(cbs video)natsa&when barbara karayi heads out on her bicycle, she knows she's getting more than just fresh air. (sot - barbara karayi/cyclist)obviously i know it's good for my heart, and i can feel after i'm done cycling my blood pressure goes right down.new research published in the british journal of sports medicine reveals cycling might pay off big in the long run. (sky news) researchers studied the exercise habits of more than 80-thousand adults for over a decade. they found people who took part in certain sports of dying from cardiovascular disease -- they lowered their chance of dying from any health problem. (cbs)those who cycled routinely cut their health risks by 15 percent. (sot - dr. declan o'regan/cardiac radiologist) this is really the first time that scientists have been able to look at particular sports and clearly show that certain sports have a proven benefit. nats upa&.tennis (sky news) when it came to cardiovascular disease - people who played racquet sports cut their risk of death by more than half. (man in pool)swimming by 41 percent.(nats..aerobics class)(cbs)an