Aerobic:
- Resting Heart Rate (RHR)
- Elevated Heart Rate (EHR)
- Recovery Time (Elevated to Resting)
- VO2 (Oxygenation during exercise)
- Pace / Speed (distance per time)
- Total Time per session
- Exercise Type
- Trends through
  - Pace / Speed over Time (weekly, monthly, etc)
  - Weekly Duration (total time in aerobic exercise per week)
  - Exercise Difficulty Rating (EDR) - Subjective 1 - 10 scale
  - Resting Heart Rate over time
  - Recovery Time over time

Weight trainng:
- Exercise Type
- Max Day / Regular Training
- Weight used
- Sets done
- Repetitions completed
- Half Repetitions completed
- To failure (true/false)
- Trends through
  - Weight per exercise type over time
  - Sets done per weight level per exercise type over time
  - Reps done per set per weight level per exercise type over time
  - Body part measurements (inches / centimeters)
  - Max Lift on Max Days
  - Max Lift Reps

Meal Tracking
- Meal Name
- Dishes included in Meal
- Approximate portion size
- Approximate calories
- Approxmiate portein in grams
- Approximate fat content in grams / calories
- Trends through
  - Personal Goal (more calories or less?)
  - Number of meals per day
  - Calorie count
  - Protein gram count
  - Fat gram / calorie count

routine {
    _id: routineId,
    name: routine_name,
    type: routine_type,
    addedBy: user,
    addedDate: yyyy-mm-dd,
    addedTime: hh:mm:ss,
}

exercises {
    _id: exerciseId,
    routineId: routineId,
    exName: exercise_name,
    exercise_type: exercise_type,
}

logEntry {
    _id: logId,
    routineId: routineId,
    exerciseId: exerciseId,
    "date": "2023-03-01",
    "exercises": [
        {
            "name": "Bench Press",
            "weight": 120,
            "sets": [
                {
                    "reps": 8,
                    "went_to_failure": true
                },
                {
                    "reps": 10,
                    "went_to_failure": false
                }
            ],
            "sets_performed": 2
        }
    ]
}