diff --git a/.gitignore b/.gitignore
index 496ee2c..0a1b6af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,8 @@
-.DS_Store
\ No newline at end of file
+.DS_Store
+/.idea/.gitignore
+/.idea/dictionaries/lucawarm.xml
+/.idea/material_theme_project_new.xml
+/docs/documentation/assets/math-expression-location-calculation.png
+/.idea/modules.xml
+/.idea/muupooviixee66.iml
+/.idea/vcs.xml
diff --git a/code/src/Fitbot/.gitignore b/code/src/Fitbot/.gitignore
index aa724b7..732c947 100644
--- a/code/src/Fitbot/.gitignore
+++ b/code/src/Fitbot/.gitignore
@@ -13,3 +13,5 @@
 .externalNativeBuild
 .cxx
 local.properties
+.idea
+.vscode
\ No newline at end of file
diff --git a/code/src/Fitbot/app/src/main/AndroidManifest.xml b/code/src/Fitbot/app/src/main/AndroidManifest.xml
index 6aa2fae..d41d0f1 100644
--- a/code/src/Fitbot/app/src/main/AndroidManifest.xml
+++ b/code/src/Fitbot/app/src/main/AndroidManifest.xml
@@ -15,12 +15,14 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Fitbot" >
-        <!--android:name=".ui.activities.MainActivity"-->
         <activity
             android:name=".EndScreenActivity"
             android:exported="false" />
         <activity
             android:name=".ui.activities.FitnessActivity"
+            android:exported="true" />
+        <activity
+            android:name=".ui.activities.MainActivity"
             android:exported="true" >
 
             <intent-filter>
diff --git a/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/activities/MainActivity.java b/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/activities/MainActivity.java
index 949e2b0..82c916d 100644
--- a/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/activities/MainActivity.java
+++ b/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/activities/MainActivity.java
@@ -1,6 +1,7 @@
 package com.example.fitbot.ui.activities;
 
 import android.annotation.SuppressLint;
+import android.content.Intent;
 import android.os.Bundle;
 import android.support.design.widget.NavigationView;
 import android.support.v4.view.GravityCompat;
@@ -8,6 +9,8 @@ import android.support.v4.widget.DrawerLayout;
 import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
+import android.util.Log;
+import android.widget.Button;
 
 import com.example.fitbot.R;
 
@@ -17,17 +20,26 @@ public class MainActivity extends AppCompatActivity {
     DrawerLayout drawerLayout;
     NavigationView navigationView;
     Toolbar toolbar;
+    Button startButton;
 
     @SuppressLint("WrongViewCast")
     @Override
     protected void onCreate (Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
+        setContentView(R.layout.activity_main );
 
         /*---Hooks---*/
         drawerLayout = findViewById(R.id.drawer_layout);
         navigationView = findViewById(R.id.nav_view);
         toolbar = findViewById(R.id.toolbar);
+        startButton = findViewById(R.id.startButton);
+
+        startButton.setOnClickListener(v -> {
+            // Switch to fitness activity
+            Log.i("MainActivity", "Switching to FitnessActivity");
+            Intent intent = new Intent(MainActivity.this, FitnessActivity.class);
+            startActivity(intent);
+        });
 
         /*---Tool Bar---*/
 //      setSupportActionBar(toolbar);
diff --git a/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/components/PersonalMotionPreviewElement.java b/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/components/PersonalMotionPreviewElement.java
index 32631ee..ef111ad 100644
--- a/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/components/PersonalMotionPreviewElement.java
+++ b/code/src/Fitbot/app/src/main/java/com/example/fitbot/ui/components/PersonalMotionPreviewElement.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
+import android.util.Log;
 import android.view.View;
 
 import com.example.fitbot.util.path.GesturePath;
@@ -24,6 +25,8 @@ public class PersonalMotionPreviewElement extends View {
     private Path referencePath, performingPath;
     private Paint referencePaint, performingPaint;
 
+    private Paint backgroundColor = new Paint();
+
     /**
      * Constants for the preview path projection.
      */
@@ -42,6 +45,9 @@ public class PersonalMotionPreviewElement extends View {
      */
     public PersonalMotionPreviewElement(Context context, GesturePath path) {
         super(context);
+        Log.i("PersonalMotionPreviewElement", "Creating new PersonalMotionPreviewElement.");
+        this.backgroundColor = new Paint();
+        this.backgroundColor.setColor(0xFF000000); // Black
         this.path = path;
         this.motionProcessor = new MotionProcessor();
         this.motionProcessor.startListening();
@@ -158,6 +164,7 @@ public class PersonalMotionPreviewElement extends View {
 
     @Override
     public void onDraw(Canvas canvas) {
+        canvas.drawRect(0, 0, getWidth(), getHeight(), backgroundColor);
         // Draw the sport preview canvas
         canvas.drawPath(referencePath, referencePaint);
         canvas.drawPath(performingPath, performingPaint);
diff --git a/code/src/Fitbot/app/src/main/res/layout/activity_fitness.xml b/code/src/Fitbot/app/src/main/res/layout/activity_fitness.xml
index 35990c8..38aa5c9 100644
--- a/code/src/Fitbot/app/src/main/res/layout/activity_fitness.xml
+++ b/code/src/Fitbot/app/src/main/res/layout/activity_fitness.xml
@@ -1,10 +1,25 @@
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
+android:layout_width="match_parent"
+android:layout_height="match_parent"
+android:background="#232323"
+android:fitsSystemWindows="true"
+tools:context=".ui.activities.FitnessActivity"
+tools:openDrawer="start">
+
+<LinearLayout
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
     <com.example.fitbot.ui.components.PersonalMotionPreviewElement
+        android:id="@+id/personalMotionPreviewElement"
+        android:visibility="visible"
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>
 
-</android.support.constraint.ConstraintLayout>
\ No newline at end of file
+</LinearLayout>
+
+</android.support.v4.widget.DrawerLayout>
\ No newline at end of file
diff --git a/code/src/Fitbot/app/src/test/java/com/example/fitbot/PathSegmentTest.java b/code/src/Fitbot/app/src/test/java/com/example/fitbot/PathSegmentTest.java
index a7d7bca..0ab0f1d 100644
--- a/code/src/Fitbot/app/src/test/java/com/example/fitbot/PathSegmentTest.java
+++ b/code/src/Fitbot/app/src/test/java/com/example/fitbot/PathSegmentTest.java
@@ -1,9 +1,12 @@
 package com.example.fitbot;
 
+import static org.junit.Assert.assertEquals;
+
 import com.example.fitbot.util.path.GesturePath;
 import com.example.fitbot.util.path.PathSegment;
 
 import org.joml.Vector3f;
+import org.junit.Test;
 
 public class PathSegmentTest {
 
@@ -23,7 +26,6 @@ public class PathSegmentTest {
 
 
     @Test
-    @DisplayName("Test Path Segment Interpolation")
     public void test_pathSegmentInterpolation() {
         Vector3f start = new Vector3f(0, 0, 0);
         Vector3f end = new Vector3f(1, 1, 1);