diff --git a/client/pages/Feed.tsx b/client/pages/Feed.tsx
index 887f6b3c..20c78b53 100644
--- a/client/pages/Feed.tsx
+++ b/client/pages/Feed.tsx
@@ -176,6 +176,13 @@ export default function Feed() {
     }
   }, [mapPostsToFeedItems, toast, user?.id]);
 
+  useEffect(() => {
+    // Initialize with all arms if none selected
+    if (selectedArms.length === 0) {
+      setSelectedArms(ARMS.map((a) => a.id));
+    }
+  }, []);
+
   useEffect(() => {
     fetchFeed();