Changes in ground reaction force during jump landing in subjects with functional instability of the ankle joint

2004 ◽  
Vol 19 (6) ◽  
pp. 617-621 ◽  
Author(s):  
Brian Caulfield ◽  
Mary Garrett
Keyword(s):  
Ankle Joint ◽  
Ground Reaction Force ◽  
Reaction Force ◽  
Functional Instability ◽  
Jump Landing

The Effects of Sprinting Induced Fatigue on Ground Reaction Force Symmetry in Jump Landing Kinetics

2006 ◽  
Vol 38 (Supplement) ◽  
pp. S400
Author(s):  
Mindy Bennett ◽  
Kathy Berg ◽  
Chad Harris ◽  
Kristof Kipp ◽  
Mark DeBeliso ◽  
...  
Keyword(s):  
Ground Reaction Force ◽  
Reaction Force ◽  
Jump Landing

Patellar Tendon Straps Decrease Pain and May Alter Lower Extremity Kinetics in Those With Patellar Tendinopathy During Jump Landing

2017 ◽  
Vol 22 (4) ◽  
pp. 51-57 ◽  
Author(s):  
Adam B. Rosen ◽  
Jupil Ko ◽  
Kathy J. Simpson ◽  
Cathleen N. Brown
Keyword(s):  
Lower Extremity ◽  
Patellar Tendon ◽  
Ground Reaction Force ◽  
Reaction Force ◽  
Patellar Tendinopathy ◽  
Jump Landing ◽  
Drop Jumps ◽  
Kinetics Of

Patellar tendinopathy is often managed with a patellar tendon strap, however, their effectiveness is unsubstantiated. The purpose of this study was to determine if straps altered pain or lower extremity kinetics of individuals with patellar tendinopathy during landing. Thirty participants with patellar tendinopathy and 30 controls completed drop jumps with and without patellar tendon straps. Wearing the strap, tendinopathy participants demonstrated significantly decreased pain and reduced knee adductor moment; all participants displayed significantly decreased anterior ground reaction force while wearing a strap. Patellar tendon strapping may reduce pain due to alterations in direction and magnitude of loading.

scholarly journals Correlations between Pre-landing Sagittal Plane Kinematics and Posterior Ground Reaction Force during Single-leg Anterior Jump-landing

2017 ◽  
Vol 32 (6) ◽  
pp. 751-755
Author(s):  
Shunsuke OHJI ◽  
Junya AIZAWA ◽  
Kenji HIROHATA ◽  
Takehiro OHMI ◽  
Kazuyoshi YAGISHITA
Keyword(s):  
Ground Reaction Force ◽  
Sagittal Plane ◽  
Reaction Force ◽  
Jump Landing

Altered Ankle-Muscle Activation during Jump Landing in Participants with Functional Instability of the Ankle Joint

2004 ◽  
Vol 13 (3) ◽  
pp. 189-200 ◽  
Author(s):  
Brian Caulfield ◽  
Tara Crammond ◽  
Angela O’Sullivan ◽  
Susan Reynolds ◽  
Tomas Ward
Keyword(s):  
Ankle Joint ◽  
Outcome Measures ◽  
Muscle Activation ◽  
Control Group ◽  
Dynamic Activity ◽  
Cross Sectional ◽  
Functional Instability ◽  
Jump Landing ◽  
Ankle Muscle ◽  
Post Impact

Context:Identification of motor control deficit associated with Functional Instability (FI) of the ankle joint.Objective:T o compare patterns of ankle muscle activation during jump landing in participants with FI and a control group.Design:Cross-sectional comparison.Setting:Research laboratory.Participants:Twelve participants with FI (6 m, 6 f; age, 26.4 ± 4.6 years) and 10 control subjects (5 m, 5 f; age 24.9 ± 2.5 years).Main Outcome Measures:Integrated electromyographic (IEMG) activity of ankle musculature in the 150-millisecond period immediately prior to and post impact during 2 different jump landing activities.Results:Participants with FI demonstrated a significant reduction in pre-impact peroneus longus IEMG activity during both jumping activities compared to controls (P< .05). There were no significant differences between the groups’ soleus or tibialis anterior IEMG activity during the pre- or post-impact periods.Conclusions:These results help to further our understanding of changes in control of ankle movement during dynamic activity in participants with FI.

scholarly journals Different Modes of Feedback and Peak Vertical Ground Reaction Force During Jump Landing: A Systematic Review

2013 ◽  
Vol 48 (5) ◽  
pp. 685-695 ◽  
Author(s):  
Hayley M. Ericksen ◽  
Phillip A. Gribble ◽  
Kate R. Pfile ◽  
Brian G. Pietrosimone
Keyword(s):  
Beneficial Effect ◽  
Ground Reaction Force ◽  
Injury Risk ◽  
Data Extraction ◽  
Reaction Force ◽  
Final Analysis ◽  
Vertical Ground Reaction Force ◽  
Lower Extremity Injuries ◽  
Jump Landing ◽  
Standardized Effect Sizes

Context: Excessive ground reaction force when landing from a jump may result in lower extremity injuries. It is important to better understand how feedback can influence ground reaction force (GRF) and potentially reduce injury risk. Objective: To determine the effect of expert-provided (EP), self-analysis (SA), and combination EP and SA (combo) feedback on reducing peak vertical GRF during a jump-landing task. Data Sources: We searched the Web of Science database on July 1, 2011; using the search terms ground reaction force, landing biomechanics, and feedback elicited 731 initial hits. Study Selection: Of the 731 initial hits, our final analysis included 7 studies that incorporated 32 separate data comparisons. Data Extraction: Standardized effect sizes and 95% confidence intervals (CIs) were calculated between pretest and posttest scores for each feedback condition. Data Synthesis: We found a homogeneous beneficial effect for combo feedback, indicating a reduction in GRF with no CIs crossing zero. We also found a homogeneous beneficial effect for EP feedback, but the CIs from 4 of the 10 data comparisons crossed zero. The SA feedback showed strong, definitive effects when the intervention included a videotape SA, with no CIs crossing zero. Conclusions: Of the 7 studies reviewed, combo feedback seemed to produce the greatest decrease in peak vertical GRF during a jump-landing task.

Changes in Gait Characteristics due to Outsole Structure of Shoe

2015 ◽  
Vol 775 ◽  
pp. 28-33 ◽  
Author(s):  
Jin Seung Choi ◽  
Dong Won Kang ◽  
Jeong Woo Seo ◽  
Ju Young Kim ◽  
Seung Tae Yang ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Ankle Joint ◽  
Ground Reaction Force ◽  
Loading Rate ◽  
Center Of Pressure ◽  
Center Of Mass ◽  
Reaction Force ◽  
Long Term Effects ◽  
Vertical Ground Reaction Force ◽  
Gait Characteristics

The purpose of this study was to evaluate changes in kinematic and kinetic gait characteristics due to outsole structure of the shoe. In this experiment, cushioning shoe having cushion for heel (BOSS Corps., Korea) which is designed as a lever, MBT having an unstable rounded shoe (Masai Barefoot Technology, MBT, Swiss) and normal running shoe (Adidas, Germany) were compared. The experiment was performed walking on the straight walkway (10m x 3m) five times with preferred walking speed. 3D motion capture system was used to acquire kinematic and kinetic data using six infrared cameras and two force plates. For comparison among shoes, walking velocity, hip, knee and ankle joint angles (range of motion, trajectory), ground reaction force (loading rate, the decay rate, maximal vertical ground reaction force), and center of mass - center of pressure inclination angle (COM-COP angle) were used. The results showed that there were different effects of types of shoe on lower extremities. Joint angle trajectory of ankle, joint range of motion (ROM) of the hip, and peak force were significantly different among shoe types. MBT provided a decreased impact force. Cushioning shoe provided increased progressive force, decreased loading rate, and decreased COM-COP angle. For further study, it is necessary to analyze additional subjects (i.e., elderly) and long-term effects.

COMPARISON OF ANKLE JOINT LOAD IN DIFFERENT FOOT STRIKE STRATEGIES DURING STAIR ASCENT

2019 ◽  
Vol 19 (07) ◽  
pp. 1940043
Author(s):  
EUI BUM CHOI ◽  
HYEONG MIN JEON ◽  
JAE HOON HEO ◽  
GWANG MOON EOM
Keyword(s):  
Ankle Joint ◽  
Ground Reaction Force ◽  
Center Of Pressure ◽  
Reaction Force ◽  
Moment Arm ◽  
Joint Reaction Force ◽  
Stair Ascent ◽  
Foot Strike ◽  
Joint Load ◽  
Weight Acceptance

The purpose of this study was to find a foot strike strategy that can reduce the ankle joint load during stair ascent by comparing the ankle joint load in two strategies of initial contact during stair ascent. Twenty young subjects performed ascending stairs with two strategies, i.e., rearfoot strike (RFS) and forefoot strike (FFS). Kinematic data was measured from 12 cameras and the ground reaction force was measured by a force plate inserted in the second step of four-step stairs. Stance phase was divided into three phase, i.e., weight acceptance, pull up, and forward continuance. Four ankle related kinetic variables were derived from the measured data, i.e., joint reaction force, moment, and the magnitude and moment arm of ground reaction force. Root-mean-square (RMS) was used as the representative value of the variables during each phase was compared between strategies. In the weight acceptance phase, FFS resulted in greater values of all four kinetic variables than RFS. For the pull-up and forward continuance phases, joint reaction force and ground reaction force were not different between strategies but joint moment and moment arm was greater for FFS than RFS. In weight acceptance phase, greater ground reaction forces and longer moment arm of FFS may have resulted from faster weight transfer to the ipsilateral foot and the more anterior location of center of pressure, respectively. Both have contributed greater joint moment of FFS. In pull-up and forward continuance phases, greater ankle moment of FFS was affected mainly by longer moment arms, which may reflect the persistent farther location of center of pressure from the ankle joint. The results suggest that RFS would be more advantageous than FFS in terms of ankle joint load.

Sign in / Sign up

Export Citation Format

Share Document