Updated README

src/main/java/diagram.puml

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+@startuml
+
+Class FitnessApp{
++ startApp(): void
+}
+
+Class Person{
+- name: String
+- email: String
+- workouts: ArrayList<Workout>
+
++ getName(): String
++ setName(name: String): void
+
++ getEmail(): String
++ setEmail(email: String): void
+
++ getWorkouts(): ArrayList<Workout>
++ setWorkouts(workouts: ArrayList<Workout>): void
+}
+
+Class Workout{
+- duration: String
+- date: Date
+- completed: boolean
+- exercise: ArrayList<Exercise>
+
++ getDuration(): String
++ setDuration(duration: String): void
+
++ getDate(): Date
++ setDate(date: Date): void
+
++ getCompleted(): boolean
++ setCompleted(completed: boolean): void
+
++ getExercise(): ArrayList<Exercise>
++ setExercise(exercise: ArrayList<Exercise>): void
+
++ displayWorkoutInfo(): void
+}
+
+Class Exercise{
+- type: WorkoutType
+- name: String
+- caloriesBurned: double
+
++ getType(): WorkoutType
++ setType(type: WorkoutType): void
+
++ getCaloriesBurned(): double
++ setCaloriesBurned(caloriesBurned: double): void
+}
+
+enum WorkoutType{
+CHEST
+BACK
+SHOULDER
+ARMS
+CARDIO
+LEGS
+}
+
+' Relationships
+FitnessApp "1" --> "*" Person : manages users
+' One fitness app can contain multiple people
+
+Person "1" --> "*" Workout : performs
+' A person can complete many workouts
+
+Workout "1" --> "*" Exercise : contains
+' A workout is made up of multiple exercises
+
+Exercise --> WorkoutType : categorized by
+' Each exercise belongs to one workout type
+
+@enduml

src/main/java/org/codedifferently/Exercise.java

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+package org.codedifferently;
+
+// Class that represents a single exercise
+public class Exercise {
+
+    // The type of exercise (ex: cardio, strength, etc.)
+    private ExerciseType type;
+
+    // Name of the exercise (ex: Pushups, Running)
+    private String name;
+
+    // Number of calories burned during the exercise
+    private int caloriesBurned;
+
+    // Constructor used to create a new Exercise object
+    public Exercise(ExerciseType type, String name, int caloriesBurned) {
+        this.type = type;               // set exercise type
+        this.name = name;               // set exercise name
+        this.caloriesBurned = caloriesBurned; // set calories burned
+    }
+
+    // Returns the exercise type
+    public ExerciseType getType() {
+        return type;
+    }
+
+    // Updates the exercise type
+    public void setType(ExerciseType type) {
+        this.type = type;
+    }
+
+    // Returns the name of the exercise
+    public String getName() {
+        return name;
+    }
+
+    // Updates the name of the exercise
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    // Returns the number of calories burned
+    public int getCaloriesBurned() {
+        return caloriesBurned;
+    }
+
+    // Updates the number of calories burned
+    public void setCaloriesBurned(int caloriesBurned) {
+        this.caloriesBurned = caloriesBurned;
+    }
+
+    // Displays the exercise information to the console
+    public void displayExerciseInfo() {
+        System.out.println("--------------------");
+        System.out.println("Exercise Information");
+        System.out.println("Name: " + name);                 // print exercise name
+        System.out.println("Type: " + type);                 // print exercise type
+        System.out.println("Calories Burned: " + caloriesBurned); // print calories burned
+        System.out.println();
+    }
+}

src/main/java/org/codedifferently/ExerciseType.java

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+package org.codedifferently;
+
+// Enum representing the different categories of exercises a workout can include
+public enum ExerciseType {
+
+    // Exercises that target chest muscles
+    CHEST,
+
+    // Exercises that target back muscles
+    BACK,
+
+    // Exercises that target shoulder muscles
+    SHOULDERS,
+
+    // Exercises that target arm muscles
+    ARMS,
+
+    // Exercises focused on cardiovascular endurance
+    CARDIO,
+
+    // Exercises that target leg muscles
+    LEGS
+}