Juhaimonen,
Anything's good but what are you doing there to improve your Cardiovascular fitness? If you work your heart and muscles with endurance type workouts you become more efficient at using oxygen.
I would reccomend running or swimming 45 minutes to an hour a day up to six days a week. If you're not already doing close to that work up to it slowly. It takes about 20 minutes to warm up so anything less than that is not really advancing your fitness.
TP
Anything's good but what are you doing there to improve your Cardiovascular fitness? If you work your heart and muscles with endurance type workouts you become more efficient at using oxygen.
I would reccomend running or swimming 45 minutes to an hour a day up to six days a week. If you're not already doing close to that work up to it slowly. It takes about 20 minutes to warm up so anything less than that is not really advancing your fitness.
TP