The Effect of Synchronous Beats on Human Gait during Unilateral Shoulder Load Carriage Swetambri Sonal Atreya Prof. Sneh Anand Faculty of Sciences, Jamia Hamdard, New Delhi Centre for Biomedical Engineering, IIT Delhi Biomedical Engineering Unit, AIIMS New Delhi

Load carrying positions

Muscle strain Distortion of the natural curve of the spine Rounding of the shoulders UnloadedLoaded

Effect of Load Carriage 4

Human Gait and Music

6 Parkinson's Stroke Applications of Music Therapy in Rehabilitation

Effect of Music 7 Music & rhythm Accompany motor activity Influence emotional & psychological aspects Improves temporal stride symmetry Treat disorders like stroke patients, Parkinson's disease, cerebral palsy

Purpose of the study HUMAN GAIT LOADED WITH BACKPACK ASYMMETRIC GAIT INTRODUCTI-- ON OF RHYTHMIC BEATS SYMMETRIC GAIT UNLOADED 8

Protocol Image Courtesy Prosthetics and Orthotics Workshop Department of Physical Medicine and Rehabilitation, AIIMS New Delhi

Stimuli Subjects were made to listen to ascending auditory beats; slow beats (60beats/min), medium beats (100 beats /min), fast beats (120 beats/min). Beats were recorded using a synthesizer/sequencer. 10

Analysis All the data was acquired at the 100Hz sampling frequency Data processing and analysis performed on MATLAB (The Math Works Inc, US). Karl Pearson Coefficient of Correlation 11

Results 12 Correlation between normal walk and 60 beats /min Correlation between normal walk and 100 beats /min Correlation between normal walk and 120 beats /min

Highest positive correlation was found with 100 beats/ min as compared to other tempi(r=0.7651,p<0.05). Auditory rhythm has a comprehensive effect on improvement of gait pattern (stride length) and surpasses the effect of load carriage. 13

References 14 Sheir-Neiss GI et.al.The association of backpack use and back pain in adolescents. Spine 2003; 28(9):922–30. Iwanaga M., Relationship between heart rate and preference for tempo of music, Percept Mot Skills 1995; 81(2): Hamish W. Mackie, The effect of simulated school load carriage configuration, Applied Ergonomics 2005 Grimmer KA, Williams MT, Gill T, The association between adolescent head-on-neck posture, backpack weight and anthropometric features. Spine 1999;24(21): Pascoe DD, Pascoe DE, Wang YT, Shim DM, Kim CK. Influence of carrying book bags on gait cycle and posture of youths. Ergonomics 1997;40(6): MM Panjabi, TR Oxland "Mechanical behaviour of the human lumbar and lumbosacral J Bone joint Surg Am. 1994;76: Malhotra MS, Sen Gupta J. Carrying of school bags by children. Ergonomics 1965;1:55-60

Introduction  Carrying heavy loads is known to cause a change in the gait.  Examined the gait pattern in subjects carrying backpack of 12% of their bodyweight while walking on a force platform.  Relationship between gait and synchronous beats was explored.  Determination of the impact of auditory rhythm in reducing effect of load on gait parameters (stride length) and eventually making them symmetric. 16