diff --git a/bincio/extract/ingest.py b/bincio/extract/ingest.py
index 7515251..dedb4fc 100644
--- a/bincio/extract/ingest.py
+++ b/bincio/extract/ingest.py
@@ -59,6 +59,20 @@ def ingest_parsed(
     summaries[activity_id] = summary
     write_index(list(summaries.values()), data_dir, owner)
 
+    # Rebuild athlete.json with updated MMP curves and records.
+    # Preserve any manually-set fields (max_hr, ftp_w, zones, etc.) from the existing file.
+    from bincio.extract.writer import write_athlete_json
+    _COMPUTED = {"bas_version", "generated_at", "power_curve", "records", "best_climbs"}
+    athlete_config: dict[str, Any] = {}
+    athlete_path = data_dir / "athlete.json"
+    if athlete_path.exists():
+        try:
+            existing = json.loads(athlete_path.read_text(encoding="utf-8"))
+            athlete_config = {k: v for k, v in existing.items() if k not in _COMPUTED}
+        except Exception:
+            pass
+    write_athlete_json(list(summaries.values()), data_dir, athlete_config)
+
     return activity_id
 
 
diff --git a/site/src/components/AthleteView.svelte b/site/src/components/AthleteView.svelte
index 3de95cd..ed990f1 100644
--- a/site/src/components/AthleteView.svelte
+++ b/site/src/components/AthleteView.svelte
@@ -130,7 +130,7 @@
         <MmpChart {athlete} {activities} />
       </div>
     {:else}
-      <p class="text-zinc-500 text-sm">No power data found. Make sure your activities include power meter data and re-run <code class="text-zinc-300">bincio extract</code>.</p>
+      <p class="text-zinc-500 text-sm">No power data found. Make sure your activities include power meter data.</p>
     {/if}
 
   <!-- Records tab -->
diff --git a/site/src/pages/athlete/index.astro b/site/src/pages/athlete/index.astro
index 58865d5..3f56408 100644
--- a/site/src/pages/athlete/index.astro
+++ b/site/src/pages/athlete/index.astro
@@ -13,5 +13,5 @@ const handle = shards[0]?.handle ?? null;
     window.location.replace(base + 'u/' + handle + '/athlete/');
   </script>
 ) : (
-  <p>No data found. Run <code>bincio extract</code> first.</p>
+  <p>No data found. Upload activities to get started.</p>
 )}
diff --git a/site/src/pages/stats/index.astro b/site/src/pages/stats/index.astro
index b2ceda2..65bcf96 100644
--- a/site/src/pages/stats/index.astro
+++ b/site/src/pages/stats/index.astro
@@ -14,5 +14,5 @@ const handle = shards[0]?.handle ?? null;
     window.location.replace(base + 'u/' + handle + '/stats/');
   </script>
 ) : (
-  <p>No data found. Run <code>bincio extract</code> first.</p>
+  <p>No data found. Upload activities to get started.</p>
 )}