If you eff and blind in the gym, you might actually be doing your body some favours.
Thatβs according to new research, which suggests that muscle strength and stamina can be boosted by swearing.
Psychologists conducted tests in which volunteers had to swear before intense sessions on an exercise bike, or squeezing a device that measures hand grip strength.
In both experiments swearing led to significant improvements in performance compared with uttering βneutralβ words.
The study followed up earlier work that showed how swearing increases pain tolerance, helping explain the common reaction to hitting oneβs thumb with a hammer.
Lead author of the study, Dr Richard Stephens, from the University of Keele, said: βWe know from our earlier research that swearing makes people more able to tolerate pain. A possible reason for this is that it stimulates the bodyβs sympathetic nervous system - thatβs the system that makes your heart pound when you are in danger.
βIf that is the reason, we would expect swearing to make people stronger too, and that is just what we found in these experiments.β
Surprisingly, increases in heart rate and other expected changes linked to the βfight or flightβ response were not seen in the latest tests.
βWhy it is that swearing has these effects on strength and pain tolerance remains to be discovered,β Dr Stephens added.
βWe have yet to understand the power of swearing fully.β
The findings were presented at the British Psychological Societyβs annual meeting taking place in Brighton.
In the first experiment, 29 volunteers with an average age of 21 pedalled hard on an exercise bike for half a minute while repeating a swear word or a neutral word.
Peak power was increased by an average 24 watts by swearing, the scientists found.
The second experiment involved 52 participants of about the same age undergoing tests of hand grip strength.
Again, the volunteers were asked to swear or utter a less emotionally charged neutral word while measurements were taken.
Swearing boosted grip strength by 2.1 kilograms on average.
Dr Stephens said study participants were invited to use a swear word they would typically utter if suffering a bang on the head. Common examples included βfuckβ and βshitβ.
Allowing volunteers to choose their own swear words ensured the words meant something to them.
The words were uttered in a βsteady and clearβ voice in order to avoid the emotional effect of shouting.
Dr Stephens said: βIt doesnβt seem to be related to autonomic (fight or flight) arousal. We have some suggestions about what might be behind this effect which will need further research.
βIt could be that it involves the pain relief effect we registered before. Pain perception and pain relief are quite complex things. Swear words have a distracting effect.
βIf youβre asked to squeeze a hand gripper as hard as you can thereβs a certain amount of discomfort, and it could be that this is reduced by being distracted.
βSwearing seems to be a form of emotional language. Perhaps itβs the emotional effect of the words that leads to the distraction, but this is just speculation at the moment.β