Three-Dimensional Joint Moments Analysis in a Vertical Quadrupedal Posture Associated with a Leg Release

1997 ◽  
Vol 105 (2) ◽  
pp. 136-143 ◽  
Author(s):  
F. Quaine ◽  
L. Martin ◽  
M. Leroux ◽  
P. Allard ◽  
J. P. Blanchi
Keyword(s):  
Three Dimensional ◽  
Joint Moments

Temporal Influences of Functional Knee Bracing on Torque Production of the Lower Extremity

2006 ◽  
Vol 15 (3) ◽  
pp. 215-227
Author(s):  
Brian Campbell ◽  
James Yaggie ◽  
Daniel Cipriani
Keyword(s):  
Lower Extremity ◽  
Outcome Measures ◽  
Repeated Measures ◽  
Exercise Intervention ◽  
Three Dimensional ◽  
Exercise Program ◽  
Joint Moments ◽  
Repeated Measures Design ◽  
Reaction Forces ◽  
Vertical Ground Reaction Forces

Context:Functional knee braces (FKB) are used prophylactically and in rehabilitation to aide in the functional stability of the knee.Objective:To determine if alterations in select lower extremity moments persist throughout a one hour period in healthy individuals.Design:2X5 repeated measures design.Setting:Biomechanics Laboratory.Subjects:Twenty subjects (14 male and 6 female, mean age 26.5±7 yrs; height 172.4±13 cm; weight 78.6±9 kg), separated into braced (B) and no brace (NB) groups.Intervention:A one-hour exercise program divided into three 20 minute increments.Main Outcome Measures:Synchronized three-dimensional kinematic and kinetic data were collected at 20-minute increments to assess the effect of the FKB on select lower extremity moments and vertical ground reaction forces.Results:Increase in hip moment and a decrease in knee moment were noted immediately after brace application and appeared to persist throughout a one hour bout of exercise.Conclusions:The FKB and the exercise intervention caused decreases in knee joint moments and increases in hip joint moments.

A Novel Three-Dimensional Gait Analysis System

2012 ◽  
Vol 569 ◽  
pp. 352-355 ◽  
Author(s):  
Tao Liu ◽  
Yoshio Inoue ◽  
Kyoko Shibata ◽  
Kozou Shiojima ◽  
Ji Bin Yin
Keyword(s):  
Wireless Local Area Network ◽  
Inverse Dynamics ◽  
Local Area Network ◽  
Reaction Force ◽  
Force Plate ◽  
Three Dimensional ◽  
Local Area ◽  
Area Network ◽  
Data Logger ◽  
Joint Moments

Three-dimensional (3D) lower limb kinematic and kinetic analysis based on ambulatory measurements is introduced in this paper. We developed a wireless sensor system composed of a mobile force plate system, 3D motion sensor units and a wireless data logger. 3D motions of body segment and triaxial ground reaction force (GRF) could be simultaneously measured using the system, and the data obtained from sensor units on thighs, shanks and feet could be transferred to a personal computer by wireless local area network (LAN). An inverse dynamics method was adopted to calculate triaxial joint moments. The accuracy of kinematics and kinetics (joint moments) assessment is validated against results obtained from the stationary measurement system based on camera movement analysis and force plates.

COMPARING METHODS FOR 3D INVERSE DYNAMICS ANALYSIS OF SQUAT LIFTING USING A FULL BODY LINKED SEGMENT MODEL

2020 ◽  
Vol 20 (03) ◽  
pp. 2050004
Author(s):  
IMAN VAHDAT ◽  
MOHAMAD PARNIANPOUR ◽  
FARHAD TABATABAI GHOMSHEH ◽  
NIMA TOOSIZADEH ◽  
ALI TANBAKOOSAZ
Keyword(s):  
Inverse Dynamics ◽  
Three Dimensional ◽  
Dynamics Analysis ◽  
Joint Moments ◽  
Bottom Up ◽  
Mean Values ◽  
Segment Model ◽  
Squat Lifting ◽  
Inverse Dynamics Analysis ◽  
Full Body

Objective: The main objective of this study was to assess the accuracy of bottom-up solution for three-dimensional (3D) inverse dynamics analysis of squat lifting using a 3D full body linked segment model. Least squares solution was used in this study as reference for assessment of the accuracy of bottom-up solution. Findings of this study may clarify how much the bottom-up solution can be reliable for calculating the joint kinetics in 3D inverse dynamics problems. Methods: Ten healthy males volunteered to perform squat lifting of a box with a load of one-tenth of their body weights. The joint moments were calculated using 110 reflective passive markers (46 anatomical markers and 64 tracking markers) and a 3D full body linked segment model. Ground reaction forces and kinematics data were recorded using a Vicon system with two parallel Kistler force plates. Three-dimensional Newton–Euler equations of motion with bottom-up and least squares solutions were applied to calculate joint moments. The peak and mean values of the joint moments were determined to check the quantitative differences as well as the time-to-peak value of the moment curves was determined to check the temporal differences between the two inverse dynamics solutions. Results: Significant differences (all [Formula: see text]-values [Formula: see text]) between the two inverse dynamics solutions were detected for the peak values of the hip (right and left sides) and L5–S1 joint moments in the lateral anatomical direction as well significant differences (all [Formula: see text]-values [Formula: see text]) were detected for the peak and mean values of the L5–S1 joint moment in all anatomical directions. Moreover, small differences (all RMSEs [Formula: see text]%) were detected between the two inverse dynamic solutions for the calculated lower body joint moments. Conclusions: The findings of this study clarified the disadvantages of the straightforward solutions and demonstrated that the bottom-up solution may not be accurate for more distal measures from the force plate (for hip and S1–L5) but it may be accurate for more proximal joints (ankle and knee) in 3D inverse dynamics analysis.

The Snatch Technique of World Class Weightlifters at the 1985 World Championships

1988 ◽  
Vol 4 (1) ◽  
pp. 68-89 ◽  
Author(s):  
Wolfgang Baumann ◽  
Volker Gross ◽  
Karl Quade ◽  
Peter Galbierz ◽  
Ansgar Schwirtz
Keyword(s):  
Knee Joint ◽  
Kinetic Parameters ◽  
Reaction Force ◽  
Three Dimensional ◽  
Joint Moments ◽  
Total Load ◽  
Precise Control ◽  
Lifting Technique ◽  
Reaction Forces ◽  
Knee Joint Moment

The purpose of this study was (a) to describe the snatch technique in terms of kinematic and external and internal kinetic parameters, and (b) to compare the results for athletes of different groups and weight categories. By means of three-dimensional film analysis and measurements of ground reaction forces during the 1985 World Championships in Sweden, it was possible to analyze the spatial movements and to calculate joint moments of force in each leg. Concerning the kinematics, a snatch technique starting with a strong pull toward the lifter could be established. The most interesting kinetic results are that the knee joint moments are relatively small (one third of the hip joint moments of force) and do not correlate very well with the total load. The best lifters seem able to limit the knee joint moment by precise control of the knee position with respect to the ground reaction force. Altogether, the results concerning the internal kinetic parameters question the logic of the classical division of the lifting technique into phases according to external kinetic parameters.

Three-Dimensional Knee Joint Moments During Performance of the Bodyweight Squat: Effects of Stance Width and Foot Rotation

2013 ◽  
Vol 29 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Sivan Almosnino ◽  
David Kingston ◽  
Ryan B. Graham
Keyword(s):  
Knee Joint ◽  
Internal Rotation ◽  
Rotation Angle ◽  
Three Dimensional ◽  
Principal Component ◽  
Moment Magnitude ◽  
Joint Moments ◽  
Flexion Moment ◽  
Knee Joint Moment ◽  
Healthy Participants

The purpose of this investigation was to assess the effects of stance width and foot rotation angle on three-dimensional knee joint moments during bodyweight squat performance. Twenty-eight participants performed 8 repetitions in 4 conditions differing in stance or foot rotation positions. Knee joint moment waveforms were subjected to principal component analysis. Results indicated that increasing stance width resulted in a larger knee flexion moment magnitude, as well as larger and phase-shifted adduction moment waveforms. The knee’s internal rotation moment magnitude was significantly reduced with external foot rotation only under the wide stance condition. Moreover, squat performance with a wide stance and externally rotated feet resulted in a flattening of the internal rotation moment waveform during the middle portion of the movement. However, i is speculated that the differences observed across conditions are not of clinical relevance for young, healthy participants.

Frontal Plane Moments Do Not Accurately Reflect Ankle Dynamics during Running

2005 ◽  
Vol 21 (1) ◽  
pp. 85-95 ◽  
Author(s):  
Kristian M. O’Connor ◽  
Joseph Hamill
Keyword(s):  
Ankle Joint ◽  
Subtalar Joint ◽  
Stance Phase ◽  
Three Dimensional ◽  
Frontal Plane ◽  
Joint Moment ◽  
Muscle Action ◽  
Universal Joint ◽  
Joint Moments ◽  
Joint Axis

The ankle joint has typically been treated as a universal joint with moments calculated about orthogonal axes and the frontal plane moment generally used to represent the net muscle action about the subtalar joint. However, this joint acts about an oblique axis. The purpose of this study was to examine the differences between joint moments calculated about the orthogonal frontal plane axis and an estimated subtalar joint axis. Three-dimensional data were colected on 10 participants running at 3.6 m/s. Joint moments, power, and work were calculated about the orthogonal frontal plane axis of the foot and about an oblique axis representing the subtalar joint. Selected parameters were compared with a paired t-test (α = 0.05). The results indicated that the joint moments calculated about the two axes were characteristically different. A moment calculated about an orthogonal frontal plane axis of the foot resulted in a joint moment that was invertor in nature during the first half of stance, but evertor during the second half of stance. The subtalar joint axis moment, however, was invertor during most of the stance. These two patterns may result in qualitatively different interpretations of the muscular contributions at the ankle during the stance phase of running.

Effect of 16-week corrective training program on three dimensional joint moments of the dominant and non-dominant lower limbs during gait in children with genu varus deformity

2020 ◽  
Vol 35 (1) ◽  
pp. 44.e1-44.e11 ◽  
Author(s):  
A.A. Jafarnezhadgero ◽  
M. Majlesi ◽  
H. Etemadi ◽  
R. Hilfiker ◽  
B.A. Knarr ◽  
...  
Keyword(s):  
Training Program ◽  
Three Dimensional ◽  
Varus Deformity ◽  
Lower Limbs ◽  
Joint Moments ◽  
Genu Varus
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