breathe in for 3 seconds and breathe out for 6 seconds. This is a common technique while meditating.
by breathing heavily in & out
The red blood cells pick up oxygen from the air that is inhaled into the lungs. When the red cells pick up the oxygen from the air, they expel carbon dioxide into the lungs to be exhaled.
In through your nose, out through your mouth unless otherwise directed.
Yes. Breathing is always a positive.
See, when you exercise you get your heart pounding and beating really fast so when you stop to take a break your heart is still beating fast