Thereof, can you use AirPods while working out?
You really shouldn't wear AirPods while exercising. They are not sweat- or water-resistant. As the AirPods don't have an official IP rating against water or dust, you should not expect them to survive prolonged contact with liquid, like sweat.
Subsequently, question is, can you wear AirPods while running? Apple AirPodsThat's a pain. Note that Apple does not offer a water-resistance rating for the standard AirPods. They seem to withstand light sweat just fine -- and plenty of people use them at the gym and for running -- but it's unclear how much moisture they can withstand because they aren't actually sweat resistant.
In this way, does sweat ruin AirPods?
The lack of any kind of IP certification means the AirPods are not sweat-resistant as well. This does not mean you cannot use the AirPods while working out. Until and unless you sweat a lot or are into some form of heavy training which makes you sweat like a pig, you can wear your AirPods without any worries.
Can AirPods cause cancer?
There's no conclusive evidence that AirPods Pro or other Bluetooth headsets are dangerous. There's really no evidence that radio-frequency (RF) radiation can cause brain cancer or noncancerous brain tumors in people.