There are so many things that sap the life out of people in the workplace. Red tape, BS, blowhards, drama, low expectations (very common, shocking isn't it?), decaf, learned helplessness, yada yada yada.
When the manager adds nothing amazing to the team/dept/workday, he/she becomes another drain. Not even neutral. Boring and uncatalytic managers subtract.
Your employees are coming back from a 3-day holiday. They have had too much beer and sun and they need management that electrifies them back to life and into their work "zone."
What do ya got under that truck of yours? Perhaps you need a B12 shot.
As Gandhi never said, but would have, had he thought about the profession of management, be the source of wonder your team members are secretly begging for every night before they cry themselves to sleep.