Rethinking Strength in Endurance Sports

Traditional endurance culture often separates strength and aerobic work into opposing categories. One builds muscle; the other builds stamina. One creates fatigue; the other demands freshness.

This binary thinking is flawed.

At its core, triathlon performance is not just about oxygen delivery. It is about how effectively the body uses force over time. Every pedal stroke, every stride, and every pull in the water is a force production event. The athlete who can produce the same force with less effort—or maintain force output longer—has a significant advantage.

Strength training improves:

• Neuromuscular efficiency
• Force production per stride or pedal stroke
• Fatigue resistance at submaximal intensities

In other words, strength training helps you do more with less.

Running Economy: The Hidden Performance Driver

Running is often the decisive discipline in triathlon, especially in Olympic and long-course racing. While aerobic capacity (VO₂ max) is important, it is not always what separates top performers.

Running economy—the oxygen cost of running at a given pace—is often the determining factor.

Stronger athletes tend to:

• Produce greater force with each ground contact
• Spend less time on the ground
• Maintain better posture and stiffness

This translates into less energy wasted per stride.

Strength training, particularly when paired with high intent (moving weights explosively), improves the stiffness of the muscle-tendon system. This allows the body to store and release elastic energy more effectively—similar to a spring.

Velocity-based training enhances this process by ensuring that lifts are performed with maximal intent, not just maximal load. The goal is not grinding reps, but producing force quickly and efficiently—qualities that directly transfer to running mechanics.

Enter Velocity-Based Training

Velocity-based training solves this problem by shifting the focus from how much weight is lifted to how it is lifted.

Instead of prescribing a percentage of 1RM, VBT uses bar speed to guide intensity.

For example:

• Faster velocities correspond to lighter, more explosive efforts
• Slower velocities indicate heavier, strength-focused work

Because velocity reflects the athlete’s current state, it automatically adjusts for daily readiness.

If an athlete is fatigued:

• Bar speed decreases
• Load is reduced accordingly

If an athlete is fresh:

• Bar speed increases
• Heavier loads can be used safely

This creates a built-in autoregulation system—one that is particularly valuable in triathlon, where fatigue is constantly changing.