The relationship of heel contact in ascent and descent from jumps to the incidence of shin splints in ballet dancers.
I conducted a study to determine whether ballet dancers with a history of shin splints make heel contact on ascent and descent from jumps less often than dancers without this history. Sixteen dancers were filmed as they executed a sequence of jumps at two different speeds. Eight of the subjects had a history of shin-splint pain; eight had no such history. The film was viewed on a Super 8 movie projector. Heel contacts on ascent and descent from jumps were counted. Double heel strikes (heel rise between landing and pushing off) were also counted. A nonparametric t test showed no differences between the two groups in the number of contacts on ascent or descent. The dancers with a history of shin splints, however, demonstrated more double heel strikes (p = .02) than the other group. Clinically, this finding may represent a lack of control or a tight Achilles tendon or both. Further study is necessary to confirm these theories. For treatment and prevention of shin splints, a clinician must evaluate a dancer's jumping technique and then provide systematic training to develop the skin strength, flexibility, and coordination that make up control.
D000293:Adolescent; D000328:Adult; D001265:Athletic Injuries / Q000209:etiology*; D001696:Biomechanical Phenomena; D003615:Dancing; D006365:Heel; D006801:Humans; D007869:Leg Injuries / Q000209:etiology*; D008722:Methods; D009132:Muscles / Q000293:injuries*; D013314:Stress, Mechanical