After using crossramp at the gym for 5 mins, I find it tough to breathe. I cannot hold my breath for long while swimming and even if I do fast walking or climbing some stairs I start breathing heavily. I have noticed this in last 3 years only. Family history of heart and sugar but I am clear. I am a blood donor and overall in good health. I am hypothyroid since 6yrs & take 100mcg thyronorm daily. I have Rosacea (skin problem) and had an accident 5 yrs ago due to which I have a plate in my leg.