Waghmare, Antariksh P2020-10-162020-10-162020-03Waghmare Antariksh P. Muscle Work While Running at Different Speed. International Journal of Scientific Study. 2020 Mar; 7(12): 3-132321-595X2321-6354http://imsear.searo.who.int/handle/123456789/209314Background: Running is a fundamental skill and requirement of all athletic activities. Therefore, there is a need to understand lower limb muscles function during running. This is also important for refining the existing knowledge regarding increased performance during sports activities. Aim: The aim of the study was to investigate the muscle work of different groups of lower limb muscles during running at different speeds. Material and Methods: In total, 15 individuals were involved in the study. All of the subjects were made to run in a sports lab providing three good trials of each speed at their convenient slow, comfortable, and fast running speeds. Data were gathered using Vicon®, electromyography, and inverse dynamics tools and analyzed using SPSS® version 22 program. Muscle force was calculated with the inverse dynamic model using the kinetic and kinematic data of the trials collected from the participants. Results: Hip flexors and knee extensors were found to have a major increase in muscle force when compared with slow to fast speeds while ankle flexors were found to show a steady increase in their muscle force with an increase in the speed. Similarly hip and knee angles showed a significant change in values while ankle angles did not change much during increasing speeds. Significance: Our study implies the importance of the muscle groups of the lower limb while changing pace during running. It is important for professional athletes recovering from an injury. They can concentrate on the rehabilitation of individual muscle groups required according to the speed their sport involves. Furthermore, they can focus on the development of an individual muscle which is performing more significantly according to the speed their sport requires.ElectromyographyLower limbs musclesRunning gaitJournal ArticleIndiaMBBS, MS, MCh, Department of Orthopaedic Surgery, TORT Centre, Ninewells Hospital and Medical School, Dundee, DD1 9SY, United Kingdom