Methodology
Training Hard but Always Tired
Francesco Zen, founder of ZTraining · Last updated 20 June 2026
The diagnostic order
Recovery investigation first
Starting with sleep patterns specifically, since this is the most common root cause.
Nutritional investigation second
Checking whether intake actually supports the training load being placed on the body.
Workout inspection third
Looking for excessive volume or simply too many sessions for the recovery capacity available.
Why the order matters
The problem always surfaces by investigating each part of the setup individually, not by guessing. Going straight to "do less training" without checking sleep and nutrition first often misses the actual cause.
Related: Overtraining, signs and fixes · How much sleep for muscle and fat loss
He built Mr Z, an AI coach trained on his methodology to bring the same approach to a wider audience.