very easy to measure progress when you&#x27;re lifting. You&#x27;re putting more on, the numbers are going up. Lifting more weight leads to being able to lift more weight. The path from &quot;lift less&quot; to &quot;lift more&quot; is obvious, easy to measure, and feels a bit like building an MMORPG character.<p>For running the gains are a lot slower and less correlated to your training. Running 2 minutes faster today than three months ago also doesn&#x27;t feel as significant as squatting 50kg more than three months ago does.