Blog
Notes on training from the people building Peak Health. Load, fatigue, effort and rest, explained for people who train.
HRV isn't a readiness score. It's a question.Wearables distill heart rate variability into a traffic-light number. That's not what it is. HRV is a noisy signal that asks you questions — and the answer depends on knowing yourself.
RIR beats 1RM percentages for real-world liftingPercentage-based strength programs assume a stable 1RM. Your 1RM isn't stable — it moves every week with sleep, stress, and accumulated fatigue. RIR auto-regulates to what you actually have today.
ACWR: the endurance metric that predicts injury before it happensAcute:chronic workload ratio compares your last 7 days of training against your last 28. Stay in the sweet spot and your injury risk stays low. Spike above it and you're rolling the dice.
Zone 2 is simple. You're probably still doing it wrong.Zone 2 became a fitness buzzword and now everyone thinks they're doing it. Most self-directed runners drift into tempo pace. Real Z2 is uncomfortable because it's boring, not because it's hard.
Deloads aren't vacations. They're how you keep making gains.A deload week isn't a break from training — it's the structured light week that lets the hard weeks stay hard. Planned deloads prevent reactive ones. Here's the difference.