I’ve had mornings where I get up but don’t feel able to work anymore. I felt like I was exhausted from the moment I woke up and had no strength left. Sitting at my desk, logging on to the company network, and opening my emails, that alone made me tired. This is, unfortunately, one of the signs of exhaustion at work, and you have to pay attention to it, otherwise, the breaking point will come. By then it will be too late and the burn-out will have set in.