Basal Metabolic Rate

Basal metabolic rate is computed using the Mifflin-St Jeor equation, which is expressed mathematically as a linear combination of height, weight, and age plus a bias conditioned on sex, scaled up by a factor that is a function of average weekly activity level.

Female: activity level * (10 * weight + 6.25 * height – 5 * age – 161)

Male: activity level * (10 * weight + 6.25 * height – 5 * age + 5)

Scale factors for activity level:

• Sedentary = 1.2
• Lightly active = 1.375
• Moderately active = 1.55
• Active = 1.725
• Very active = 1.9

Cycling Workout Energy Expenditure

Energy expended during a cycling workout can be computed by taking the average power, measured in watts, exerted during an activity and multiplying it by activity hours and again by a constant, 3.6.

Total Energy Expenditure

Total energy expenditure is computed by adding the basal metabolic rate and the cycling workout energy expenditure together.

Macronutrient Energy Distribution

Using the total energy expenditure as the total calories needed for the day, the macro Distribution is then computed using the following weight objective specific percentages.

• Weight loss: 40/40/20 (carbohydrates/protein/fats)
• Weight gain: 40/30/30
• Weight maintenance: 40/30/30