Why do female tennis players grunt?
Does the 'tennis grunt' serve a useful purpose, or is it simply a bit of gamesmanship designed to put off opponents?
Ever since Monica Seles was psyched out of the 1992 Wimbledon title after demands that she reduce the noise level of her grunts, this issue has been of great debate particularly in women's tennis.
A new book by Professor Alison McConnell from Brunel University in London, Breathe Strong, Perform Better, suggests that there is in fact a physiological reason for a tennis player to grunt and that being a distraction to opponents is merely an added bonus!
Professor McConnell explains:
"We all instinctively inhale just before we make a physical effort such as lifting furniture or swinging a racquet at a ball. We do this because holding air in the lungs helps to provide the stability required for injury-free and forceful movements of the trunk.
"Maximising the power of a tennis shot is created by transferring muscular force to the racquet head efficiently. A strong core and trunk is vital for this process because the force transmission starts below the players’ waist. The muscles in the trunk also contribute to racquet head speed by providing a rotational force between the hips and shoulders."
So how does this cause a player to grunt as they strike the ball? According to Professor McConnell it all comes down to breathing techniques.
"Efficient breathing is an incredibly important contributor to performance in all sports, but especially in a high-intensity, skill-based game like tennis. Any coach will tell you that the heart of a good stroke is a relaxed rhythm, part of achieving this rhythm is getting your breathing and stroke in tune."
Simply exhaling as soon as the player has hit the ball will dissipate the stability and control in their core, this can throw them off balance and break that all-important rhythm. The solution, according to Professor McConnell is through controlled, forceful exhalation using the larynx, or voice-box, to maintain stability in the core.
"Narrowing the opening of your lungs will slow down the rate of airflow from them, while maintaining stiffness in the trunk and control over the breathing rhythm. It is in using this technique that some players feel the need to grunt. Of course this braking action doesn't actually need to result in audible grunting but it is easier to coach the controlled exhalation if you can hear it. As a result some younger players may well be taught to grunt as a means of breath control."
Professor McConnell goes on to suggest that the reason grunting is more common amongst women that men is that their upper bodies are generally weaker than those of men and thus require stronger control and stability through breathing techniques.
For more information or to interview Professor Alison McConnell please contact Hannah Murray
Notes to Editors
Professor Alison McConnell is Professor of Applied Physiology at the Centre for Sports Medicine and Human Performance at Brunel University, London. Alison is the world's leading expert on breathing muscle training. Not only an accomplished academic she is also a successful inventor (www.powerbreathe.com). For more information on Alison please visit her Brunel staff profile.
Find out more about breathing training for sport at www.breathestrong.com and in Breathe Strong, Perform Better, published by Human Kinetics.