Overview

This project is a mobile application developed to assist users in maintaining and improving their fitness and nutritional habits. It provides tools to track physical activity and manage nutritional intake

Features

• Activity Monitoring: Track your daily physical activities including step counting by using the built-in sensor of the mobile device
• Nutritional Tracking: Log your meals and monitor your calorie and macronutrient intake
• Exercise Automation: Automated counting of exercise repetitions to help precise recording of each movement
• Personalized Plans: Create and manage custom fitness and nutrition plans tailored to your goals
• Notifications: Receive reminders and updates to keep you on track with your meals and your fitness goals

Technologies used

• Android Studio: For developing the Android application.
• Firebase: Backend services including authentication, notifications and database management
• ML Kit: Used for the pose detection, pre-trained model
• ZXing Library: For barcode scanning to log nutritional information from scanned food items
• Open Food Facts API: To fetch detailed nutritional information of a variaty foods from the entire world

Caloric requirement calculation (Mifflin-St. Jeor equation):

• for men: BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (years) + 5
• for women: BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (years) - 161
• Weight loss: TDEE = 0.8 x BMR
• Maintenance: TDEE = BMR
• Weight gain: TDEE = 1.2 x BMR

Macronutrients calculation:

• Protein: 0.8 g/kg for sedentary individuals; 1.2 g/kg for active individuals
• Fats: 25% of total caloric intake (TDEE)
• Carbohydrates: Remaining calories = TDEE - (protein calories + fat calories)

Calorie burn calculation during physical activity:

• Calories burned = 3.5 × MET × weight (kg) × time (minutes) / 200

Image processing:

• Capture frames: Using the device camera to capture the frames
• Detect positions: Using ML Kit to detect shoulder, elbow, and wrist positions

Calculation of the angle between the 3 landmarks (shoulder, elbow, wrist):

• Define vectors: Define shoulder-elbow and elbow-wrist vectors by calculating the coordinate differences

• dx1 = x1 - x2; dy1 = y1 - y2

• dx2 = x3 - x2; dy2 = y3 - y2

• dot product = (dx1 × dx2) + (dy1 × dy2)

• cos(θ) = (dot product) / (magnitude1 × magnitude2), where:magnitude = √(dx^2 + dy^2)

• θ = arccos(cos(θ))

• angle = θ × 180 / π

The calculated angle represents the angle between the shoulder-elbow segment and the elbow-wrist segment

A repetition is counted when the elbow angle is less than 50 degrees and the previous state was "down.

Screenshots

Navigation Graph Quiz

Fragments

HomeFragment	MealFragment	WorkoutFragment

FoodFragment	ExerciseFragment

FoodFragmentClick	ExerciseFragmentClick