Hey , I'm a trainer . If you were already participating in regular exercise then you can still continue as normal . The biggest risk is overheating, so just stay away from training on super warm days or if you find the gym you use Is hot and stuffy (I've been in some horrible places!)
Make sure you hydrate before during and after. And if you're worried wear a heart rate monitor .. 140-150bpm is the standard maximum but if you're fairly fit you just need to listen to your own body, I have been doing intervals to make sure my HR doesn't stay high for too long or , I do long moderate cardio where my hr is fitting at approx 160. Everyone is different .