A relação entre os níveis de vitamina D, força muscular e as lesões musculoesqueléticas em bailarinos

Abstract

Vitamin D in the body has several effects on body systems and can interfere with muscle activity. The objective of the present study was to identify vitamin D3 levels and to verify the impact of these levels on thigh muscle strength parameters and functional performance of classical ballet practitioners; characterize the health and socioeconomic conditions, life habits, sexual maturation and level of physical activity in dancers. The study had a prospective analytical cross-sectional design. The study sample consisted of 49 male and female dancers, enrolled in the Center for Professional Education in Arts Basileu França (CEPABF), in the city of Goiânia (GO). The concentration of Vitamin D was analyzed through Enzyme-linked Immunosorbent Assay (ELISA); the evaluation of muscle strength through the Muscle Strength Dynamometer of the knee joint and functional performance was evaluated through the Sit and Lift Test (SLT). For the better characterization of the sample we also used: annamese script; history of injuries, classification of the economic condition of the family of the participants through the ABEP Questionnaire 2015 (Brazilian Association of Research Companies), evaluation of the level of satisfaction with body image, evaluation of sexual maturation and type of foot dominance. It was observed that female prevailed in the sample, classified as eutrophic for BMI. 43% of the sample presented Hopovitaminosis D at the blood test. It was verified that 12 (24.49%) of the dancers presented a pubertal delay for the classification of the breasts or genitalia, when female or male, respectively, and 10 (20.41%) of the dancers presented a pubertal delay for the classification of pubic hair. As for body image distortion 23 (46.9%) had normal levels, 15 (30.6%) had mild distortion, 6 (12.2%) had moderate distortion and 5 (10.2%) had severe distortion. Concerning body image, 38 (77.6%) presented no concerns, 6 (12.2%) had mild concerns, 2 (4.1%) had moderate concerns and 3 (6.1%) had no concerns. serious concern. It was found that the mean score for the sit-up test was greater than 4.5. By Waterloo's inventory the predominant podal dominance was the right one in 34 (81%) of the dancers. The type of injury that most affected the dancers was the sprain (34.7%). The results revealed that there was a statistically significant difference between the percentage of thigh fatigue and vitamin D levels, in which dancers with normal vitamin levels had greater resistance to muscular fatigue. For the other force parameters analyzed no differences were found. The results obtained indicate that individuals with inadequate levels of this vitamin have less muscular resistance to fatigue and are therefore more susceptible to musculoskeletal injuries.