Inhale in the direction of resistance and exhale in the direction of resistance. Resistance includes gravity and pulling force.
For example, the chrome dumbbell movement, which we use to exercise the biceps, is to inhale and exhale.
For example, when you push, put down the inhalation and push up the exhalation. Other actions and so on.
The first floor method is wrong, and we often breathe like this. This is because many people involuntarily close their breath during lifting or pushing. When they put it down, they will naturally exhale. If it is not the impact of a large weight is not recommended to close the gas, easy to lead to sports damage.