Is it safe to exercise outdoors when the air quality is bad?

As smoke from wildfires in Canada migrates south and blankets the northern United States with air the color and aroma of char, many people are probably wondering: Should I exercise outside in these conditions?

The answer, experts say, depends on your health, fitness and age. Here are answers to common questions about working out in smoke-filled air.

Your Move columnist Gretchen Reynolds has more advice to help you get moving.

Just getting started at the gym? Doing these 6 exercises, once a week, will make you stronger.

Is your workout followed by a day of sitting? Find out what to do instead to stay active.

Feeling sluggish? It might be your microbiome — here's what to know about its effects on motivation.

Short on time? You can do this speedy scientific workout just about anywhere.

Is it better to work out in the morning or at night? We can help you decide.