Superior gait performance and balance ability in Latin dancers.

Background: Latin dance consists of various fast and stability-challenging movements that require constant body adjustments to maintain proper posture and balance. Although human gaits are assumed to be symmetrical, several factors can contribute to asymmetrical behavior of the lower extremities in healthy adults. These include lower limb dominance, ground reaction forces, lower limb muscle power, foot placement angle, and range of joint motion. Gait impairment can lead to a high risk of falling, diminished mobility, and even cognition impairment. We hypothesized that Latin dancers might have a more symmetric gait pattern and better balance ability than healthy non-dancer controls. Methods: We investigated the impact of Latin dance training on gait behaviors and body balance. We recruited twenty Latin dancers and 22 normal healthy subjects to conduct walking experiments and one-leg stance tests, and we measured their kinematic data by inertial measurement units. We then defined four performance indexes to assess gait performance and body stability to quantify the potential advantages of dance training. Results: We found that the two gait asymmetric indexes during the walking test and the two performance indexes during the one-leg stance tests were better in Latin dancers compared with the healthy control group. The results confirmed the superiority of Latin dancers over the healthy control group in gait symmetry and balance stability. Our results suggest that Latin dancing training could effectively strengthen lower limb muscles and core muscle groups, thereby improving coordination and enhancing gait performance and balance. Conclusion: Latin dance training can benefit gait performance and body balance. Further studies are needed to investigate the effect of Latin dance training on gait and balance outcomes in healthy subjects and patients with gait disorders.

Unilateral brachial plexus injury as a complication of thoracoscopic sympathectomy for hyperhidrosis: a case report.

Unilateral brachial plexus injury is a rare complication of thoracoscopic sympathectomy, which is generally considered to be a simple and safe procedure. We report on a 26-year-old man who developed weakness and numbness of the right arm after thoracoscopic sympathectomy for hyperhidrosis. Electromyographic study revealed evidence of denervation in the upper trunk of the right brachial plexus. A nerve conduction study on the right axillary nerve revealed a reduced compound muscle action potential amplitude at the right deltoid muscle. We suggest that this complication was caused by stretch and/or compression when the arm was hyperabducted during the operation. The outcome was excellent, with almost complete recovery 3 months later. The complication can be prevented by minimizing operation time and avoiding hyperabduction of the arm. The prognosis for postoperative brachial plexopathy is usually good with conservative management.