posted 16th February 2026
Unlock "free speed" with our guide to Pillar 4: Speed Efficiency. Learn how to improve your running economy, optimise your biomechanics, and move faster with less effort.
We’ve built a massive engine (Aerobic Durability), raised your cruising speed (Lactate Threshold), and mastered the pilot's manual (Race Execution). Now, we focus on the final piece of the performance puzzle: Speed Efficiency.
In the world of endurance, efficiency (often called Running Economy or Cycling Economy) is the holy grail. It is the ratio of work performed to energy expended.
Think of it this way: If two athletes are running side-by-side at a 7:00/mile pace, but Athlete A is using 10% less oxygen than Athlete B, Athlete A is going to win every single time. They are simply wasting less fuel. Efficiency is how you get faster without actually working harder.
The "Spring" Mechanism: Improving Your Economy
Endurance movement isn't just about muscle—it’s about tendons. Your legs act like springs. Every time your foot hits the ground, your tendons store energy and "pop" it back out.
An efficient athlete has "stiff" springs. An inefficient athlete has "soft" springs that leak energy like a flat tire. To improve your economy, we focus on three specific areas:
Neuromuscular Coordination
This is the communication between your brain and your muscles. Speed work isn't just about your heart and lungs; it’s about teaching your brain to fire the right muscles at the right micro-second.
- The Benefit: You stop "fighting" your own body. Your movements become fluid, rhythmic, and automatic.
Biomechanics and Form
Small "energy leaks" add up over thousands of repetitions.
- Over-striding: Landing with your foot too far in front of your body acts like a brake.
- Vertical Oscillation: Bouncing too high in the air wastes energy moving up and down instead of forward.
- Arm Swing: Crossing your arms over your midline creates rotational drag that your core has to fight.
Structural Power (Strength Training)
You cannot be efficient if you are weak. Heavy strength training and plyometrics (jumping drills) increase the "stiffness" of your tendons. This allows you to reclaim "free" elastic energy from the ground, reducing the amount of chemical fuel your muscles need to burn.
How to Train for Speed Efficiency
You don't need to spend hours on a track to improve this pillar. It’s about quality over quantity.
The Power of "Strides"
The simplest way to build efficiency is to add strides to the end of your easy runs.
- The Workout: 6 x 20 seconds at about 90% of your maximum speed.
- The Focus: Don't "sprint" with tension. Focus on being tall, light, and relaxed. Focus on a quick turnover (cadence) and "soft" landings.
Hill Sprints
Short, steep hill sprints (8–10 seconds) are "strength training in disguise." Because of the incline, your body is forced into proper biomechanical alignment, and you build explosive power that translates directly into a more efficient stride on the flats.
The "Quiet" Test
Next time you’re running or cycling, listen to yourself. Are your feet slapping the pavement? Is your chain clacking? Efficient athletes are quiet. They move through the environment with minimal friction and impact.
Why Efficiency is the Final Layer
Pillar 4 is the "polish" on the engine. You can have all the fitness in the world, but if you are an "aerodynamic brick," you will always be limited. By focusing on speed efficiency, you ensure that every ounce of aerobic energy you’ve built is used to propel you toward the finish line.
The Bottom Line: Don’t just build a bigger engine—build a more efficient machine. When you combine durability, threshold, execution, and efficiency, you become an unstoppable endurance athlete.
