As the coronavirus pandemic has made indoor spaces too dangerous for crowds, many have taken to using the outdoors to get in exercise or simply get out of the house. But while being outside drastically reduces risk, officials warn that the virus can still spread in crowds if the proper precautions aren't taken. Now, experts are cautioning that you can still catch and spread COVID while jogging or cycling, suggesting that masks should be worn in some cases. Read on to see what this could mean for your next workout, and for more on what could increase your risk of catching the virus, check out If You've Done This Recently, You’re 70 Percent More Likely to Get COVID. Jogging presents a potential risk of spreading COVID. During an interview on Good Morning Britain on March 2, Trish Greenhalgh, PhD, an expert in primary health care at Oxford University, pointed out the risk of runners and joggers potentially infecting walkers and other joggers around them with their exhaled droplets. "There is no doubt the virus is in the air. There is no doubt you can catch it if you inhale air that someone else has exhaled," she warned.Greenhalgh explained that the deeper, stronger breathing of runners was what made it particularly concerning. "The exercising jogger—the puffing and panting jogger—you can feel their breath come and you can sometimes actually feel yourself inhale it, so there's no doubt that there is a danger there." Asymptomatic runners could spread the virus to passersby during a jog. A major cause for concern comes from the relatively high likelihood that some out exercising could be contagious with the virus. "Forty percent of COVID cases happen by catching it from people who have no symptoms," Greenhalgh explained. "So you're jogging along, you think you're fine, and then the next day you develop symptoms of COVID, but you've actually breathed that COVID onto someone perhaps you know, an old lady walking a dog or something like that." And for more on how you can stay safe, check out This Common Medication Could Save You From Severe COVID, New Study Says. How busy your jog or cycling route will be makes a major difference. Experts also pointed out that part of the issue for runners is the route they may choose to take, especially if they opt for a busier area where social distancing may not be possible. "It really depends how close they are to you and how heavily they're breathing," Devi Sridhar, PhD, professor of public health at the University of Edinburgh, told Good Morning Britain. "This can spread through the air and so it is important that runners should think—I do think where am I running and I'm trying to be attentive to pedestrians because the sidewalks are there for pedestrians in busy areas and high streets."But if there are fewer people around, joggers can feel more at ease: "[When] you're out in the park, take off your mask and run freely," she recommended. "I think we need some consideration for each other right now. We're in a pandemic and just, you know, think how it feels for other people. So if you're going to [run or] cycle in a busy area, wear a mask." Covering your face when you pass others is still important. Sridhar's recommendations fall in line with current guidelines from the U.S. Centers for Disease Control and Prevention (CDC). They state that anyone working out should "limit high-intensity activities to the outdoors" while also advising to wear masks in public settings and when "around people who don’t live in their household."But experts such as Anthony Fauci, MD, point out that using a face covering that can easily be pulled up when approaching others should suffice. When asked about wearing a mask while out cycling during an appearance on The Daily Show With Trevor Noah in September, Fauci replied: "No, not necessarily, but you should have [your mask] with you in case you come into close contact with people outside. If you're alone and there's nobody near you, and you're riding your bike, you don't need to wear a mask." And for more on how you can protect yourself against the coronavirus, check out These 3 Vitamins Could Save You From Severe COVID, Study Finds.