scholarly journals Hop-Stabilization Training and Landing Biomechanics in Athletes With Chronic Ankle Instability: A Randomized Controlled Trial

2019 ◽  
Vol 54 (12) ◽  
pp. 1296-1303 ◽  
Author(s):  
Mohammad Karimizadeh Ardakani ◽  
Erik A. Wikstrom ◽  
Hooman Minoonejad ◽  
Reza Rajabi ◽  
Ali Sharifnezhad
Keyword(s):  
Lower Extremity ◽  
Training Program ◽  
Ankle Instability ◽  
Control Group ◽  
Ground Reaction Forces ◽  
Basketball Players ◽  
Jump Landing ◽  
Randomized Controlled ◽  
Landing Biomechanics ◽  
Reaction Forces

Context Hopping exercises are recommended as a functional training tool to prevent lower limb injury, but their effects on lower extremity biomechanics in those with chronic ankle instability (CAI) are unclear. Objective To determine if jump-landing biomechanics change after a hop-stabilization intervention. Design Randomized controlled clinical trial. Setting Research laboratory. Patients or Other Participants Twenty-eight male collegiate basketball players with CAI were divided into 2 groups: hop-training group (age = 22.78 ± 3.09 years, mass = 82.59 ± 9.51 kg, height = 187.96 ± 7.93 cm) and control group (age = 22.57 ± 2.76 years, mass = 78.35 ± 7.02 kg, height = 185.69 ± 7.28 cm). Intervention(s) A 6-week supervised hop-stabilization training program that consisted of 18 training sessions. Main Outcome Measure(s) Lower extremity kinetics and kinematics during a jump-landing task and self-reported function were assessed before and after the 6-week training program. Results The hop-stabilization program resulted in improved self-reported function (P < .05), larger sagittal-plane hip- and knee-flexion angles, and greater ankle dorsiflexion (P < .05) relative to the control group. Reduced frontal-plane joint angles at the hip, knee, and ankle as well as decreased ground reaction forces and a longer time to peak ground reaction forces were observed in the hopping group compared with the control group after the intervention (P < .05). Conclusions The 6-week hop-stabilization training program altered jump-landing biomechanics in male collegiate basketball players with CAI. These results may provide a potential mechanistic explanation for improvements in patient-reported outcomes and reductions in injury risk after ankle-sprain rehabilitation programs that incorporate hop-stabilization exercises.

scholarly journals Ground Reaction Forces and Kinematics of Ski Jump Landing Using Wearable Sensors

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2011 ◽  
Author(s):  
Bessone ◽  
Petrat ◽  
Schwirtz
Keyword(s):  
Wearable Sensors ◽  
Reaction Force ◽  
Ground Reaction Forces ◽  
Inertial Motion ◽  
Jump Landing ◽  
The Past ◽  
Landing Biomechanics ◽  
Reaction Forces ◽  
The Hill ◽  
Kinematics And Kinetics

In the past, technological issues limited research focused on ski jump landing. Today, thanks to the development of wearable sensors, it is possible to analyze the biomechanics of athletes without interfering with their movements. The aims of this study were twofold. Firstly, the quantification of the kinetic magnitude during landing is performed using wireless force insoles while 22 athletes jumped during summer training on the hill. In the second part, the insoles were combined with inertial motion units (IMUs) to determine the possible correlation between kinematics and kinetics during landing. The maximal normal ground reaction force (GRFmax) ranged between 1.1 and 5.3 body weight per foot independently when landing using the telemark or parallel leg technique. The GRFmax and impulse were correlated with flying time (p < 0.001). The hip flexions/extensions and the knee and hip rotations of the telemark front leg correlated with GRFmax (r = 0.689, p = 0.040; r = −0.670, p = 0.048; r = 0.820, p = 0.007; respectively). The force insoles and their combination with IMUs resulted in promising setups to analyze landing biomechanics and to provide in-field feedback to the athletes, being quick to place and light, without limiting movement.

scholarly journals Characterization of Multiple Movement Strategies in Participants With Chronic Ankle Instability

2019 ◽  
Vol 54 (6) ◽  
pp. 698-707 ◽  
Author(s):  
J. Ty Hopkins ◽  
S. Jun Son ◽  
Hyunsoo Kim ◽  
Garritt Page ◽  
Matthew K. Seeley
Keyword(s):  
Sagittal Plane ◽  
Ankle Instability ◽  
Vertical Jump ◽  
Frontal Plane ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Ground Reaction Forces ◽  
Sensorimotor Deficits ◽  
Movement Strategies ◽  
Reaction Forces

Context Chronic ankle instability (CAI) is characterized by multiple sensorimotor deficits, affecting strength, postural control, motion, and movement. Identifying specific deficits is the key to developing appropriate interventions for this patient population; however, multiple movement strategies within this population may limit the ability to identify specific movement deficits. Objective To identify specific movement strategies in a large sample of participants with CAI and to characterize each strategy relative to a sample of uninjured control participants. Design Descriptive laboratory study. Setting Biomechanics laboratory. Patients or Other Participants A total of 200 individuals with CAI (104 men, 96 women; age = 22.3 ± 2.2 years, height = 174.2 ± 9.5 cm, mass = 72.0 ± 14.0 kg) were selected according to the inclusion criteria established by the International Ankle Consortium and were fit into clusters based on movement strategy. A total of 100 healthy individuals serving as controls (54 men, 46 women; age = 22.2 ± 3.0 years, height = 173.2 ± 9.2 cm, mass = 70.7 ± 13.4 kg) were compared with each cluster. Main Outcome Measure(s) Lower extremity joint biomechanics and ground reaction forces were collected during a maximal vertical jump landing, followed immediately by a side cut. Data were reduced to functional output or curves, kinematic data from the frontal and sagittal planes were reduced to a single representative curve for each plane, and representative curves were clustered using a Bayesian clustering technique. Estimated functions for each dependent variable were compared with estimated functions from the control group to describe each cluster. Results Six distinct clusters were identified from the frontal-plane and sagittal-plane data. Differences in joint angles, joint moments, and ground reaction forces between clusters and the control group were also identified. Conclusions The participants with CAI demonstrated 6 distinct movement strategies, indicating that CAI could be characterized by multiple distinct movement alterations. Clinicians should carefully evaluate patients with CAI for sensorimotor deficits and quality of movement to determine the appropriate interventions for treatment.

scholarly journals A 3-Month Jump-Landing Training Program: A Feasibility Study Using the RE-AIM Framework

2013 ◽  
Vol 48 (3) ◽  
pp. 296-305 ◽  
Author(s):  
Inne Aerts ◽  
Elke Cumps ◽  
Evert Verhagen ◽  
Niels Mathieu ◽  
Sander Van Schuerbeeck ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Training Program ◽  
Intervention Program ◽  
Controlled Trial ◽  
Intervention Group ◽  
Participation Rate ◽  
Incidence Density ◽  
Control Group ◽  
Injury Incidence ◽  
Jump Landing

Context: Evaluating the translatability and feasibility of an intervention program has become as important as determining the effectiveness of the intervention. Objective: To evaluate the applicability of a 3-month jump-landing training program in basketball players, using the RE-AIM (reach, effectiveness, adoption, implementation, and maintenance) framework. Design: Randomized controlled trial. Setting: National and regional basketball teams. Patients or Other Participants: Twenty-four teams of the second highest national division and regional basketball divisions in Flanders, Belgium, were randomly assigned (1:1) to a control group and intervention group. A total of 243 athletes (control group = 129, intervention group = 114), ages 15 to 41 years, volunteered. Intervention(s): All exercises in the intervention program followed a progressive development, emphasizing lower extremity alignment during jump-landing activities. Main Outcome Measure(s): The results of the process evaluation of the intervention program were based on the 5 dimensions of the RE-AIM framework. The injury incidence density, hazard ratios, and 95% confidence intervals were determined. Results: The participation rate of the total sample was 100% (reach). The hazard ratio was different between the intervention group and the control group (0.40 [95% confidence interval = 0.16, 0.99]; effectiveness). Of the 12 teams in the intervention group, 8 teams (66.7%) agreed to participate in the study (adoption). Eight of the participating coaches (66.7%) felt positively about the intervention program and stated that they had implemented the training sessions of the program as intended (implementation). All coaches except 1 (87.5%) intended to continue the intervention program the next season (maintenance). Conclusions: Compliance of the coaches in this coach-supervised jump-landing training program was high. In addition, the program was effective in preventing lower extremity injuries.

EFFECTIVENESS OF FLOOR MARKINGS FOR CONTROLLING CUT WIDTH DURING SIDE CUTTING TASKS IN LABORATORY EXPERIMENTS

2020 ◽  
Vol 20 (01) ◽  
pp. 1950076
Author(s):  
JING WEN PAN ◽  
THORSTEN STERZING ◽  
JUN WEI PANG ◽  
YAOHUI KELVIN CHUA ◽  
PUI WAH KONG
Keyword(s):  
Lower Extremity ◽  
Hip Joint ◽  
Laboratory Experiments ◽  
Ground Reaction Forces ◽  
Basketball Players ◽  
Foot Placement ◽  
Body Postures ◽  
Motion Data ◽  
Reaction Forces ◽  
The Difference

This study examined the effectiveness of floor markings for controlling cut width during the analysis of side cutting maneuvers. Eleven male basketball players performed two side cutting maneuvers of narrow (30[Formula: see text]cm) and wide (45[Formula: see text]cm) cut widths and were guided by floor markings. Ground reaction forces, together with ankle, knee, and hip joint ranges of motion (ROM), and respective joint moments were determined. Cut widths were verified by two approaches by calculating the actual foot-to-foot and foot-to-pelvis distances from motion data. Biomechanical lower extremity loading showed no significant differences in most kinetic and kinematic variables between narrow and wide cuts. The difference in foot-to-foot distance (15.1 [11.6, 18.7] cm, [Formula: see text] between conditions corresponded well with floor markings, however, the difference in foot-to-pelvis distance was much smaller (2.3 [0.3, 4.4] cm, [Formula: see text]. It is concluded that floor markings are not sufficient for controlling the actual anatomical cut width in laboratory experiments. Participants may adjust their body postures to maintain similar lower extremity loading when performing side cuts differing in foot placement width. Cut width should be represented by foot-to-pelvis distance and not foot-to-foot distance.

Hop Stabilization Training Improves Neuromuscular Control in College Basketball Players With Chronic Ankle Instability: A Randomized Controlled Trial

2019 ◽  
Vol 28 (6) ◽  
pp. 576-583 ◽  
Author(s):  
Hooman Minoonejad ◽  
Mohammad Karimizadeh Ardakani ◽  
Reza Rajabi ◽  
Erik A. Wikstrom ◽  
Ali Sharifnezhad
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Ankle Instability ◽  
Controlled Trial ◽  
Onset Time ◽  
Neuromuscular Control ◽  
Control Group ◽  
Basketball Players ◽  
College Basketball ◽  
Experimental Group

Context: Neuromuscular control deficit has been reported in people with chronic ankle instability (CAI) and hopping exercises have been recommended as a functional training tool to prevent lower limb injury, but its effects on lower-extremity neuromuscular control in those with CAI are unclear. Objective: To investigate the effect of hop stabilization training on neuromuscular control and self-reported function in college basketball players with CAI. Study Design: A randomized controlled trial. Setting: Research Laboratory. Patients (or Other Participants): A total of 28 college basketball players with CAI were randomly assigned to the experimental hop stabilization group (age = 22.78 [3.09] y, weight = 82.59 [9.51] kg, and height = 187.96 [7.93] cm) or the control group (age = 22.57 [2.76] y, weight = 78.35 [7.02] kg, and height = 185.69 [7.28] cm). Intervention: Participants in the experimental group performed supervised hop stabilization exercises 3 times per week for 6 weeks. The control group received no intervention. Main Outcome Measures: Preparatory and reactive muscle activation levels and muscle onset time were assessed from 8 lower-extremity muscles during a jump-landing task before and after the 6-week training program. Results: Significant improvements in preparatory muscle activation, reactive muscle activation, and muscle onset time were noted across the lower-extremity in the experimental group relative to the control group (P < .05). Self-reported function also improved in the experimental group relative to the control group (P < .05). Conclusions: These findings demonstrate that 6 weeks of hop stabilization training is effective in improving neuromuscular control and self-reported function in college basketball players with CAI. Hop stabilization exercises can be incorporated into the rehabilitation program for CAI.

Bilateral Changes in Ground Reaction Forces in Patients with Unilateral Anterior Cruciate Ligament Deficiency During Stair Locomotion

2011 ◽  
Vol 27 (3) ◽  
pp. 437-445 ◽  
Author(s):  
H.-C. Lin ◽  
H.-C. Hsu ◽  
T.-W. Lu
Keyword(s):  
Cruciate Ligament ◽  
Ground Level ◽  
Rehabilitation Program ◽  
Lower Limbs ◽  
Control Group ◽  
Ground Reaction Forces ◽  
Acl Deficiency ◽  
Stair Ascent ◽  
Reaction Forces ◽  
Stair Locomotion

ABSTRACTStair locomotion is an important but challenging functional activity for people with lower limb pathology. This study aimed to investigate the bilateral changes in force-bearing on lower limbs during stair locomotion in patients with unilateral ACL deficiency. The ground reaction forces (GRF) were collected from three force platforms: One at ground level in front of a 5-step stair and two on the first two steps respectively. Parameters in vertical and anterior-posterior GRF were extracted and compared between the ACL-deficient (ACLD) and control groups. The ACLD group showed significantly slower stepping cadences in both stair ascent and stepping down to the ground (p < 0.05). The vertical GRF in the ACLD group demonstrated smaller peak forces but larger minimum forces between the two peaks than those in the control group during both stair ascent and descent. Significantly reduced anterior propulsive forces and push-off rates in the late stance were also found in both limbs of the ACLD group (p < 0.05). The slower cadences and reduced force-bearing on the affected limb suggested a protective strategy was adopted. However, the anterior loading parameters in the early stance on the unaffected limb demonstrated different adaptations with significantly larger magnitudes during stair ascent but reduced magnitudes during stair descent (p < 0.05). Similar results were also found in the weight- transferring strategies between legs in consecutive steps with a significantly larger percentage of lift-up forces but a smaller percentage of impact forces on the leading unaffected limb. The results of this study indicated a cautious force-bearing strategy and bilateral adaptation were apparent in the patients with unilateral ACL deficiency. This information may provide a safety guideline for the patients and be helpful for a better use of the stair tasks as part of a rehabilitation program.

Self-Managed Music-Guided Exercise Intervention Improved Upper and Lower Extremity Muscle Strength for ICU Survivors—A Pilot Randomized Controlled Study

2021 ◽  
pp. 109980042110502
Author(s):  
Zhan Liang ◽  
Hilary Yip ◽  
Kimberly Sena Moore ◽  
Tanira Ferreira ◽  
Ming Ji ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Lower Extremity ◽  
Active Control ◽  
Exercise Intervention ◽  
Controlled Study ◽  
Control Group ◽  
Active Control Group ◽  
Randomized Controlled ◽  
Left And Right ◽  
The Mean

Objective The objective of this study was to evaluate effects of a self-managed music-guided exercise intervention on muscle strength among intensive care unit (ICU) survivors. Methods We used a two-arm randomized-controlled trial. Following ICU discharge, eligible participants were assigned to one of two groups: music group ( n = 13) or active control group ( n = 13). The music group was taught to self-manage upper and lower extremity exercise movements by listening to an individualized music-guided playlist twice daily for 5 days. The active control group was provided an exercise brochure and advised to perform the same exercises at the same intervals. Dynamometers were used to measure muscle strength. T-tests and Weighted GEE models were used for testing the intervention effect between groups. Results Twenty-six subjects were enrolled. The mean age was 62.8 ( SD = 13.8), 53.8% were male, 65.4% were Caucasian, and the mean APACHE severity of illness score was 59 ( SD = 23.4). Reasons for ICU admission were mainly cardiac and medical. The music group showed significant improvements in handgrip, plantar flexion, leg extension, elbow flexion, and shoulder adduction strengths on left and right sides. Additionally, left and right leg extensor and left plantar flexor strengths showed significant post-differences, and small to moderately large effect sizes, between the music group and control group. Conclusion These findings suggest that a music-guided exercise intervention has the potential to improve muscle strength in ICU survivors and prevent further post-ICU deterioration in ICU survivors. Future trials should build upon these preliminary findings.

The effect of Baduanjin exercise for functional ankle instability rehabilitation: study protocol for a randomized controlled pilot trial

2019 ◽  
Author(s):  
Li Zhou ◽  
Juanjuan Ai ◽  
Kuangshi Li ◽  
Yiting Sun ◽  
Ruyu Yan ◽  
...  
Keyword(s):  
Physical Therapy ◽  
Ankle Instability ◽  
Controlled Trial ◽  
Pilot Trial ◽  
Bilateral Symmetry ◽  
Erector Spinae ◽  
Control Group ◽  
Joint Control ◽  
Functional Ankle Instability ◽  
Randomized Controlled

Abstract Background Patients with functional ankle instability (FAI) have problems with joint control, balance, gait, and postural symmetry. Baduanjin is a type of traditional Chinese exercise, which has been shown to be effective for treating many diseases and symptoms. However, the effect of Baduanjin in patients with FAI has not been proved. This trial is an assessor-blinded randomized controlled trial (RCT), its objective is to study the efficacy and safety of Baduanjin on the rehabilitation of patients with FAI. Methods Seventy-two participants, who are eligible according to the inclusion and exclusion criteria, will be randomized (in a 1:1 ratio) using a random numbers table into two groups: a Baduanjin group and a control group (subjected to conventional physical therapy). The Baduanjin group will be subjected to Baduanjin exercise in addition to the conventional physical therapy. The participants’ exercise will be implemented for 4 weeks (5 days a week). All the participants will be assessed at baseline, after 2 weeks’ treatment, and after 4 weeks’ treatment (after the intervention). The efficacy of Baduanjin will be assessed based on three types of outcome: (1) surface electromyography (sEMG) results of the bilateral erector spinae, tibialis anterior, and peroneus longus; (2) balance function under different conditions; and (3) the severity of ankle instability in daily life, using the Cumberland Ankle Instability Tool (CAIT). Discussion The aim of the trial is to study the effect and safety of Baduanjin in patients with FAI. The study findings may show whether Baduanjin could be used to complement medical FAI rehabilitation methods. The study findings could also highlight the importance of Baduanjin in promoting the bilateral symmetry of motor function.

Effects of arch-support orthoses on ground reaction forces and lower extremity kinematics related to running at various inclinations

2020 ◽  
Vol 38 (14) ◽  
pp. 1629-1634
Author(s):  
Wing-Kai Lam ◽  
Lok-Yee Pak ◽  
Charis King-Wai Wong ◽  
Mohammad Farhan Tan ◽  
Sang-Kyoon Park ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Ground Reaction Forces ◽  
Reaction Forces ◽  
Arch Support

scholarly journals Characteristics of Autocorrelation Structure of Lower Extremity Functional Laterality in Disturbed and Undisturbed Bipedal Upright Stance

2016 ◽  
Vol 17 (4) ◽  
Author(s):  
Jacek Stodółka ◽  
Weronika Stodółka ◽  
Jarosław Gambal ◽  
Tom Raunig
Keyword(s):  
Lower Extremity ◽  
Autocorrelation Function ◽  
Human Mobility ◽  
Time Frame ◽  
Standing Position ◽  
Ground Reaction Forces ◽  
Upright Stance ◽  
Functional Laterality ◽  
Eyes Open ◽  
Reaction Forces

AbstractPurpose. It is posited that functional laterality is influenced by the generation and conduction of neural signals and therefore associated with sensorimotor control. The question arises if symmetry or asymmetry in sensorimotor processing affects the development of symmetric or asymmetric motor programs in the lower extremities. The purpose of the study was to examine the mechanisms of the human mobility moto-control - the process of maintaining body balance in a standing position through an appropriate course of distribution of ground reaction forces in a time frame, in a situation requiring lower extremity movement symmetry. Methods. The autocorrelation function was calculated for ground reaction forces (in the three orthogonal axes) registered during 45 s of bipedal upright stance in two conditions (eyes open and closed). Results. Minor albeit significant deficiencies in postural muscle control were revealed as a function of time, as evidenced in the decay of the autocorrelation function to zero (T

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