Is Training Making You Slower?

<p>Your easy pace is slower than it was two months ago. Workouts feel harder. You&#39;re doing more volume than you&#39;ve ever done — so shouldn&#39;t you be getting faster?</p><p>A listener wrote in with exactly that question, and it turned into a full episode. Coach TJ and Zoë unpack why feeling slower in a big block is usually the block working, not the block failing — and how to tell the difference when it isn&#39;t.</p><p>The core idea: fitness and performance are not the same thing. Fitness is the physiological capacity you&#39;ve built. Performance is how much of it you can access on a given day. Every training stimulus produces both a fitness response (slow, cumulative, quiet) and a fatigue response (fast, temporary, extremely loud). Fatigue is louder than fitness — you don&#39;t wake up feeling your mitochondrial density, but you absolutely feel Tuesday&#39;s workout on top of Sunday&#39;s long run.</p><p><br></p><p>IN THIS EPISODE</p><p>- Why aerobic base and durability are the two slowest adaptations in endurance sport — and why that means you can&#39;t train for just one race</p><p>- The real sources of training fatigue: glycogen depletion, peripheral muscle fatigue, neuromuscular fatigue, connective tissue loading, and central/autonomic nervous system stress</p><p>- Why comparing today&#39;s run to the same route two years ago on Strava is apples to oranges</p><p>- Goodhart&#39;s Law in training: the moment easy pace becomes the metric you optimize, it stops being a useful proxy for fitness</p><p>- Progress signals that actually mean something: same pace at lower RPE, same RPE over more vert, better output late in long runs, tolerating back-to-back long runs, and — the most underrated one — recovering faster from the same load</p><p>- Can training make you less fit? The honest answer, plus why &quot;worse at a 5K while training for a 100&quot; isn&#39;t the same as losing fitness</p><p>- Normal acute fatigue vs. functional overreaching vs. non-functional overreaching vs. actual overtraining syndrome — and why most athletes who think they&#39;re overtrained are under-recovered</p><p>- The red-flag list: elevated easy RPE for days-to-weeks, repeated failure at previously manageable workouts, recovery that doesn&#39;t produce a rebound, sleep disruption, mood and motivation changes, recurrent illness, injury creep, menstrual cycle disruption</p><p>- What TJ&#39;s biggest-ever build actually looked like: 15-hour weeks, multiple 100-mile weeks, four (sometimes five) long runs a week, and running slower than he ever has</p><p><br></p><p>ALSO IN THIS EPISODE — HOT OR NOT</p><p><br></p><p>- The Leadville 100: no qualifiers to enter, aggressive early cutoffs, and where the competitive incentives are drifting</p><p>- Changing shoes mid-race (a caveated yes)</p><p>- Sitting down at aid stations (a hard no, and the physiology behind it)</p><p>- Listening to podcasts while racing (one yes, one very firm no)</p><p><br></p><p>BETTER QUESTIONS THAN &quot;AM I GETTING FASTER?&quot;</p><p>Am I tolerating more training? Am I recovering from it? Am I generally healthy and adequately fueled? Does performance return when fatigue comes down?</p><p><br></p><p>Don&#39;t confuse a temporary inability to express fitness with the absence of it.</p><p><br></p><p>- Zoë&#39;s UltraSignup article on Goodhart&#39;s Law: https://trailhead.ultrasignup.com/science-outdoors/data-for-runners/</p><p><br></p><p>GET IN TOUCH</p><p>Questions for a future episode: microcosmcoaching@gmail.com</p><p>Coaching and community: https://microcosm-coaching.com</p>