diff --git a/.changeset/solid-pillows-laugh.md b/.changeset/solid-pillows-laugh.md
new file mode 100644
index 000000000..4623d91cd
--- /dev/null
+++ b/.changeset/solid-pillows-laugh.md
@@ -0,0 +1,5 @@
+---
+"@stackflow/react": minor
+---
+
+Improve scheduling of Activity preparation tasks by marking them as passive effects.
diff --git a/integrations/react/src/future/useActivityPreparation.ts b/integrations/react/src/future/useActivityPreparation.ts
index 53b4e4cc4..024b43c68 100644
--- a/integrations/react/src/future/useActivityPreparation.ts
+++ b/integrations/react/src/future/useActivityPreparation.ts
@@ -1,4 +1,5 @@
 import type { RegisteredActivityName } from "@stackflow/config";
+import { useEffect } from "react";
 import { usePrepare } from "./usePrepare";
 
 export function useActivityPreparation(
@@ -6,7 +7,9 @@ export function useActivityPreparation(
 ) {
   const prepare = usePrepare();
 
-  for (const { activityName } of activities) {
-    prepare(activityName);
-  }
+  useEffect(() => {
+    for (const { activityName } of activities) {
+      prepare(activityName);
+    }
+  }, [activities, prepare]);
 }
diff --git a/integrations/react/src/future/usePrepare.ts b/integrations/react/src/future/usePrepare.ts
index fb895069f..f83d4a0a7 100644
--- a/integrations/react/src/future/usePrepare.ts
+++ b/integrations/react/src/future/usePrepare.ts
@@ -2,6 +2,7 @@ import type {
   InferActivityParams,
   RegisteredActivityName,
 } from "@stackflow/config";
+import { useCallback } from "react";
 import { useActivityComponentMap } from "../__internal__/ActivityComponentMapProvider";
 import { isStructuredActivityComponent } from "../__internal__/StructuredActivityComponentType";
 import { useDataLoader } from "./loader";
@@ -17,37 +18,40 @@ export function usePrepare(): Prepare {
   const loadData = useDataLoader();
   const activityComponentMap = useActivityComponentMap();
 
-  return async function prepare<K extends RegisteredActivityName>(
-    activityName: K,
-    activityParams?: InferActivityParams<K>,
-  ) {
-    const activityConfig = config.activities.find(
-      ({ name }) => name === activityName,
-    );
-    const prefetchTasks: Promise<unknown>[] = [];
-
-    if (!activityConfig)
-      throw new Error(`Activity ${activityName} is not registered.`);
-
-    if (activityParams && activityConfig.loader) {
-      prefetchTasks.push(
-        Promise.resolve(loadData(activityName, activityParams)),
-      );
-    }
-
-    if ("_load" in activityComponentMap[activityName]) {
-      prefetchTasks.push(
-        Promise.resolve(activityComponentMap[activityName]._load?.()),
-      );
-    }
-
-    if (
-      isStructuredActivityComponent(activityComponentMap[activityName]) &&
-      typeof activityComponentMap[activityName].content === "function"
+  return useCallback(
+    async function prepare<K extends RegisteredActivityName>(
+      activityName: K,
+      activityParams?: InferActivityParams<K>,
     ) {
-      prefetchTasks.push(activityComponentMap[activityName].content());
-    }
-
-    await Promise.all(prefetchTasks);
-  };
+      const activityConfig = config.activities.find(
+        ({ name }) => name === activityName,
+      );
+      const prefetchTasks: Promise<unknown>[] = [];
+
+      if (!activityConfig)
+        throw new Error(`Activity ${activityName} is not registered.`);
+
+      if (activityParams && activityConfig.loader) {
+        prefetchTasks.push(
+          Promise.resolve(loadData(activityName, activityParams)),
+        );
+      }
+
+      if ("_load" in activityComponentMap[activityName]) {
+        prefetchTasks.push(
+          Promise.resolve(activityComponentMap[activityName]._load?.()),
+        );
+      }
+
+      if (
+        isStructuredActivityComponent(activityComponentMap[activityName]) &&
+        typeof activityComponentMap[activityName].content === "function"
+      ) {
+        prefetchTasks.push(activityComponentMap[activityName].content());
+      }
+
+      await Promise.all(prefetchTasks);
+    },
+    [config, loadData, activityComponentMap],
+  );
 }