Training & recovery guides

Practical explainers on HRV, recovery and workout readiness — written to be useful on their own, whether or not you use Fit4i.

Recovery

How to Adjust a Workout When Recovery Is Low

Practical ways to scale a session down instead of skipping it entirely — and how to tell the difference between tired and unwell.

HRV

Should I Train With Low HRV?

A low HRV reading doesn't automatically mean skip the gym. How to read it in context, and when it's actually worth backing off.

HRV vs Resting Heart Rate for Workout Recovery

Two related but different recovery signals, what each is better at catching, and why looking at both beats picking one.

Apple Watch & Health Data

How to Use Apple Watch Data for Workout Readiness

What Apple Watch actually measures that's useful for training decisions, and how to read the trends instead of a single day's number.