There is no doubt in my mind that when people are stressed and worked to the bone they are less productive - it's common sense.
A recent study into productivity at work took into consideration those over the age of 40 - and my feeling is that the same could be said for all workers, regardless of age: a three-day working week is optimal and part-time employment is king.
This study aligns itself with the ongoing crusade for flexible working hours, but that is something we should all be taking seriously and reports like this don't fully address the real story.
A frightening recent study (published in Science Alert) reported that individuals working 55 hours or more per week had a 33% greater risk of stroke and a 13% increased risk of developing coronary heart disease.
Companies promote wellness programmes which include flexible working, based on the idea that your health affects your work but ignore the fact that the reverse can also be true.
It shouldn't be about packing as much into your day as possible so that you pass out as soon as you hit your pillow, but about using your time to unwind and do the things that help you keep your head above water.
If employers supported their employees by promoting wellness and mindfulness, and offering flexible working, they, too, would benefit from happier, more productive teams.
It doesn't matter what age they are or how many hours they work a week, without your health you have nothing.