Generalised Joint Hypermobility (GJH) is a blanket term used to describe an individual with several joints that are more flexible than is usual amongst the general population. Hypermobile individuals, who make up 3% of the population, have a heightened flexibility than that of the general population.
More of a physical 'quirk' than a condition, hypermobility is simply a variation in the way in which the joints are formed. This heightened flexibility is the result of the connective tissue of the joint structures (the ligaments and capsule) being more compliant than the usual range.
Hypermobile individuals possess a greater range of extension and flexibility than the general population. Generalised Joint Hypermobility is usually tested by the Beighton Score. The Beighton Score is a simple method to test for joint laxity and hypermobility, using a 9 point system to grade the individual's range of movement. For example, scoring a 6 would indicate Generalised Hypermobility Syndrome (GJH), whereas a 9 would indicate Joint Hypermobility Syndrome (JHS) - a more severe condition.
GJH is a general term for a mild case of hypermobility which should not be confused with joint hyper mobility syndrome (JHS) - a condition which results in ongoing joint pain and digestive problems, and requires medical care. Symptoms of JHS include severe joint stiffness, night pains that disrupt sleep, and poor co-ordination.
While generalised joint hypermobility is quite a common occurrence, heightened flexibility can be both a blessing and a curse. Mosts gymnasts and ballet dancers, for example, possess a degree of hypermobility, however they also have the conditioning, strength and muscle-control to be able to harness their hypermobility in a controlled and effective manner.
On the other hand, for many individuals without sufficient conditioning and fitness levels, GJH can cause injury and pain - particularly in the lower back, knee and pelvis. The lack of stability in the joints raises susceptibility to injury.
Alongside the risk of joint instability, an extended range of movement can cause biomechanic flaws (such as uneven gait, or uneven distribution of weight during movement). Furthermore, heightened joint flexibility without sufficient muscle flexibility range can cause strains and inflammation to the muscles and ligaments.
As such, a certain degree of general fitness, activity levels and exercise are vital for hyperbole individuals in guarding against the risk of pain and injury. Maintaining a healthy weight is also crucial in avoiding pain in the hypermobile individual. Excess body weight places additional strain on the joints.
A study by Leeds Metropolitan University found that hypermobile footballers had a significantly higher risk of injury than their less flexible team mates. Studying a Premier League team, researchers found that players identified as hypermobile by using the Beighton Score, were more susceptible to injury in training and matches than their team mates scoring an average mobility range.
However, an extended range of movement can also lend itself to athletic excellence. In an interview with the BBC, Dr Howard Bird, professor of rheumatology at Leeds University, commented, "If you can stabilise the joints you can use them to display and impress. Many sports people are probably better sports people because they are endowed with natural hypermobility and many sports people work hard to develop hypermobility."
Exercises such as Pilates and yoga help to develop muscle control, posture and flexibility, and are excellent choices for hypermobile individuals. Pilates focuses upon control and muscle strengthening - particularly the strengthening of the core (lower abominable muscles) which are vital to maintaining a correct posture and avoiding back pain. The core muscles effectively act as the body's natural 'girdle', supporting the back and surrounding joints.
Yoga, alternatively, generally places a greater emphasis upon muscle stretching and lengthening, and regular practice allows the hypermobile individual to effectively harness the benefits of their heightened flexibility, whilst conditioning their muscles to better support their extended range of movement.
Although it may seem counterintuitive, pain arising from GJH is often heightened by inactivity, as the inflamed muscles will tighten as a reaction to injury. Low-impact exercise, such as swimming, is a recommended way in which to stay active without adding strain to inflamed and over-worked muscles and joints. Heat therapy is also a very effective tool in treating low back and pelvic pain arising from hypermobility.
With the correct training and conditioning, hypermobility can be used as real athletic gift. The benefits of an extended range of movement can be utilised most powerfully, with sufficient fitness levels, body conditioning, and an added emphasis upon developing postural, core and muscular strength.