Optimized scoring tool to quantify the functional performance during the sit-to-stand transition with a magneto-inertial measurement unit

Abstract

Background: Sit-to-stand is used as a qualitative test to evaluate functional performance, especially to detect fall risks and frail individuals. The use of various quantitative criteria would enable a better understanding of musculoskeletal deficits and movement strategy modifications. This quantification was proven possible with a magneto-inertial unit which provides a compatible wearable device for clinical routine motion analysis. Methods: Sit-to-stand movements were recorded using a single magneto-inertial measurement unit fixed on the chest for 74 subjects in three groups healthy young, healthy senior and frail. MIMU data was used to compute 15 spatiotemporal, kinematic and energetic parameters. Nonparametric statistical test showed a significant influence of age and frailness. After reducing the number of Interpretation: Sit-to-stand measured by a single magneto-inertial unit and dedicated post processing is able to quantify subject's musculoskeletal performance and will allow longitudinal investigation of aging population.

Unobtrusive Sensors for the Assessment of Older Adult’s Frailty: A Scoping Review

“…However, the remaining 14 studies monitored the participants during simulated activities in the lab. Nine studies on STS transitions replicated situations where people stand up and sit back down after performing some additional tasks by analyzing elders’ movements during a single SiSt or stand-to-sit (StSi) transition [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ]. One of the studies on activity level [ 98 ] and the study on heart rate [ 110 ] monitored the participants while they traveled across a circuit of different daily activities in the lab.…”

“…Transparent studies relying on STS transitions measured parameters such as duration, acceleration (mean and maximal), velocity (mean and maximal), trunk angular velocity (mean and maximal), maximal jerk, peak power, vertical acceleration range, and number of postural transitions [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ]. Transparent studies on gait patterns measured parameters such as gait speed, gait variability, gait asymmetry, gait irregularity, daily walking time, total walking duration, and number of walks per day [ 71 , 72 , 73 , 74 , 75 , 76 ].…”

“…Precisely, only ubiquitous wearable sensors among all body-worn devices have involved transparent activities in all the studies: 10 studies with waist-mounted IMUs [ 47 , 53 , 73 , 74 , 87 , 89 , 90 , 94 , 95 , 96 ] and two studies with wrist-worn sensors [ 110 , 111 ]. Similarly to waist-mounted IMUs, nine studies involving an IMU on the chest have involved transparent activities [ 46 , 47 , 48 , 49 , 55 , 56 , 71 , 86 , 97 ] (which only represent around half of all the studies with a chest-mounted IMU). However, while only two of the 10 studies with waist-mounted IMUs used simulated transparent activities, five of the nine studies on chest-mounted IMUs did.…”

Postural transitions detection and characterization in healthy and patient populations using a single waist sensor

“…As there was a variety of populations performing the PTs in this study, the discriminative power of the kinematic parameters could be studied. It has been shown in [32] that the spatiotemporal and kinematic parameters extracted during sit-to-stand transitions can help clinicians detect individuals with frailty and abnormal functional capacities.…”

“…Moreover, they have been already used to instrument the 5xSTS [29] or the 30SCT [30] tests. Kinematic parameters extracted from such instrumented assessments have been shown to have greater clinical relevance than the conventional clinical approach [31,32]. Wearable sensors have provided an objective tool to evaluate PTs during daily activities as well.…”