scholarly journals The use of Bally-Valens-Rehab shoes to improve gait in patients following stroke

1999 ◽  
Vol 55 (2) ◽  
pp. 18-22
Author(s):  
Jan Kool ◽  
P. Oesch ◽  
U. Sloksnath ◽  
O. Knusel
Keyword(s):  
Lateral Force ◽  
Step Length ◽  
Order Effects ◽  
Ground Reaction Forces ◽  
Randomised Study ◽  
Normal Gait ◽  
Reaction Forces ◽  
Opposite Order ◽  
One Year ◽  
Anterior Posterior

A randomised study was conducted to determine the influence which the Bally-Valens-Rehab shoes may have on gait in patients following stroke. The 11 subjects were all independent ambulators who were more than one year post stroke. Measurements were performed twice in opposite order to balance order effects. The reliability of the measurements was good (r>0.97). With the Bally-Valens-Rehab shoes, velocity improved by 8,6% from an average of 0.59 to an average of 0,64 m/s (p=0.021). Step-length gained 6,2% (42,1 cm to 44,5 cm, p=0.026) and endurance improved from 119 to 126 m/3 minutes (p=0.016). Meanwhile, ground reaction forces revealed a decrease in lateral force indicating a narrower, more normal gait (p=0.059). The anterior-posterior force increased significantly (p=0.021) showing that the shoes enhance heel-rise. The measurements confirmed the subjective findings and showed that use of the Bally-Valens-Rehab shoes in stroke patients may improve gait and enhance rehabilitation.

Anterior-posterior ground reaction forces across a range of running speeds in unilateral transfemoral amputees

2020 ◽  
pp. 1-12
Author(s):  
Hiroyuki Sakata ◽  
Satoru Hashizume ◽  
Ryo Amma ◽  
Genki Hisano ◽  
Hiroto Murata ◽  
...  
Keyword(s):  
Ground Reaction Forces ◽  
Reaction Forces ◽  
Transfemoral Amputees ◽  
Anterior Posterior

scholarly journals Effect of Toe Type on Static Balance in Ballet Dancers

2020 ◽  
Vol 35 (1) ◽  
pp. 35-41
Author(s):  
Momoko Kizawa ◽  
Toshito Yasuda ◽  
Hiroaki Shima ◽  
Katsunori Mori ◽  
Seiya Tsujinaka ◽  
...  
Keyword(s):  
Postural Stability ◽  
Center Of Pressure ◽  
Ground Reaction Forces ◽  
Bipedal Stance ◽  
Ballet Dancers ◽  
Maximum Range ◽  
Trajectory Length ◽  
Reaction Forces ◽  
Second Toe ◽  
Anterior Posterior

OBJECTIVES: Some forefoot shapes are ideal for pointe work in ballet. Egyptian-type, with the hallux being longest and the remaining toes decreasing in size, and Greek-type, with the second toe longer than the hallux, are considered less optimal for pointe work. Square-type, with the second toe the same length as the hallux, is considered optimal. This study compared postural stability in the bipedal stance, demi pointe, and en pointe between ballet dancers with the two toe types using a stabilometer. METHODS: This study included 25 Japanese ballet academy dancers who had received ballet lessons for at least 6 years. Toes were categorized into Egyptian-type (n=14) and square-type (n=11). Bipedal stance, demi pointe, and en pointe were tested. Center of pressure (COP) parameters were calculated from ground-reaction forces using two force plates: total trajectory length (LNG), velocities of anterior-posterior (VAP) and medial-lateral directions (VML), and maximum range displacement in the anterior-posterior (MAXAP) and medial-lateral directions (MAXML). Mann-Whitney U-tests were used to examine differences in COP parameters. RESULTS: There were no differences in parameters during bipedal stance or demi pointe. However, dancers with Egyptian-type toes had significantly greater LNG (p<0.01), VML (p=0.01), MAXML (p<0.01), and MAXAP (p=0.03) during en pointe. CONCLUSIONS: Ballet dancers with Egyptian-type toes demonstrated greater displacement in the medial-lateral and anterior-posterior directions during en pointe. Ballet dancers should be aware of toe types and sway character to optimize ballet training and balance.

scholarly journals Anterior-Posterior Ground Reaction Forces as a Measure of Paretic Leg Contribution in Hemiparetic Walking

Stroke ◽  
2006 ◽  
Vol 37 (3) ◽  
pp. 872-876 ◽  
Author(s):  
Mark G. Bowden ◽  
Chitralakshmi K. Balasubramanian ◽  
Richard R. Neptune ◽  
Steven A. Kautz
Keyword(s):  
Ground Reaction Forces ◽  
Reaction Forces ◽  
Anterior Posterior

scholarly journals How does external lateral stabilization constrain normal gait, apart from improving medio-lateral gait stability?

2020 ◽  
Author(s):  
Mohammadreza Mahaki ◽  
Trienke IJmker ◽  
Han Houdijk ◽  
Sjoerd Matthijs Bruijn
Keyword(s):  
Step Length ◽  
Step Width ◽  
Arm Swing ◽  
Gait Stability ◽  
Normal Gait ◽  
Consumption Data ◽  
Gait Features ◽  
Pelvis Rotation ◽  
Set Up ◽  
Anterior Posterior

AbstractBackgroundThe effect of external lateral stabilization on medio-lateral gait stability has been investigated previously. However, existing lateral stabilization devices not only constrains lateral motions, but also transverse and frontal pelvis rotations. This study aimed to investigate the effect of external lateral stabilization with and without constrained transverse pelvis rotation on mechanical and metabolic gait features.MethodsWe undertook 2 experiments with eleven and ten young adult subjects, respectively. Experiment 2 supplemented experiment 1, as it considered several potential confounding factors in the design and set-up of experiment 1. Kinematic, kinetic, and breath-by-breath oxygen consumption data were recorded during 3 walking conditions (normal walking (Normal), lateral stabilization with (Free) and without transverse pelvis rotation (Restricted)) and at 3 speeds (0.83, 1.25, and 1.66 m/s) for each condition.ResultsExternal lateral stabilization significantly reduced the amplitudes of the transverse and frontal pelvis rotations, medio-lateral pelvis displacement, transverse thorax rotation, arm swing, and step width. The amplitudes of free vertical moment, anterior-posterior and vertical pelvis displacements, step length, and energy cost were not significantly influenced by external lateral stabilization. The removal of transverse pelvis rotation restriction by our experimental set-up resulted in significantly higher transverse pelvis rotation, although it remained significantly less than Normal condition. In concert, concomitant gait features such as transverse thorax rotation and arm swing were not significantly influenced by our new set-up.ConclusionExisting lateral stabilization set-ups not only constrain medio-lateral motions (i.e. medio-lateral pelvis displacement), but also constrains other movements such as transverse and frontal pelvis rotations, which leads to several other gait changes such as reduced transverse thorax rotation, and arm swing. Our new setup allowed for more transverse pelvis rotation, however, this did not result in more normal pelvis rotation, arm swing, etc. Hence, to provide medio-lateral support without constraining other gait variables, more elaborate set-ups are needed. Unless such a set-up is realized the observed side effects need to be taken into account when interpreting the effects of lateral stabilization as reported in previous studies.

Vertical Impulse as a Determinant of Combination of Step Length and Frequency During Sprinting

2018 ◽  
Vol 39 (04) ◽  
pp. 282-290 ◽  
Author(s):  
Ryu Nagahara ◽  
Yohei Takai ◽  
Hiroaki Kanehisa ◽  
Tetsuo Fukunaga
Keyword(s):  
Step Length ◽  
Soccer Players ◽  
Ground Reaction Forces ◽  
Acceleration Phase ◽  
Mean Values ◽  
Reaction Forces ◽  
The Mean ◽  
Initial Acceleration ◽  
Braking Phase ◽  
Step Section

AbstractThis study aimed to clarify the influence of vertical impulse on the magnitude of step length (SL) and frequency (SF) and their ratio during the entire acceleration phase of maximal sprinting. Thirty-nine male soccer players performed 60-m sprints, during which step-to-step ground reaction forces were recorded over a 50-m distance. The mean values of spatiotemporal variables and vertical and anteroposterior impulses for each set of four steps during the acceleration phase until the 28th step were computed to examine relationships among variables in seven sections. When controlling for the influence of running speed, stature and corresponding duration of braking or propulsion, vertical impulses during the propulsive phase at the 1st–4th step section and those during the braking phases in the sections from the 5th–8th to the 25th–28th step were positively correlated with SL and SL/SF ratio and negatively correlated with SF, whereas the anteroposterior impulses were not correlated with SL or SF. In conclusion, the current results demonstrate that vertical impulse during the propulsive phase in the initial acceleration stage and that during the braking phase in the middle and later acceleration stages are the most likely determinants of the combination of SL and SF during sprinting.

Influence of Speed Variation and Age on Ground Reaction Forces and Stride Parameters of Children's Normal Gait

2005 ◽  
Vol 26 (8) ◽  
pp. 682-687 ◽  
Author(s):  
M. Diop ◽  
A. Rahmani ◽  
A. Belli ◽  
V. Gautheron ◽  
A. Geyssant ◽  
...  
Keyword(s):  
Ground Reaction Forces ◽  
Speed Variation ◽  
Normal Gait ◽  
Reaction Forces ◽  
Stride Parameters

scholarly journals Continuous Analysis of Running Mechanics by Means of an Integrated INS/GPS Device

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1480 ◽  
Author(s):  
Pavel Davidson ◽  
Heikki Virekunnas ◽  
Dharmendra Sharma ◽  
Robert Piché ◽  
Neil Cronin
Keyword(s):  
Pressure Measurement ◽  
Contact Time ◽  
Processing System ◽  
Time Estimation ◽  
Step Length ◽  
Optical Tracking ◽  
Machine Learning Techniques ◽  
Ground Reaction Forces ◽  
Start Time ◽  
Reaction Forces

This paper describes a single body-mounted sensor that integrates accelerometers, gyroscopes, compasses, barometers, a GPS receiver, and a methodology to process the data for biomechanical studies. The sensor and its data processing system can accurately compute the speed, acceleration, angular velocity, and angular orientation at an output rate of 400 Hz and has the ability to collect large volumes of ecologically-valid data. The system also segments steps and computes metrics for each step. We analyzed the sensitivity of these metrics to changing the start time of the gait cycle. Along with traditional metrics, such as cadence, speed, step length, and vertical oscillation, this system estimates ground contact time and ground reaction forces using machine learning techniques. This equipment is less expensive and cumbersome than the currently used alternatives: Optical tracking systems, in-shoe pressure measurement systems, and force plates. Another advantage, compared to existing methods, is that natural movement is not impeded at the expense of measurement accuracy. The proposed technology could be applied to different sports and activities, including walking, running, motion disorder diagnosis, and geriatric studies. In this paper, we present the results of tests in which the system performed real-time estimation of some parameters of walking and running which are relevant to biomechanical research. Contact time and ground reaction forces computed by the neural network were found to be as accurate as those obtained by an in-shoe pressure measurement system.

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