The geometric curvature of the spine during the sirshasana,the yoga’s headstand |
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| Authors: | Mário Hebling Campos Nayane Martins Giraldi Paulo Gentil Claudio Andre Barbosa de Lira Carlos A Vieira Marcelo Costa de Paula |
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| Institution: | 1. Laboratório de Avalia??o do Movimento Humano, Faculdade de Educa??o Física e Dan?a, Universidade Federal de Goiás, Goiania, Brazilmariohcampos@gmail.com;3. Laboratório de Avalia??o do Movimento Humano, Faculdade de Educa??o Física e Dan?a, Universidade Federal de Goiás, Goiania, Brazil;4. Faculdade de Educa??o Física e Dan?a, Universidade Federal de Goiás, Goiania, Brazil;5. Setor de Fisiologia Humana e do Exercício, Faculdade de Educa??o Física e Dan?a, Universidade Federal de Goiás, Goiania, Brazil;6. Ciência e Tecnologia de Goiás, Instituto Federal de Educa??o, Goiania, Brazil |
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| Abstract: | This study analysed the behaviour of the geometric curvature of the spine during sirshasana. The position of dorsal retroreflective markers was computed via stereophotogrammetric analysis in six males and five females (29.4 ± 8.8 years, 63.0 ± 11.4 kg, 1.66 ± 0.08 m average ± standard deviation]). The spinal points were projected onto the sagittal and frontal planes of the trunk, a polynomial was fitted to the data and the two-dimensional geometric curvature was quantified. The inferior lumbar lordosis decreased compared to the orthostatic position and gait, which may favour the posterior protrusion of the lumbar spinal nucleus pulposus in people with posterior herniation. The lateral deviation at the middle of the thoracic spine increases during sirshasana, which may reflect increased difficulties for postural control and spinal loads. It could be useful for promoting positive spinal structural and functional chronic adaptations for healthy participants, if the yoga programme is carefully planned and the spinal alignment is carefully monitored during a headstand. However, it may aggravate some spinal diseases, especially scoliosis. |
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| Keywords: | Vertebral column biomechanics exercise geometric curvature posture kinematics |
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