So today I got my snowmobile stuck and after about a minute of trying to dig it out and move it I could not catch my breath and I just didnt feel right afterwards... and 30 minutes later I still dont. I am 25 years old and otherwise pretty healthy I dont smoke or do drugs and I barley drink. But im worried about my cardio vascular health. I was thinking about doing some running or playing pick up hockey again just for some cardio. However my main goals are to get bigger and I dont want to compromise my size or hinder muscle gains. Any tips on how much cardio I should do and for how long and when?