I'm sure we all know by now that there is a certain number of hours you can work per week before efficiency goes downhill. Even if you don't feel it, it's happening.
Sadly, this post doesn't use any real data, but instead uses an anecdote about playing a video game too long.
Also 'too much' by definition is damaging. If it wasn't 'too much' then it wouldn't be bad. By definition.
It's tough to use real data because it is subjective. All I am saying is one should at-least give oneself a chance to find out what that threshold is. The books that I recommended in that post helps in that. Also, the Pivotal tracker suggestion works for me. Probably it will work for others too. But, do people that mindlessly work even know it is necessary?
Sadly, this post doesn't use any real data, but instead uses an anecdote about playing a video game too long.
Also 'too much' by definition is damaging. If it wasn't 'too much' then it wouldn't be bad. By definition.