Good afternoon.

I run 10 km 4 times a week just to be in a good shape and health. My pace is about 6:30 and I want to increase my stamina to run longer without fatigue and short of breath.

What exercises should I do? Do I need do short sprints?

The second question: is abdominal breathing so important? When I practice it I feel dizzy.

There are no parks near my house so I have to run on asphalt or across the field. Besides shock absorbing running shoes what else do I need to protect my knees? Should I use a special running technique in this case?

Thank you.