The effects of task execution variables on resultant vertical ground reaction force acting on foot sole during squat lifting

Vahdat, Iman; Ghomsheh, Farhad Tabatabai

doi:10.1016/j.jbmt.2017.10.010

Cited by 3 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak value of vertical ground reaction force increased with increment in the speed of lifting. Increment in the box weight increased the peak vertical ground reaction force too (Vahdat and Tabatabai Ghomshe, 2018). Variability in ground reaction forces is much less well understood in the lifting literature.…”

Section: Discussionmentioning

confidence: 99%

The effects of load weight and load starting height on variability of lifting kinematics and kinetics

Norasi

Koenig

Mirka

2019

International Journal of Industrial Ergonomics

View full text Add to dashboard Cite

Trunk kinematic variables have been used to understand the risk of low back injuries in the workplace. Variability in the trunk kinematics as an individual performs a repetitive lifting task is an underexplored area of research. In the current study, it was hypothesized that workplace variables (starting height of lift and load weight) would have an impact on the variance in the kinematic and kinetic variables. Twenty participants performed 60 repetitions of an asymmetric lifting task under four different conditions representing two levels of load weight (5% or 10% of the participant's body weight) and two levels of starting height (80% or 120% of the participant's knee height). The Lumbar Motion Monitor was used to capture trunk kinematic variables from the concentric range of lifting motion while ground reaction forces were collected using a force platform. The primary dependent variables were the variance of kinematic and kinetic variables across these 60 repetitions. The results showed a significant effect of starting height on the variance of sagittal plane trunk kinematics with the lower starting height generating an increased variance (sagittal range of motion increased by 55%, average sagittal velocity increased by 95%, peak sagittal velocity increased by 105%, and peak sagittal acceleration increased by 130%). There was no consistent significant main effect of either independent variable on the variance of the transverse plane kinematics. Additionally, there was no significant effect of load weight on the variance of any trunk kinematic variables tested. In terms of ground reaction forces, it was shown that the starting height of the load had a significant effect on the variance of peak vertical ground reaction force, while the weight of the load had a significant effect on the variance of the peak shear force.

show abstract

Section: Discussionmentioning

confidence: 99%

The effects of load weight and load starting height on variability of lifting kinematics and kinetics

Norasi

Koenig

Mirka

2019

International Journal of Industrial Ergonomics

View full text Add to dashboard Cite

show abstract

“…The vertical ground reaction forces during squatting were taken from previous work by Vahdat and Tabatabai [17]. In the present study, the squat lifting was assumed to be performed in slow motion, hence the acceleration of COM of each segment and its angular acceleration were approximated to be nearly zero.…”

Section: Methodsmentioning

confidence: 99%

Determination of Joint Load of Human Lower Limb by Using 2D Inverse Dynamics Modelling

Intan

2019

IJEAT

View full text Add to dashboard Cite

The human lower limb is a major part of the human body that is exposed to high joint load during daily activities. Different lifestyles and cultural activities can affect the loading condition generated at the joint during motion. For instance, deep squatting is more frequently performed by Asians compared to Europeans e.g. kneeing on tatami among Japanese and sitting position during prayer among Muslims. The aim of this research is to determine the joint load of the human lower limb during the squat lifting movement by using inverse dynamics of 2-dimensional (2D) human lower limb model. The 2D inverse dynamics modelling was used to describe and compute all the joint force reactions from the known ground reaction and lower limb kinematics. In this study, 2D human lower limb model was analysed during the squat lifting movement. Inverse dynamics computation was performed using MATLAB programming based on Newton-Euler equations to determine the joint forces and moments. The joint loads at ankle, knee and hip joints for every knee flexion angle were obtained and the maximum forces at the ankle, knee and hip were 613.9, 614.1 and 596.1 N, respectively.

show abstract

A Critical Review on Risk Assessment Methods of Musculoskeletal Disorder (MSD)

Siddhaiyan,

Naveen Kumar,

Ramya

et al. 2023

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

The effects of task execution variables on resultant vertical ground reaction force acting on foot sole during squat lifting

Cited by 3 publications

References 13 publications

The effects of load weight and load starting height on variability of lifting kinematics and kinetics

The effects of load weight and load starting height on variability of lifting kinematics and kinetics

Determination of Joint Load of Human Lower Limb by Using 2D Inverse Dynamics Modelling

A Critical Review on Risk Assessment Methods of Musculoskeletal Disorder (MSD)

Contact Info

Product

Resources

About