Update exerciseDuration.vue

src/views/main/cloudDate/exerciseDuration.vue

@@ -350,7 +350,7 @@ export default {
         train1: "<=60分钟",
         train2: "60-120分钟",
         train3: "120-240分钟",
-        train3: ">240分钟",
+        train4: ">240分钟",
         avgTrainTime: "平均时长"
       };
       const values = this.tableList;