1. Accelerometer counts and raw acceleration output in relation to mechanical loading
- Author
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Alex V. Rowlands, Victoria H. Stiles, Rowlands, AV, and Stiles, VH
- Subjects
Adult ,Male ,Ground reaction force ,Physical activity ,Biophysics ,Biomedical Engineering ,physical activity ,Monitoring, Ambulatory ,Walking ,Motor Activity ,Accelerometer ,bone ,Running ,Acceleration ,GENEA ,Genea ,Humans ,Orthopedics and Sports Medicine ,ground reactionforce ,Bone ,Simulation ,Mathematics ,Brisk walking ,Hip ,biology ,Rehabilitation ,Biomechanics ,ActiGraph ,Geodesy ,biology.organism_classification ,Biomechanical Phenomena ,Impact - Abstract
The purpose of this study was to assess the relationship of accelerometer output, in counts (ActiGraph GT1M) and as raw accelerations (ActiGraph GT3X+ and GENEA), with ground reaction force (GRF) in adults. Ten participants (age: 29.4±8.2 yr, mass: 74.3±9.8 kg, height: 1.76±0.09 m) performed eight trials each of: slow walking, brisk walking, slow running, faster running and box drops. GRF data were collected for one step per trial (walking and running) using a force plate. Low jumps and higher jumps (one per second) were performed for 20 s each on the force plate. For box drops, participants dropped from a 35 cm box onto the force plate. Throughout, three accelerometers were worn at the hip: GT1M, GT3X+ and GENEA. A further GT3X+ and GENEA were worn on the left and right wrist, respectively. GT1M counts correlated with peak impact force (r=0.85, p0.82, p0.63 p
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