The 100 Calorie Hybrid Workout Explained

The 100 calorie hybrid workout introduces a skill many athletes struggle with: managing output across different machines while already under fatigue.

Your task is to accumulate 100 total calories, split across two or more cardio machines. You decide how the calories are divided. You decide when to rest. The focus is not on speed, but on pacing and control.

This challenge builds directly on the aerobic foundation of Challenge #1 and adds complexity without chaos. It also sets the stage for more race-style efforts later in the RB100 series.


Why Calories Change the Game

Calories are deceptive. They feel objective, but they hide important differences:

  • Different machines tax the body differently
  • Output spikes carry a recovery cost
  • Poor pacing compounds fatigue quickly

Athletes often attack the first machine too aggressively, only to fade badly on the second. This challenge teaches restraint, awareness, and consistency.

In hybrid fitness formats such as HYROX, this exact mistake shows up repeatedly. Learning to manage calories early prevents it later.


Choosing Your Machines

You may use any combination of machines that display calories.

Common Options

  • Row ergometer
  • SkiErg
  • Air bike
  • Stationary bike
  • Treadmill using calorie display

Choose machines you can control rather than ones you feel forced to survive.

Athlete rowing at moderate pace, relaxed shoulders, consistent stroke rhythm. PM monitor visible showing steady calorie accumulation
Athlete rowing at moderate pace, relaxed shoulders, consistent stroke rhythm. PM monitor visible showing steady calorie accumulation

How to Split the 100 Calories

There is no required split, but intention matters.

Beginner Example

  • 100 calories on a single machine
  • Breaks as needed

Intermediate Example

  • 50 calories row
  • 50 calories bike

Advanced Example

  • 40 calories row
  • 30 calories SkiErg
  • 30 calories bike

The more machines you add, the more important transitions become.


Pacing Guidelines

A useful rule of thumb:

  • You should feel slightly under control at the halfway point
  • Breathing should remain rhythmic
  • Output should stay consistent across machines

If your power drops sharply after the first transition, the opening pace was too aggressive.


Common Mistakes to Avoid

  • Treating the workout as a sprint
  • Ignoring transitions between machines
  • Chasing calorie numbers instead of effort
  • Comparing output to others

This challenge rewards discipline over bravado.


How This Supports Hybrid Fitness Training

The 100 calorie hybrid workout develops:

  • Machine efficiency
  • Energy management under fatigue
  • Transition awareness
  • Confidence moving between modalities

These skills translate directly to longer workouts, race simulations, and competition environments where wasted energy compounds quickly.

At RB100.Fitness, we prioritise training that carries forward. Data does not lie. Athletes who pace well finish strong.


Progressions and Scaling Options

Beginner

  • Single machine only
  • Lower calorie target if needed

Intermediate

  • Two machines
  • Short controlled rests

Advanced

  • Three or more machines
  • Minimal rest
  • Smooth transitions

Scale difficulty through structure, not suffering.


Frequently Asked Questions

Can I repeat the same machine twice?

Yes, but transitions are encouraged for learning.

Is this meant to be maximal effort?

No. Consistency matters more than peak output.

How often should I retest this challenge?

Every 6 to 8 weeks is appropriate.

Editorial Team

The Relentless Bravery Editorial Team brings together athletes, coaches, and experts to share trusted insights on training, recovery, and mindset. Always consult a professional before making fitness or health changes.

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