Positive pre-professional training swimming breathing tube front breathing tube

Professional swimming breathing tube technology requirements:

1. Prone action when swimming， and the water tube into a 90-degree angle

2. The nozzle above the water at about 20CM

Professional swimming breathing tube action:

1. The upper body is relatively fixed position， because the body is not easy to shake caused by hand movements deform

2. reasons diameter tube， forcing the body to rely on the chest vigorously inhale， indirect exercise vital capacity

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