Stress has measurable and significant physical and mental health impacts (a Yale study found chronic stress can actually shrink your brain), and we hear quite a bit about it, as researchers continue examining its long and short-term influence. They've even determined that stress is contagious

We know that chocolate has very real anti-stress properties, and that eating a diet high in greens and veggies helps mitigate some of the negative physical effects of stress.

But what's not often talked about is that some stress is beneficial. This is not the chronic stress that can hurt you, but the heightened emotional state one feels before speaking in public or writing an important paper. Scientist have found that our abilities peak under moderate levels of stress. And as long as it doesn't go on too long, that short-duration stress isn't unhealthy.

A 2013 study at the University of California, Berkeley, found that “Some amounts of stress are good to push you just to the level of optimal alertness, behavioral and cognitive performance,” said Daniela Kaufer, associate professor of integrative biology at the UC Berkeley, in a news release.

Those stress hormones can help animals (and people) adapt to changing environments. For example, we are more likely to remember something if it was accompanied by some level of stress.

“I think intermittent stressful events are probably what keeps the brain more alert, and you perform better when you are alert,” post-doc Elizabeth Kirby told Forbes magazine.

But when those stressful events are continuous, the opposite occurs — the memory is impaired. 

So how do you know when stress is healthy or not? There isn't an exact answer, and on top of that, individual people vary in their response to stress. But one way to mitigate stress is to actively address it. Ignoring it by vegging out in front of the TV or drinking wine doesn't address the deeper levels (or causes) of stress. And those people who do manage stress — people who are generally skilled at managing their emotions — are more likely to perform at higher levels. 

So minimizing stress is tactic A, but tactic B is actively managing the stress and emotions you have in response. Getting quality sleep, meditating, exercising, banishing negative self-talk and engaging in positive thinking, deep breathing, spending time with friends, taking time off, and disconnecting from work are all active ways to deal with stress. 

Related on MNN: 

The opinions expressed by MNN Bloggers and those providing comments are theirs alone, and do not reflect the opinions of While we have reviewed their content to make sure it complies with our Terms and Conditions, MNN is not responsible for the accuracy of any of their information.