The Sleep Debt Problem: How City Professionals Can Review Training Load

Published: 25 March 2026 · By Bruno Dalledone

Sleep restriction can affect training and recovery, but individual responses vary. The useful question is whether the current training load is supported by observed performance, recovery and adherence.

What actually happens to your hormones on six hours

In one small controlled study, restricted sleep changed daytime testosterone in young men; it should not be treated as a forecast for every person or as a direct measure of physique change. Leproult & Van Cauter (2011) is the primary source. Coaching inference: review sleep alongside performance and recovery rather than assuming more training is always better.

Why more training makes it worse

Training is a stressor. When sleep is chronically shortened, training stress accumulates without adequate recovery, and cortisol burden compounds. Sleep deprivation also impairs neuromuscular output — you're working at higher perceived effort for a lower actual training effect. Adding more sessions in this state amplifies the problem rather than addressing it.

The uncomfortable arithmetic

There is no universal session-count rule. Compare the trend in performance, recovery and adherence, then retain or reduce volume in proportion to what the individual evidence supports.

What you can actually do

A well-structured programme can offer full and compressed options. When sleep is compromised, the next block can be adjusted; when pressure eases, the plan can be reviewed again. The decision follows the trend, not a guaranteed outcome.