scholarly journals Clustering Golfers through Force Plate Analysis

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 63
Author(s):  
Jonathan Shepherd ◽  
Erik Henrikson ◽  
Scott Lynn ◽  
Paul Wood
Keyword(s):  
Force Plate ◽  
Force Production ◽  
Warm Up ◽  
Reaction Forces ◽  
Single Force ◽  
Ball Flight ◽  
Target Force ◽  
Plate Analysis ◽  
The Individual ◽  
Swing Speed

Golf is a sport which requires players to use ground interaction to generate clubhead speed in order to propel the ball towards the target. Force platforms are a technology which can be used to measure these ground reaction forces. Golfers generate force through a combination of jumping, sliding or twisting actions during the swing. Understanding how golfers generate these forces and if there are any groups which golfers could be clustered into could be used to enhance golf instruction as well as clubhead design or fitting practices for golf equipment. A total of 105 right-handed experienced golfers (handicap mean = 8.32 ± 8.31) consented to participate in the study of different swing speeds (31 below 95 mph, 41 over 105 mph and 33 between 95 and 105 mph). A calibrated single force plate was used for the test which sampled at 1000 Hz and recorded force and moment data in three axes. After a self-guided warm up, the players were instructed to hit five 7-iron shots and five drives to the best of their ability in an indoor hitting bay which used a launch monitor to record the club delivery and ball flight information. It was found that handicap or swing speed did not dictate the primary force production mechanism (sliding, jumping or twisting/spinning). This knowledge could aid engineers to design equipment better suited to the individual and help coaches build individualized programs to create power and clubhead speed in all players.

Dual versus single force plate analysis of human drop jumping

2021 ◽  
Author(s):  
Stian Langgård Jørgensen ◽  
Jens Bojsen‐Møller ◽  
Thue Skalgard ◽  
Henrik B Olsen ◽  
Per Aagaard
Keyword(s):  
Force Plate ◽  
Dual Versus ◽  
Single Force ◽  
Plate Analysis

Characteristics of Eight Irish Dance LandingsConsiderations for Training and Overuse Injury Prevention

2021 ◽  
Vol 25 (1) ◽  
pp. 30-37
Author(s):  
Sarah Klopp Christensen ◽  
Aaron Wayne Johnson ◽  
Natalie Van Wagoner ◽  
Taryn E. Corey ◽  
Matthew S. McClung ◽  
...  
Keyword(s):  
Large Range ◽  
Force Plate ◽  
Three Dimensional ◽  
The Body ◽  
Peak Force ◽  
Warm Up ◽  
Dance Training ◽  
Rise Rate ◽  
Dance Movements ◽  
Reaction Forces

Irish dance has evolved in aesthetics that lead to greater physical demands on dancers' bodies. Irish dancers must land from difficult moves without letting their knees bend or heels touch the ground, causing large forces to be absorbed by the body. The majority of injuries incurred by Irish dancers are due to overuse (79.6%). The purpose of this study was to determine loads on the body of female Irish dancers, including peak force, rise rate of force, and impulse, in eight common Irish hard shoe and soft shoe dance movements. It was hypothesized that these movements would produce different ground reac- tion force (GRF) characteristics. Sixteen female Irish dancers were recruited from the three highest competitive levels. Each performed a warm-up, reviewed the eight movements, and then performed each movement three times on a force plate, four in soft shoes and four in hard shoes. Ground reaction forces were measured using a three-dimensional force plate recording at 1,000 Hz. Peak force, rise rate, and vertical impulse were calculated. Peak forces normalized by each dancer's body weight for each of these variables were significantly different between move- ments and shoe types [F(15, 15)= 65.4, p < 0.01; F(15, 15) = 65.0, p < 0.01; and F(15, 15) = 67.4, p < 0.01, respectively]. The variable years of experience was not correlated with peak force, rise rate, or impulse (p > 0.40). It is concluded that there was a large range in GRF characteristics among the eight movements studied. Understanding the force of each dance step will allow instructors to develop training routines that help dancers adapt gradually to the high forces experienced in Irish dance training and competitions, thereby limiting the potential for overuse injuries.

GROUND REACTION FORCES OF COMMONLY USED VOLLEYBALL BLOCKING APPROACHES

2020 ◽  
Vol 30 (89) ◽  
pp. 13-20
Author(s):  
Dimitrije Cabarkapa ◽  
Andrew Fry ◽  
Damjana Cabarkapa ◽  
Arden Rogers ◽  
Eric Mosier
Keyword(s):  
Vertical Jump ◽  
Force Plate ◽  
Ground Reaction Forces ◽  
Strength And Conditioning ◽  
Advanced Level ◽  
Warm Up ◽  
Concentric Force ◽  
Vertical Jump Height ◽  
Reaction Forces ◽  
The Right

Aim: The purpose of this study was to quantify ground reaction forces for some of the most commonly utilised volleyball blocking approaches and to examine their kinetic and kinematic characteristics. Basic procedures: The study was comprised of 18 healthy recreationally active women who volunteered to participate. Immediately after completion of the warm-up protocol, subjects performed 5 blocking approaches: stationary blocking approach (SBA), shuffle block to the right (SHBR), shuffle block to the left (SHBL), swing block to the right (SWBR) and swing block to the left (SWBL). In order to allow adequate recovery, each trial was randomly assigned and separated by a 1-2 minute rest interval. A uni-axial force plate with data acquisition system sampling at 1000 Hz was used to measure ground reaction forces. Main findings: SWBR and SWBL unveiled the greatest peak concentric force and rate of force development when compared to SBA, while no difference was observed when compared to SHBR and SHBL. Results: No significant differences were observed in peak landing force, impulse, and vertical jump height between any of the blocking approaches examined in this study. Conclusions: Knowing biomechanical characteristics of some of the most commonly utilised volleyball blocking approaches may help athletes to appropriately respond and quickly adjust to the opponent’s attacking position. Kinetic and kinematic variables are likely to be augmented with an advanced level of competition and can be trained and improved by properly designed and implemented strength and conditioning programmes.

Long-term Results of Conservative Treatment, Excision Arthroplasty and Triple Pelvic Osteotomy for the Treatment of Hip Dysplasia in the Immature Dog

1997 ◽  
Vol 10 (03) ◽  
pp. 130-135 ◽  
Author(s):  
J. Dupuis ◽  
G. Beauregard ◽  
N. H. Bonneau ◽  
L. Breton ◽  
J. Planté
Keyword(s):  
Conservative Treatment ◽  
Force Plate ◽  
Pelvic Osteotomy ◽  
Control Group ◽  
Propulsive Force ◽  
Hind Limbs ◽  
Reaction Forces ◽  
Plate Analysis ◽  
The One ◽  
Excision Arthroplasty

SummaryThe long-term efficiency of conservative treatment, excision arthroplasty of the femoral head and neck and triple pelvic osteotomy for the treatment of hip dysplasia in the immature dog were compared using ground reaction forces analysis at the trot. Fourteen hips were re-evaluated for the conservative treatment group, 16 for the triple pelvic osteotomy group and ten for the excision arthroplasty group. Force plate analysis demonstrated that hind limbs belonging to the triple pelvic osteotomy group had, at the trot, a locomotor function similar to the one of normal hind limbs in the control group. At a “similar age”, hind limbs of the conservative group did not show any marked difference from those in the triple pelvic osteotomy and control groups. The dogs of the excision arthroplasty group showed ground reaction forces abnormalities, most probably due to the absence of a coxofemoral joint (decreased peak propulsive force and Fz impulse, compared to triple pelvic osteotomy and control groups). The forelimbs of conservative treatment, excision arthroplasty and triple pelvic osteotomy groups showed a peak propulsive force superior to the one in the control group. This could be an adaptation phenomenon in order to compensate a deficient function of the hind limbs or a habit acquired at a younger age.Force plate analysis has demonstrated that hind limbs treated bilaterally with triple pelvic osteotomy had, at the trot, a locomotor function similar to the one of normal hind limbs from a control group. At a mean age of 4.5 ± 1 years, dogs treated conservatively did not show, at the trot, any marked difference with those treated with triple pelvic osteotomy and with normal dogs. Hind limbs treated with excision arthroplasty showed certain abnormalities most probably due to the absence of a coxofemoral joint such as a significant decrease of peak propulsive force and Fz impulse.

scholarly journals Outcome after Modified Maquet Procedure in dogs with unilateral cranial cruciate ligament rupture: Evaluation of recovery limb function by use of force plate gait analysis

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256011
Author(s):  
Giovanni Della Valle ◽  
Chiara Caterino ◽  
Federica Aragosa ◽  
Fabiana Micieli ◽  
Dario Costanza ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Cruciate Ligament ◽  
Force Plate ◽  
Ground Reaction Forces ◽  
Cranial Cruciate Ligament ◽  
Ligament Rupture ◽  
Cruciate Ligament Rupture ◽  
Reaction Forces ◽  
Plate Analysis ◽  
Cranial Cruciate Ligament Rupture

Introduction Cranial cruciate ligament failure is one of the principal causes of canine lameness. Several surgical procedures were proposed to achieve joint stabilisation; among these, the Modified Maquet Procedure involves using a titanium foam wedge to achieve and maintain the tibial tuberosity advancement. The force-plate analysis provides to objectively assess normal and abnormal gait and the outcome of different surgical techniques. The study evaluates the outcome of limbs that underwent Modified Maquet Procedure using land-force plate analysis comparing the operated limb with its healthy contralateral one as a control. Materials and methods Thirty-five dogs with unilateral cranial cruciate ligament rupture were evaluated. Outcome after surgery was assessed by orthopaedic and radiographic evaluations and force plate gait analysis performed before surgery, at 15, 30 and 90 days after surgery. For objective comparison of ground reaction forces, data of operated limb were compared to contralateral limb on each time control and Symmetry Index at 90 days was determined. Healing radiographic signs, minor and major complication were reported. Results A significant improvement in ground reaction forces was reached in all the treated limbs between set time intervals. The median percentage increase in ground reaction forces was constant from 15 to 90 days, with a Symmetry Index >9 in 54.2% of patients suggesting a normal gait symmetry. A complete bone healing was noticed at 90 days follow-up radiographic assessment. We experienced three major (8.5%) and one minor (2.8%) complications. Conclusions To the Authors’ knowledge, this is the first study in the veterinary literature that assessed outcomes of dogs undergoing Modified Maquet Procedure for the treatment of cranial cruciate ligament rupture using force plate gait analysis and healthy contralateral limb as a control group. Our results confirm that Modified Maquet Procedure is an effective method to stabilise the stifle joint.

GROUND REACTION FORCE ANALYSIS FOR ASSESSING THE DIFFERENCES BETWEEN NORMAL AND WADDLING GAIT PATTERNS

2013 ◽  
Vol 25 (02) ◽  
pp. 1350024
Author(s):  
Mehdi Razeghi ◽  
Mostafa Rostami ◽  
Nima Jamshidi ◽  
Hamed Ghomashchi
Keyword(s):  
Muscular Dystrophy ◽  
Ground Reaction Force ◽  
Reaction Force ◽  
Force Plate ◽  
Case Series ◽  
Normal Subjects ◽  
Control Group ◽  
Reaction Forces ◽  
Force Components ◽  
Plate Analysis

Background: The purpose of this case series was to quantify gait to study muscular dystrophy. In this research, the quantitative differences between normal and waddling gaits were assessed by force plate analysis. Methods: Nineteen myopathy patients and 20 normal subjects serving as the control group participated in this research. In this study, quantitative analyses of gait have been used to investigate the differences in mobility between normal subjects and myopathy patients. Patient data were collected from Iranian Muscular Dystrophy Association members, and normal data were extracted from students of Azad University. All of the gait tests were performed using a Kistler force platform. Participants walked at a self-selected speed, barefoot, independently, and without assistive devices. Results: Our findings indicate that there were no significant differences between the patients and the control group in the anterior–posterior components of the ground reaction forces; however, there were considerable differences in the force components between the groups in the medial-lateral and vertical directions of the ground reaction force. In addition, there were significant differences in the time parameters between the groups along the vertical and medial-lateral directions.

Force plate analyses before and after surgical treatment of unilateral fragmented coronoid process

2000 ◽  
Vol 13 (03) ◽  
pp. 135-140 ◽  
Author(s):  
H. A. W. Hazewinkel ◽  
W. E. van den Brom ◽  
L. F. H. Theyse
Keyword(s):  
Surgical Treatment ◽  
Force Plate ◽  
Contralateral Side ◽  
Coronoid Process ◽  
Vertical Force ◽  
Normal Range ◽  
Radiological Progression ◽  
Before And After ◽  
Reaction Forces ◽  
Plate Analysis

SummaryIn this prospective study force plate analysis was used to investigate the locomotor aspects of unilateral fragmented medial coronoid process (FCP) and the effects of surgical treatment in seven dogs. The diagnosis unilateral FCP. was based on clinical and radiological examination of both elbow joints and confirmed during surgery. Radiological screening of the elbow joints was repeated at six months after surgery to determine the osteoarthritis (OA) score and to exclude any bilateral involvement. Force plate analyses were performed at three consecutive intervals: prior to surgery, at six weeks and at six months after surgery. The peak braking force Fymax, peak propulsive force-Fymin, peak vertical force-Fzmax and the corresponding impulses Iymax, Iymin and Iz were determined. The symmetry index SI of these forces and impulses (ratio affected side : contralateral side) in the front limbs was assessed to evaluate the locomotion. The combination of the Sis of Fymin, Fymax, Iymin, Iymax and Iz proved to be more sensitive in determining front limb lameness due to unilateral FCP than the SI of the peak vertical force Fzmax. The SI of Fzmax had returned to within the normal range at six months after surgery for all seven dogs, whereas the other parameters showed persisting abnormalities in two dogs. In this study the improvement after surgical treatment of the SI of both Fymin and Iymin was significant at P<0.05. All of the joints showed progressive radiological signs of OA at six months after surgery.The effects of unilateral fragmented medial coronoid process on the ground reaction forces of the front limbs and the effects of surgical treatment were evaluated using force plate analysis. Surgical treatment seemed to have a favorable outcome, despite radiological progression of osteoarthritis.

scholarly journals Motor control hierarchy in joint action that involves bimanual force production

2015 ◽  
Vol 113 (10) ◽  
pp. 3736-3743 ◽  
Author(s):  
Junya Masumoto ◽  
Nobuyuki Inui
Keyword(s):  
Motor Control ◽  
Joint Action ◽  
Control Level ◽  
Force Production ◽  
Production Task ◽  
Bimanual Action ◽  
Target Force ◽  
The Individual ◽  
Complementary Strategy ◽  
Force Production Task

The concept of hierarchical motor control has been viewed as a means of progressively decreasing the number of variables manipulated by each higher control level. We tested the hypothesis that turning an individual bimanual force-production task into a joint (two-participant) force-production task would lead to positive correlation between forces produced by the two hands of the individual participant (symmetric strategy) to enable negative correlation between forces produced by two participants (complementary strategy). The present study consisted of individual and joint tasks that involved both unimanual and bimanual conditions. In the joint task, 10 pairs of participants produced periodic isometric forces, such that the sum of forces that they produced matched a target force cycling between 5% and 10% of maximum voluntary contraction at 1 Hz. In the individual task, individuals attempted to match the same target force. In the joint bimanual condition, the two hands of each participant adopted a symmetric strategy of force, whereas the two participants adopted a complementary strategy of force, highlighting that the bimanual action behaved as a low level of a hierarchy, whereas the joint action behaved as an upper level. The complementary force production was greater interpersonally than intrapersonally. However, whereas the coherence was highest at 1 Hz in all conditions, the frequency synchrony was stronger intrapersonally than interpersonally. Moreover, whereas the bimanual action exhibited a smaller error and variability of force than the unimanual action, the joint action exhibited a less-variable interval and force than the individual action.

Modification of the contact area of a standard force platform and runway for small breed dogs

2014 ◽  
Vol 27 (04) ◽  
pp. 257-262 ◽  
Author(s):  
J. Y. W. Kim ◽  
T. C. Garcia-Nolan ◽  
S. Y. Kim ◽  
K. Hayashi ◽  
P. L. Hitchens ◽  
...  
Keyword(s):  
Reaction Force ◽  
Force Plate ◽  
Force Platform ◽  
Standard Size ◽  
Plate Size ◽  
Propulsion Force ◽  
In Series ◽  
Reaction Forces ◽  
Wood Frame ◽  
Clinically Significant

SummaryObjectives: To develop a platform that used standard size force plates for large breed dogs to capture ground reaction force data from any size dog.Methods: A walkway platform was constructed to accommodate two force plates (60 cm x 40 cm) positioned in series to a variety of smaller sizes. It was constructed from a custom wood frame with thick aluminium sheet force plate covers that prevented transfer of load to the force plate, except for rectangular windows of three different dimensions. A friction study was performed to ensure plates did not translate relative to one another during gait trials. A prospective, observational, single crossover study design was used to compare the effect of force platform configuration (full plate size [original plate], half plate size [modified plate]) on ground reaction forces using eight adult healthy Labrador Retriever dogs.Results: Slippage of the steel plate on the force plate did not occur. Peak propulsion force was the only kinetic variable statistically different between the full size and half sized platforms. There were no clinically significant differences between the full and half force platforms for the variables and dogs studied.Discussion and conclusion: The modified force platform allows the original 60 x 40 cm force plate to be adjusted effectively to a 30 x 40 cm, 20 x 40 cm and 15 x 40 cm sized plate with no clinically significant change in kinetic variables. This modification that worked for large breed dogs will potentially allow kinetic analysis of a large variety of dogs with different stride lengths.

Sign in / Sign up

Export Citation Format

Share Document