Research on Biomedical Engineering
http://www.rbejournal.periodikos.com.br/article/doi/10.1590/2446-4740.0380
Research on Biomedical Engineering
Original Article

Muscle electrical activity during exercises with and without load executed on dry land and in an aquatic environment

Santos, Indira Nayra Paz; Mendes, Izabela dos Santos; Lima, Mario Oliveira; Paula Júnior, Alderico Rodrigues de; Simioni, Andreza Ribeiro; Lucareli, Paulo Roberto G.; Lima, Fernanda Pupio Silva

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Abstract

Introduction: Muscle activity in the aquatic environment was investigated using electromyographic analyses. The physical properties of water and the resistance used may infl uence the response of the muscle during exercise. The objective of this study was to evaluate the electrical activity in water and on the fl oor during fl exion and knee extension exercises with and without load and aimed at understanding the muscular response while performing resistance exercises in water. Methods: The sample consisted of 14 volunteers between 18 and 35 years old who were subjected to active exercises involving knee fl exion and extension with and without load on the fl oor and in water. Electromyography was performed during the movement. Results: A signifi cant increase was found in the electrical activity of the rectus femoris muscle during exercises on the fl oor. The biceps femoris muscle showed increased electromyographic activity when resistance was used. A signifi cant increase was found in the electrical activity of the rectus femoris muscle compared with exercises with and without load and the moment of rest in immersion. The electrical activity of the rectus and biceps femoris muscles was reduced in exercises with load and without load in a therapy pool compared with on the fl oor. Conclusion: There was a reduction of the electromyographic activity in the aquatic environment compared with that on the ground, which could be attributed to the effects from hot water. Therefore, it is believed that resistance exercises can be performed early in a therapy pool, which will facilitate the prevention and treatment of musculoskeletal disorders.

Keywords

Electromyography, Hydrotherapy, Kinesiotherapy.

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