Irish Dancers & G-Force
I hope these guys’ calculations are off …
This is some scary stuff if they’re right. Missy found an article earlier tonight which was talking about the damage Irish Dance does to a dancer’s body, and why.
Warning: Irish dancing can seriously damage your health. Engineers at Coventry University have discovered that Irish dancers’ ankles have to bear 14 times their bodyweight while executing certain steps and have compared the force with that experienced by fighter pilots.
The load is far greater than a person would experience while running. The researchers said one well-known Irish dancing step, known as the rock move, should be monitored because of its potential to cause injury.
Performers from Riverdance, as well as world champions, were monitored while dancing in a laboratory which measures the impact of various activities on the body. The study team, whose work is in the Journal of Dance Medicine & Science, had to check their readings because they did not believe how large the forces were. The measurements for Irish dancers were the highest recorded.
In the rock move, legs are crossed at the ankle and the dancer rocks from side to side on the balls of their feet. Most of the force is taken by ankle joints as the weight is transferred rapidly back and forth. The force was found to be 14 times bodyweight, while that on the Achilles tendon was 42.5 stone. The soles of some of the dancers’ feet bore 4.5 times their bodyweight.
“That’s 4.5G — fighter pilot stuff. If you were subjected to 4.5G long term, you would be at great risk of blacking out,” said James Shippen, a lecturer at Coventry University’s School of Art and Design.
“Obviously, Irish dancers are doing it in short bursts, but at that instant they are pulling fighter pilot loads on their feet.
“We take engineering principles and apply them to Irish dancers. The loads are enormous. It’s very punishing on the body. Classical ballet dancers’ loads are incredibly light, about one quarter the level.”
Sinead Whelan, director of Celtic Feet Irish Dance and Theatre Company in Coventry, took part in the study. “A lot of our dancers get injured but because a dancer’s career is so short we don’t, if we’re honest, take as much time out as the physios recommend,” she said.
Irish dancers suffer injuries similar to those of footballers, according to Whelan. In particular, they get knee injuries such as floating cartilage.
“James had to recalculate the force that went through our dancers’ legs about five times before he believed the data he was getting. He said they’re not dancers, they’re paratroopers,” Whelan said.
Obviously, I’m not a physicist so I have no idea if these guys’ calculations are right or not. I might be able to dredge up enough arcane (to me, anyhow!) knowledge to sit down and work it out, but I’m just really not that ambitious.
You can read the rest of it at the TimesOnline.