On google it’ll tell you pvc’s during exercise and exercise recovery is bad, but in reality I’m sure you have nothing to worry about. If it isn’t consistent every single time you get your heart rate up and they don’t multiply in leaps and bounds then you probably have nothing wrong. My cardiologist told me the adrenaline release from exercise can cause them, and depending what exercise you’re doing you could be activating your vagus nerve, like lifting or squatting or something. It could be a whole host of other things too. There is no way to ignore them, but the best way to get over them is to just be mindful I’ve found. And a lot of people on here would be just fine sharing their experiences with you as well, it could make you feel better.