Parents who don’t want to vaccinate their kids may seem so distant from the rest of us that it’s hard to understand how they formed their views. But they all probably had friends and family who were around at the time, but didn’t know what to say.

I rarely feel stronger or faster or more totally badarse than when I’m running a track workout with short repeats. Today, I want to share that feeling with you.

Your DNA says a lot about you, and it’s likely that either you or a relative is represented in one of the DNA databases that are now being used to track down criminals.

But mailing in a vial of spit does not automatically put you in a database that law enforcement can access. Your privacy risk depends which type of company you’re working with.

Cold weather doesn’t have to stop you from running, but getting dressed is a puzzle: how do you keep from freezing your butt off, without overheating once you start to sweat? In this video, we show you exactly what to wear.

It’s arguably fine to tell little white lies to your friends and family. Many of us routinely lie to ourselves. But there is one person on this earth with whom you must be 100 per cent honest: your anaesthesiologist.

You could spend forever working out exactly how to live a healthy life — the internet is full of hacks meant to help you optimise each little detail. But honestly, most of the benefits of sleep, exercise, and diet come from just doing the basics right. So if you’re feeling overwhelmed, here’s where to start.

Cheers of encouragement are a great morale booster, but every marathon runner has fond memories of that spectator, the one who had the perfect snack or motivating words at a tough point in the race. Here’s how to be that angel.

With measles, mumps, and other previously eradicated diseases making a comeback, it’s more important than ever to make sure your vaccinations are up to date — especially if you’re an adult.

Herd immunity protects the most vulnerable among us; a lapsed pertussis vaccine may not pose much of a threat to you, but it could seriously harm an immunocompromised kid or elder.

Even if you live in a hilly place, you may find yourself avoiding hills when you run. They slow down your pace as reported by running apps. They also just feel really hard.

Have we all been neglecting our fingernails? OK, maybe just some of us? These slabs of keratin do a lot for us, so here’s how to keep them clean and healthy.

When I’m out enjoying nature, it seems a little weird to spray synthetic chemicals all over my body. So I always take a look at the “natural” insect repellents when I’m buying bug spray.

Some are legit, with EPA-registered ingredients that effectively repel bugs while being safe for skin. Others are made of nice-smelling herbs and wishful thinking.

Running may be one of the simplest fitness activities to pick up — you just need a pair of shoes and the open road — but it’s also hard on your body if you’re not used to it.

Core exercises will build up your abs, but they do nothing for the layer of fat on top of them. Likewise, no leg exercise can give you slimmer thighs. And yet headlines and tweets about shrinking specific body parts abound -- even when the articles themselves contradict the headline.

Hands up if you’ve ever woken up from an okay night of sleep, checked your phone, and found that your sleep was “low quality” or that you got very little “deep” sleep. How did you feel the rest of the day? Crappy? It’s possible you can blame your tracker, not your actual level of sleep, at least partially for how you felt.

So many exercises require nothing but a few moments (and either the confidence or privacy to get them done without worrying about looking silly). You can do squats while you brush your teeth, for example.

How much weight do you need to lift to get stronger? A new study suggests it isn’t as much as you think — but more is still better when it comes to muscle size.

Have you gotten out the door yet to join our running challenge? This April, we’re going to explore the different kinds of workouts runners do, to show you that it doesn’t have to be just one long painful slog.

As we head into the second week, let’s explore my least favourite variation (I promise it gets better from here), the tempo run.

Who doesn’t love running? OK, maybe a lot of us. (Personally, I hate running while I’m doing it, but I feel amazing afterward.) We ran together last September, and now it’s time to lace back up.

Video: To meet some of the most famous old people in the world, I flew to Costa Rica. Where most folks from my flight probably headed straight for the beach, the Lifehacker crew and I drove into the hot, dry hills of the Nicoya peninsula.