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Table 5 Activity classes and sensor placement of the statistical machine learning approaches

From: Systematic review on the application of wearable inertial sensors to quantify everyday life motor activity in people with mobility impairments

First author # of classes Names of classes # of sensors Sensor positions Type of sensors
Ahmadi [61] 4 Sedentary (lying and sitting), standing, comfortable walking, and brisk walking 2 Pelvis and forearm (dominant side) ACC
Albert [52] 4 Lying, sitting, standing, and walking 1 Pelvis ACC
Albert [43], Sok [50] 6 Lying, sitting, standing, walking, stair climbing, and wheeling 1 Pelvis ACC
Andreu-Perez [48] 10 Lying, sitting, standing, lying-to-sitting, sitting-to-lying, lying-standing, standing-to-lying, sitting-to-standing, standing-to-sitting, and walking 1 Pelvis ACC
Biswas [110, 111] 3 Reaching and retrieving, lifting cup to mouth, and pouring and (un)locking 1 Forearm (affected side) ACC and GYRO
Brogioli [29], Popp [32] 2 Passive and active wheeling 4 Trunk, forearm (bilateral), and wheelchair ACC and GYRO
Capela [46] 6 Lying, sitting, standing, walking, stair climbing, and activities of daily living 1 Pelvis ACC
Capela [47] 6 Lying, sitting, standing, walking, stair climbing, and activities of daily living 1 Pelvis ACC and GYRO
Cheng [49] 6 Lying, sitting, standing, walking, stair climbing, and running 1 Pelvis ACC and GYRO
Ding [100] 4 Static, non-wheeling activity, passive wheeling, and active wheeling 2 Forearm (dominant side) and wheelchair ACC (forearm) and RS (wheelchair)
Fortune [99] 3 Static, non-wheeling activity, and active wheeling 3 Trunk and upper arm (bilateral) ACC and GYRO
García-Massó [62] 5 Sedentary (lying, sitting, and passive wheeling), transferring while sitting, active wheeling, housework, and arm-ergometer 2 Forearm (bilateral) ACC
Hester [87] 10 Walking, walking on uneven surfaces, walking up a ramp, walking down a ramp, stair climbing up, stair climbing down, walking over an object, turning, walking while carrying an object, and opening a door 5 Forearm (bilateral), shank (bilateral), and walking aid ACC and GYRO
Hester [88] 10 Walking, walking on uneven surfaces, walking up a ramp, walking down a ramp, stair climbing up, stair climbing down, walking over an object, turning, walking while carrying an object, and opening a door 2 Shank (right) and walking aid ACC
Hiremath [101] 7 Static, passive wheeling, active wheeling, housework, activities of daily living, arm-ergometer, and playing basketball 3 Upper arm (dominant side), forearm (dominant side), and wheelchair ACC (upper arm and forearm) and GYRO (wheelchair)
Jalloul [42] 7 Lying, sitting, standing, walking, eating, writing, and reading 6 Neck, upper arm (unilateral), forearm (unilateral), pelvis, thigh (unilateral), and shank (unilateral) ACC and GYRO and MAG
Kiani [37, 38] 6 Lying, sitting, standing, transitions, walking, and unlabeled 3 Trunk, thigh (left and right) ACC
Laudanski [83] 5 Walking, stair climbing up (step over step), stair climbing up (step by step), stair climbing down (step over step), and stair climbing down (step by step) 2 Shank (bilateral) ACC and GYRO
Leuenberger [84] 3 Walking, stair climbing up, and stair climbing down 5 Trunk, forearm (bilateral), and shank (bilateral) ACC and BARO
Lonini [54] 5 Sitting, standing, walking, stair climbing up, and stair climbing down 1 Pelvis ACC
O’Brien [45] 6 Lying, sitting, standing, walking, stair climbing up, and stair climbing down 1 Pelvis ACC and GYRO and BARO
Popp [90] 4 Sedentary, low intensity, high intensity, and walking 3 Trunk, forearm (affected side), and shank (non-affected side) GYRO and BARO
Popp [98] 3 Low intensity, high intensity, and active wheeling 4 Trunk, forearm (bilateral), and wheelchair ACC and GYRO
Recher [59] 7 Sitting, standing, sitting-to-standing, standing-to-sitting, walking sideways, stair climbing, and moving objects 8 Trunk, pelvis, thigh (bilateral), shank (bilateral), and foot (bilateral) ACC and GYRO and MAG
Roy [57] 11 Supine-to-sitting, sitting, sitting-to-standing, walking, tooth brushing, hair combing, bowel movement, shirt buttoning, pant lifting, food cutting, and food lifting 8 Abdomen, lower back (bilateral), upper arm (bilateral), forearm (bilateral), thigh (affected side) ACC
Seiter [113] 6 Resting (lying & sitting), eating and leisure, cognitive training, medical fitness, kitchen work, and motor training 3 Forearm (bilateral) and thigh (non-affected side) ACC
Teknomo [51] 4 Sitting, walking, stair climbing, and running 1 Shank (non-affected side) ACC
Wade [55] 4 Sitting, standing, walking, and stair climbing 5 Pelvis, thigh (bilateral), shank (bilateral) ACC
Wu [85], Xu [91] 1 Walking 2 Shank (bilateral) ACC
  1. # Number, ACC accelerometer, BARO barometric pressure sensor, GYRO gyroscope, MAG magnetometer, RS reed switch