diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2d28fef5067089beb235c45e4c3831cff66b6b01..e5afcfacc2c476c4a93c4680908e0fb1fefb42ec 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -13,7 +13,7 @@
         android:supportsRtl="true"
         android:largeHeap="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".SitupActivity`">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
diff --git a/app/src/main/java/com/example/leo/fitnessdiy/SitupActivity.java b/app/src/main/java/com/example/leo/fitnessdiy/SitupActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..f2c55050bdaced806e8df2b83252ff0e13579fcf
--- /dev/null
+++ b/app/src/main/java/com/example/leo/fitnessdiy/SitupActivity.java
@@ -0,0 +1,31 @@
+package com.example.leo.fitnessdiy;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+
+/**
+ * Created by Heil on 2/19/2018.
+ */
+
+public class SitupActivity extends AppCompatActivity{
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_situp);
+    }
+
+    public void openVideo(View view) {
+        String url = (String)view.getTag();
+
+        Intent intent = new Intent();
+        intent.setAction(Intent.ACTION_VIEW);
+        intent.addCategory(Intent.CATEGORY_BROWSABLE);
+
+        intent.setData(Uri.parse(url));
+        startActivity(intent);
+    }
+}
diff --git a/app/src/main/res/drawable/pushup_video1.png b/app/src/main/res/drawable/pushup_video_1.png
similarity index 100%
rename from app/src/main/res/drawable/pushup_video1.png
rename to app/src/main/res/drawable/pushup_video_1.png
diff --git a/app/src/main/res/drawable/pushup_video2.png b/app/src/main/res/drawable/pushup_video_2.png
similarity index 100%
rename from app/src/main/res/drawable/pushup_video2.png
rename to app/src/main/res/drawable/pushup_video_2.png
diff --git a/app/src/main/res/drawable/situp_video_1.png b/app/src/main/res/drawable/situp_video_1.png
new file mode 100644
index 0000000000000000000000000000000000000000..09dd0f57d2ee8808b76de822bd7ebebd5145e2df
Binary files /dev/null and b/app/src/main/res/drawable/situp_video_1.png differ
diff --git a/app/src/main/res/drawable/situp_video_2.png b/app/src/main/res/drawable/situp_video_2.png
new file mode 100644
index 0000000000000000000000000000000000000000..63075dafe854147faa9e46291dd9f30eabd916d2
Binary files /dev/null and b/app/src/main/res/drawable/situp_video_2.png differ
diff --git a/app/src/main/res/layout/activity_pushup.xml b/app/src/main/res/layout/activity_pushup.xml
index 174aad103fa2aa91563d3e0d2a765aa080f24197..fa868f51b942b0c7338e2dfb35632dccd2d48e42 100644
--- a/app/src/main/res/layout/activity_pushup.xml
+++ b/app/src/main/res/layout/activity_pushup.xml
@@ -52,7 +52,7 @@
         <ImageView
             android:layout_width="260dp"
             android:layout_height="158dp"
-            android:src="@drawable/pushup_video1" />
+            android:src="@drawable/pushup_video_1" />
 
         <TextView
             android:layout_width="wrap_content"
@@ -73,7 +73,7 @@
         <ImageView
             android:layout_width="258dp"
             android:layout_height="148dp"
-            android:src="@drawable/pushup_video2" />
+            android:src="@drawable/pushup_video_2" />
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/layout/activity_situp.xml b/app/src/main/res/layout/activity_situp.xml
new file mode 100644
index 0000000000000000000000000000000000000000..7abc8d0167113352287b610a44998bdab1e6eba4
--- /dev/null
+++ b/app/src/main/res/layout/activity_situp.xml
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context="com.example.leo.fitnessdiy.PushupActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="100dp"
+        android:text="@string/situp" />
+    <!--<Button-->
+        <!--android:layout_width="wrap_content"-->
+        <!--android:layout_height="wrap_content"-->
+        <!--android:layout_gravity="center_horizontal"-->
+        <!--android:layout_marginBottom="30dp"-->
+        <!--android:onClick="countDownPlank"-->
+        <!--android:text="start" />-->
+
+    <!--<TextView-->
+        <!--android:id="@+id/count_timer"-->
+        <!--android:layout_width="wrap_content"-->
+        <!--android:layout_height="wrap_content"-->
+        <!--android:layout_gravity="center_horizontal"-->
+        <!--android:textSize="32sp"-->
+        <!--android:text="2 : 00" />-->
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="30dp"
+        android:text="@string/situp_video" />
+
+
+
+    <!--<ScrollView-->
+    <!--android:layout_width="wrap_content"-->
+    <!--android:layout_height="wrap_content">-->
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="4dp"
+        android:clickable="true"
+        android:focusable="true"
+        android:onClick="openVideo"
+        android:orientation="horizontal"
+        android:tag="https://www.youtube.com/watch?v=IODxDxX7oi4">
+
+        <ImageView
+            android:layout_width="260dp"
+            android:layout_height="158dp"
+            android:src="@drawable/situp_video_1" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/situp_demo" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal"
+        android:tag="https://www.youtube.com/watch?v=lHjj5vmzpy0"
+        android:clickable="true"
+        android:focusable="true"
+        android:onClick="openVideo"
+        android:layout_margin="4dp">
+
+        <ImageView
+            android:layout_width="258dp"
+            android:layout_height="148dp"
+            android:src="@drawable/situp_video_2" />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/motivation_situp"/>
+    </LinearLayout>
+
+    <!--</ScrollView>-->
+
+
+</LinearLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a71b3740580515963df1478ba2fcdd0ec4ed7bde..fa66b1961ce6fd78ecf0fdfc4d734b403d088cf8 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -22,4 +22,8 @@
     <string name="motivation_pushup">Push Up Challenge : Before and After</string>
     <string name="pushup_demo">How to Push Up Properly</string>
     <string name="pushup_video">Push Up Video</string>
+    <string name="situp">Sit Up</string>
+    <string name="motivation_situp">Sit Up Challenge : Before and After</string>
+    <string name="situp_demo">How to do sit up properly</string>
+    <string name="situp_video">Sit Up Video</string>
 </resources>