1️⃣ Training ends; leadership development doesn’t INSEAD’s 6 October essay follows 18 leaders after intensive programmes: peer groups can sustain change, but a comfortable alumni circle can also let old habits survive.
💡 Why it matters Measure behaviour months after leaders return. Use cross-functional follow-up to test what changed, not end-of-course satisfaction.
☕ Coffee talk Will that alumni group ask what changed at work, or book another reunion?
2️⃣ Sleep is a management condition A 6 October HBR article draws on a survey of 1,009 US managers and executives to examine sleep deprivation as a leadership-performance issue.
💡 Why it matters A 2026 Academy study linked soldiers’ poor sleep most strongly to conflict with senior colleagues. Fatigue can affect escalation.
☕ Coffee talk Would you want the team making its biggest call after a week of hidden sleep debt?
3️⃣ A lonely day can follow a leader home A study of 174 UK managers across 1,351 workdays found that daily loneliness predicted withdrawal from leadership tasks and staff; an experiment with 185 managers supported the link.
💡 Why it matters That withdrawal can feed another lonely day. Meeting-heavy calendars can hide a manager who has stopped engaging with the team.
☕ Coffee talk Who can a manager tell the awkward thing to before the team feels the distance?