If you had the perception that you are very stressed out then your grey matter was fully 20 per cent smaller in volume than people who did not have that same feeling. This is the grey matter in your prefrontal cortex: It controls thinking, learning, planning, decision-making. That matters because when we are feeling more stressed, that is when we are at our most vulnerable in our inability to think our way out of it.

There are new studies showing that young men and men with more progressive views of what a father should be - which is not just a helper and fun parent, but actually a partner - are beginning to feel more work-life conflict than mothers are. They're trying to do what women have been doing for 30 years, and they're having a very stressful time of it - a harder time at work because we still expect men to be on 24-7, working 40 years straight.

What often matters more than the activity we're doing at a moment in time is how we feel about it.

Busyness is now the social norm that people feel they must conform to, Burnett says, or risk being outcasts.

Even when men do more housework and child care, a lot of times it's still women in charge, delegating, so you have all that noise in your brain. You're on a bike ride or picnic with your family, and it looks like leisure, but on the inside you are keeping track of everybody's emotional temperature, and did I pack this, what are the directions, how much time are we going to be here, do we have anything for dinner? It's like a toilet running all the time.

On a personal level, I do a "brain dump" where everything that's in my head that needs doing gets written down. It gives your brain a rest. And then I give myself permission not to do everything on that list. I'm much more clear about my priorities: What are those moments of connection that are most important to me? Today is a busy workday but it's also a snow day, so I'm going cross-country skiing with my husband. And then I'll come back and finish my work.

We live in a really crazy time when there is information coming at you, and there are so many demands on your time. It really comes down to choosing your own priorities and forgiving yourself a lot and checking your own expectations.