Endurance training of respiratory muscles improves cycling performance in fit young cyclists.

Of the five studies that used a protocol designed to enhance respiratory muscle strength and power, four showed no change in exercise V E after training [ 11 , 12 , 15 , 18 ], and one showed an increase that just failed to reach significance (P= 0.051, [ 17 ].

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For example, an examination of the results of fifteen studies that report exercise V E before and after a period of respiratory muscle training reveals the following: eight studies report no change in V E after training [ 4 , 7 , 10 - 13 , 15 , 18 ], two show a decrease [ 2 , 3 ], two show an increase [ 6 , 8 ] and three show a clear trend towards an increase [ 5 , 9 , 17 ].

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