Criterion validity of 3D trunk accelerations to assess external work and power in able-bodied gait

Meichtry, André; Romkes, Jacqueline; Gobelet, Charles; Brunner, Reinald; Müller, Roland

doi:10.1016/j.gaitpost.2005.12.016

Cited by 32 publications

(34 citation statements)

References 31 publications

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“…Also, test-retest reliability for acceleration measures during gait has been proven to be high, with ICCs between 0.79 and 0.93 and CVs between 2.88 percent and 6.8 percent [15,20]. Meichtry et al reported high correlations (r > 0.82) for P values derived from trunk accelerometry and force plate measurements during gait and concluded the accelerometer is a valid measurement tool [18].…”

Section: Figurementioning

confidence: 99%

“…High reproducibility has been found using trunk accelerometry for the measurement of spatiotemporal gait parameters [14][15] and accelerations during gait [15,20]. In addition, Meichtry et al reported high validity for quantifying P using trunk accelerometry and force plate measurements during gait [18].…”

Section: Introductionmentioning

confidence: 98%

“…Several investigations have been conducted using accelerometers for the quantification of gait [13][14][15][16][17][18][19][20][21][22][23], chair rising [24][25], and balance [20,[25][26][27]. High reproducibility has been found using trunk accelerometry for the measurement of spatiotemporal gait parameters [14][15] and accelerations during gait [15,20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reliability and validity of trunk accelerometry-derived performance measurements in a standardized heel-rise test in elderly subjects

Schmid

Hilfiker²,

Radlinger³

2011

JRRD

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Abstract-This cross-sectional study evaluated the intrasession reliability and concurrent validity of trunk accelerometry (with force plate measurements) for vertical ground reaction force and external mechanical power recorded during a standardized heel-rise (HR) test in 54 elderly subjects (mean +/-standard deviation age 81.2 +/-6.4 yr). Peak force as well as peak and average power revealed intraclass correlation coefficients of >0.75 and low standard errors of measurement for both the force plate-and the accelerometer-based curves. Correlation coefficients for these variables ranged from 0.95 to 0.98. The accelerometry-derived variables indicated significantly lower absolute values. Trunk accelerometry can be used as a reliable and valid tool for the quantification of the HR test in the elderly population. However, due to several limitations in the protocol, the use of this tool can currently only be recommended in a test-retest manner. Therefore, more research is needed to fully validate this tool for clinical use.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reliability and validity of trunk accelerometry-derived performance measurements in a standardized heel-rise test in elderly subjects

Schmid

Hilfiker²,

Radlinger³

2011

JRRD

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“…Alternative techniques include the use of pressure sensitive insole systems 21 or instrumented shoes 22 . These systems allow for the direct measurement of contact forces on structures but generally only yield the vertical component and do not capture the global body behavior, e.g., the trunk motion 20 . Another ambulant technique employs combined magnetic-inertial sensors, i.e., accelerometry 20,23 .…”

Section: Discussionmentioning

confidence: 99%

“…These systems allow for the direct measurement of contact forces on structures but generally only yield the vertical component and do not capture the global body behavior, e.g., the trunk motion 20 . Another ambulant technique employs combined magnetic-inertial sensors, i.e., accelerometry 20,23 . Although this wireless technology is also encountering some challenges (e.g., soft-tissue artefacts 24 , connectivity, etc.…”

Section: Discussionmentioning

confidence: 99%

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Nimmen

Lombaert

Roeck

et al. 2016

JoVE

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For slender and lightweight structures, vibration serviceability is a matter of growing concern, often constituting the critical design requirement. With designs governed by the dynamic performance under human-induced loads, a strong demand exists for the verification and refinement of currently available load models. The present contribution uses a 3D inertial motion tracking technique for the characterization of the infield pedestrian behavior. The technique is first tested in laboratory experiments with simultaneous registration of the corresponding ground reaction forces. The experiments include walking persons as well as rhythmical human activities such as jumping and bobbing. It is shown that the registered motion allows for the identification of the time variant pacing rate of the activity. Together with the weight of the person and the application of generalized force models available in literature, the identified time-variant pacing rate allows to characterize the humaninduced loads. In addition, time synchronization among the wireless motion trackers allows identifying the synchronization rate among the participants. Subsequently, the technique is used on a real footbridge where both the motion of the persons and the induced structural vibrations are registered. It is shown how the characterized in-field pedestrian behavior can be applied to simulate the induced structural response. It is demonstrated that the in situ identified pacing rate and synchronization rate constitute an essential input for the simulation and verification of the human-induced loads. The main potential applications of the proposed methodology are the estimation of human-structure interaction phenomena and the development of suitable models for the correlation among pedestrians in real traffic conditions. Video LinkThe video component of this article can be found at

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Effect of obesity onset on pendular energy transduction at spontaneous walking speed: Prader–willi versus nonsyndromal obese individuals

Malatesta

Vismara

Menegoni

et al. 2013

Obesity

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Objective: To compare the mechanical external work (W ext ) and pendular energy transduction (R step ) at spontaneous walking speed (S s ) in individuals with Prader-Willi syndrome (PWS) versus subjects with nonsyndromal obesity (OB) to investigate whether the early onset of obesity allows PWS subjects to adopt energy conserving gait mechanics. Design and Methods: W ext and R step were computed using kinematic data acquired by an optoelectronic system and compared in 15 PWS (BMI ¼ 39.5 6 1.8 kg m À2; 26.7 6 1.5 year) and 15 OB (BMI ¼ 39.3 6 1.0 kg m À2; 28.7 6 1.9 year) adults matched for gender, age and BMI and walking at S s . Results: S s was significantly lower in PWS (0.98 6 0.03 m s À1) than in OB (1.20 6 0.02 m s À1; P < 0.001). There were no significant differences in W ext per kilogram between groups (PWS: 0.37 6 0.04 J kg À1 m À1; OB: 0.40 6 0.05 J kg À1 m À1; P ¼ 0.66) and in R step (PWS: 69.9 6 2.9%; OB: 67.7 6 2.4%; P ¼ 0.56). However, R step normalized to Froude number (R step /Fr) was significantly greater in PWS (6.0 6 0.6) than in OB (3.8 6 0.2; P ¼ 0.001). Moreover, R step /Fr was inversely correlated with age of obesity onset (r ¼ À0.49; P ¼ 0.006) and positively correlated with obesity duration (r ¼ 0.38; P ¼ 0.036). Conclusion: Individuals with PWS seem to alter their gait to improve pendular energy transduction as a result of precocious and chronic adaptation to loading.

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Criterion validity of 3D trunk accelerations to assess external work and power in able-bodied gait

Cited by 32 publications

References 31 publications

Reliability and validity of trunk accelerometry-derived performance measurements in a standardized heel-rise test in elderly subjects

Reliability and validity of trunk accelerometry-derived performance measurements in a standardized heel-rise test in elderly subjects

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Effect of obesity onset on pendular energy transduction at spontaneous walking speed: Prader–willi versus nonsyndromal obese individuals

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