Deep dives into training science, technology, and the future of fitness. Written by athletes, for athletes.
AI fitness coaches are getting scary good. We break down exactly when to use AI, when you need a human, and the hybrid approach that gives you 90% of the benefits at 20% of the cost.
Stop guessing. Learn the proven methods to track strength gains, muscle growth, and body composition — with specific tools, apps, and techniques that actually work.
A technical deep-dive into how Apple Watch accelerometer and gyroscope data powers automatic rep counting — the CoreMotion framework, signal processing, and machine learning behind it.
Zone 2 cardio is not just for runners. Here is how to use heart rate zones during strength training to optimize recovery, manage fatigue, and push performance.
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