Training & Performance
Training & Performance articles and guides for endurance coaches.
Training & PerformanceMarch 18, 2026
Heat Stress and Your Training: What the Temperature Isn't Telling You
A 28°C day can hit harder than a 32°C one. Here's how heat stress actually works, how it affects your training load, and how Simma uses it to coach smarter.
Training & PerformanceMarch 10, 2026
Training Status Explained: What On Track, Building, and Overreaching Actually Mean for Coaching
Form scores tell you where an athlete is right now. Training status tells you whether you should be worried about it. Here's how it works — and why it matters across a squad.
Training & PerformanceMarch 5, 2026
Training Load Explained: ATL, CTL, TSB and What They Actually Mean for Coaching
ATL, CTL, and TSB don't have to be confusing. Here's what training load metrics actually mean — and how to use them to coach smarter across your squad.