Blog
Coaching, recovery & the science of training smarter
Practical writing for personal trainers using HRV, sleep, and workload data to coach better.
June 3, 2026 · 6 min read
Training Readiness Score: What It Is, How It's Calculated, How to Use It
A readiness score combines HRV, sleep, resting heart rate, and workload into one number. Here's exactly how it's built and how to use it.
Read articleMay 27, 2026 · 6 min read
VO2 Max Training: What Coaches Actually Need to Program
VO2 Max is the single best predictor of long-term healthspan and the most ignored number on your client's Apple Watch.
Read articleMay 20, 2026 · 5 min read
RPE vs Readiness: How to Use Both Signals Without Double-Counting
RPE tells you how hard a set felt. Readiness tells you how hard it should be. Here's how to combine both without double-counting.
Read articleMay 13, 2026 · 7 min read
The Deload Week: When to Program It (and How to Know It's Working)
A deload isn't a week off — it's a deliberate 30–50% drop in volume to let fitness catch up to fatigue. Here's the data behind when to call it.
Read articleMay 6, 2026 · 7 min read
ACWR Explained: How to Avoid Overtraining Your Clients
ACWR is the simplest evidence-based tool a personal trainer has for spotting injury risk before it becomes injury.
Read articleApril 29, 2026 · 6 min read
Apple Watch for Coaches: Reading Recovery Data From Your Clients
Apple Watch is the most underused coaching tool in the gym. Here's which metrics to read and how to use them.
Read articleApril 22, 2026 · 6 min read
The Problem With Programming Workouts Blind
Most personalized training programs aren't actually personalized — they're personalized once, then run on autopilot.
Read articleApril 15, 2026 · 5 min read
How to Know If Your Client Is Ready to Train Today
A simple, repeatable system using HRV, sleep, and a 30-second conversation to decide if today is push, adapt, or recover.
Read articleApril 8, 2026 · 6 min read
What is HRV and Why Should Personal Trainers Care?
HRV is the single most useful recovery signal a coach can read. Here's what it actually measures and how to use it.
Read article