Freestyle should have continuous outflow while head is in the water so that at breath time, you can get a lung full. This becomes more important the longer the

Freestyle should have continuous outflow while head is in the water so that at breath time, you can get a lung full. This becomes more important the longer the event (eg miles) due to accumulated stress and lactic acidosis due to not breathing properly. That is, you should breath as close to running as possible.