Swim, Bike, and Run Models

We now use distance, pace, power, and body mass to refine energy predictions—so your carb recommendations match the true demands of each session.

What are Swim, Bike, and Run Models?

Hexis has upgraded its energy prediction models to provide more accurate and personalised fuelling recommendations. Our enhanced models now integrate advanced performance metrics specific to your sport, moving beyond basic intensity ratings to incorporate objective, quantifiable data.

How do Enhanced Predictions Work by Sport?

Running & Swimming: Distance + Pace Integration

For running and swimming activities, your energy predictions now factor in:

  • Actual distance covered during your workout
  • Average pace throughout the session

These metrics provide a more precise calculation of your energy expenditure compared to subjective intensity alone.

Cycling: Power Output Integration

For cyclists, we've integrated average power output data to deliver more accurate energy predictions. Power meters provide objective data.

Why are Enhanced Predictions Important?

Individual Variation

The perception of workout intensity can vary considerably from person to person, as every athlete has unique physiological characteristics and training backgrounds. What feels "hard" to one athlete may feel "moderate" to another.

Objective Data Advantage

To provide the most accurate fuelling recommendations possible, our enhanced models now prioritise quantifiable parameters including:

  • Body mass - Your individual metabolic requirements
  • Distance - Actual work performed
  • Pace - Intensity and efficiency metrics
  • Power output (cycling) - Direct measurement of energy output

Comprehensive Approach

While objective metrics like distance, pace, and power significantly improve our energy expenditure estimates, intensity ratings remain important for determining optimal carbohydrate distribution throughout your day. The combination of both objective and subjective data creates the most comprehensive fuelling strategy.

How to Ensure Accurate Predictions

To get the most from your enhanced energy predictions:

  1. Sync your training data regularly from your preferred platform (TrainingPeaks, Apple Health, Intervals.icu)
  2. Ensure accurate workout details including distance, pace, and power data where available
  3. Keep your profile updated with current body mass and training information
  4. Use intensity ratings to help fine-tune carbohydrate timing recommendations

The enhanced energy prediction models work automatically in the background - simply continue logging your workouts as normal and enjoy more accurate, personalised fuelling recommendations.

Updated on: 
August 14, 2025