Academic journal article International Journal of Yoga

Motion Analysis of Sun Salutation Using Magnetometer and Accelerometer

Academic journal article International Journal of Yoga

Motion Analysis of Sun Salutation Using Magnetometer and Accelerometer

Article excerpt

Byline: S. Omkar, Meenakshi. Mour, Debarun. Das

Background: Sun salutation is a part of yoga. It consists of a sequence of postures done with synchronized breathing. The practice of few cycles of sun salutation is known to help in maintaining good health and vigor. The practice of sun salutation does not need any extra gadgets. Also it is very much aerobic and invigorates the body and the mind. sun salutation, which comprises 10 postures, involves most of the joints of the body. Understanding the transition phase during motion is a challenging task, and thus, new convenient methods need to be employed. Aims: The purpose of this study was to get an insight into the motion analysis of sun salutation during the transition from each of the 10 postures. Materials and Methods: A device MicroStrain sensor 3DM-GX1, which is a combination of magnetometers, accelerometers, and gyroscopes was used to measure the inclination and the acceleration of the body along the three axes. The acceleration obtained was then separated into gravitational and kinematic components. Results and Conclusions: The value of the gravitational component helps us to understand the position of the body and the kinematic component helps us to analyze the grace of the motion.


Many metals when combined appropriately and in right proportion yield an alloy, which has better properties. The best of orchestras is a harmonious combination of various instruments. Likewise, a sequence of postures when performed in synchronization with breathing becomes sun salutation [Figure 1]. This sequence consists of 10 subtly powerful postures set in a dynamic form performed in a single, conscious, graceful flow. The postures have been ingeniously combined with forward-bending poses countered with backward-bending ones. As the rays of the sun reaches every part of the globe, these sequence of postures ensures that the internal energy reaches every part of the body, hence the name sun salutation. Sun salutation does not need any gadgets and can be done in a limited frame of time and space. With the regular practice of the sun salutation, all the parts of the body are exercised and rejuvenated with vitality. Sun Salutation is practiced by millions of people. Different people perform it differently. In sun salutation, transition from one posture to another needs to be understood clearly to quantify the grace in the transitive pattern. The tool required to understand this transition is motion analysis.[sup] [1]

Research that has evaluated the energy expenditure of yoga indicates that yoga is essentially equivalent to moderate forms of exercise.[sup] [2] The available evidence suggests that the practice of yoga may be associated with an improvement in cardio respiratory fitness[sup] [3],[4] and both muscular strength and endurance.[sup] [5] A single study that evaluated the heart rate for standing yoga postures found lower heart rate and higher rate of perceived exertion for the yoga posture sequence compared with treadmill walking.[sup] [2] All of this suggests the need for research on fitness-related outcomes associated with the practice of yoga.[sup] [6]

In the areas of medicine, sports, video surveillance, and biomechanics, human motion analysis has become an investigative and diagnostic tool. Motion analysis is done to study the kinematic and the kinetic characteristics of the human system. Human gait, defined as the pattern of human locomotion, can be described by these kinetic or kinematic characteristics.[sup] [7]

Optical motion analysis systems are often used in the study of human movement. Optokinetic measurement system and force plates may be used to evaluate to what extent subjects are able to perform certain activities of daily living in a laboratory setting.[sup] [8] However, these motion analysis systems are quite expensive, difficult to be operated with only a limited capture volume,[sup] [9] and markers are easily obscured from vision resulting in incomplete data. …

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