scholarly journals EFFECTS OF WEARING AN ANKLE BRACE ON GROUND REACTION FORCES DURING JUMPS IN BASKETBALL GAME SIMULATION

2021 ◽  
Vol 27 (2) ◽  
pp. 218-224
Author(s):  
Alex Castro ◽  
Márcio Fagundes Goethel ◽  
Edgar Ramos Vieira ◽  
Pedro Vieira Sarmet Moreira ◽  
Antônio Francisco de Almeida Neto ◽  
...  
Keyword(s):  
Loading Rate ◽  
Reaction Force ◽  
The Body ◽  
Ankle Injuries ◽  
Exercise Protocol ◽  
Basketball Players ◽  
Level Of Evidence ◽  
Basketball Game ◽  
Ankle Brace ◽  
Vertical Jumps

ABSTRACT Introduction: The use of ankle braces reduces the risk of ankle injuries in basketball players. However, the mechanisms of injury protection provided by the ankle braces in the basketball game are still unknown. Objectives: To analyze the effects of wearing a lace-up ankle brace, and to conduct an exercise protocol that simulated the intensity of the basketball game on ground reaction force (GRF) during basketball-specific vertical jumps. Methods: Eleven male younger basketball players aged under 18 completed 48 vertical jumps, with and without ankle braces, during an exercise protocol composed of four 10-minute periods, simulating the activity profile and intensity of the basketball game as well as the typical intervals between periods. Mediolateral (variables: the greatest medial and lateral peaks) and vertical (variables: vertical peak, impulse peak, impulse at 50 ms of landing, loading rate and jump height) GRF were measured during takeoff and landing for all the jumps performed in the exercise protocol. Results: The use of the ankle brace reduced mediolateral GRF in all periods of the exercise protocol during takeoff and landing ( P < 0.05), without affecting the vertical GRF ( P > 0.05). Mediolateral and vertical GRF (takeoff mediolateral vertical peaks, landing mediolateral peaks, landing impulse peak, takeoff and landing loading rate) increased significantly during four subsequent 10-minute periods ( P < 0.05). However, for mediolateral GRF, the increase overtime was higher without braces. Conclusions: The use of the ankle brace reduced the mediolateral GRF on the lower limb, while there was a progressive increase in the external load applied to the body during the vertical jumps in the subsequent periods of the exercise protocol performed at the same intensity of the basketball game. Level of evidence I; Randomized clinical trial .

scholarly journals Ankle brace attenuates the medial-lateral ground reaction force during basketball rebound jump

2017 ◽  
Vol 23 (3) ◽  
pp. 232-236 ◽  
Author(s):  
Alex Castro ◽  
Márcio Fagundes Goethel ◽  
Arthur Fernandes Gáspari ◽  
Luciano Fernandes Crozara ◽  
Mauro Gonçalves
Keyword(s):  
Ground Reaction Force ◽  
Mechanical Stability ◽  
Reaction Force ◽  
Young Male ◽  
Ankle Injuries ◽  
Initial Contact ◽  
Dynamic Parameters ◽  
Basketball Players ◽  
Ankle Brace ◽  
The Impact

ABSTRACT Introduction: The jump landing is the leading cause for ankle injuries in basketball. It has been shown that the use of ankle brace is effective to prevent these injuries by increasing the mechanical stability of the ankle at the initial contact of the foot with the ground. Objective: To investigate the effects of ankle brace on the ground reaction force (GRF) during the simulation of a basketball rebound jump. Method: Eleven young male basketball players randomly carried out a simulated basketball rebound jump under two conditions, with and without ankle brace (lace-up). Dynamic parameters of vertical GRF (take-off and landing vertical peaks, time to take-off and landing vertical peaks, take-off impulse peak, impulse at 50 milliseconds of landing, and jump height) and medial-lateral (take-off and landing medial-lateral peaks, and time to reach medial-lateral peaks at take-off and landing) were recorded by force platform during rebound jumps in each tested condition. The comparisons between the tested conditions were performed by paired t test (P<0.05). Results: The use of ankle braces reduced the medial and lateral peaks of the GRF by -15.7% (P=0.035) and -24.9% (P=0.012), respectively, during the landing of the rebound jump. Additionally, wearing the brace did not affect any dynamic parameters of vertical GRF or temporal parameters of the medial-lateral GRF (P>0.05). Conclusion: The use of ankle brace during basketball rebound jumps attenuates the magnitude of medial-lateral GRF on the landing phase, without changing the vertical GRF. This finding indicates that the use of brace increases the medial-lateral mechanical protection by decreasing the shear force exerted on the athlete’s body without change the application of propulsive forces in the take-off and the impact absorption quality in the landing during the basketball rebound jump.

Association of Ankle Dorsiflexion and Landing Forces in Jumping Athletes

2021 ◽  
pp. 194173812110634
Author(s):  
Adalberto Felipe Martinez ◽  
Rodrigo Scattone Silva ◽  
Bruna Lopes Ferreira Paschoal ◽  
Laura Ledo Antunes Souza ◽  
Fábio Viadanna Serrão
Keyword(s):  
Patellar Tendon ◽  
Loading Rate ◽  
Reaction Force ◽  
Ankle Dorsiflexion ◽  
Patellar Tendinopathy ◽  
Plantar Flexor ◽  
Vertical Ground Reaction Force ◽  
Level Of Evidence ◽  
Ankle Kinematics ◽  
Tendon Force

Background: Dorsiflexion range of motion restriction has been associated with patellar tendinopathy, but the mechanisms of how dorsiflexion restriction could contribute to knee overload remain unknown. Hypothesis: Peak ankle dorsiflexion and ankle dorsiflexion excursion are negatively associated with peak vertical ground-reaction force (vGRF) and loading rate, and with peak patellar tendon force and loading rate, and positively associated with peak ankle plantar flexor moment. Study Design: Cross-sectional study. Level of Evidence: Level 4. Methods: Kinematic and kinetic data of 26 healthy recreational jumping athletes were measured during a single-leg drop vertical jump. Pearson’s correlation coefficients were calculated to establish the association between peak ankle dorsiflexion and ankle dorsiflexion excursion with peak vGRF and vGRF loading rate, with peak patellar tendon force and patellar tendon force loading rate, and with peak ankle plantar flexor moment. Results: Ankle dorsiflexion excursion negatively correlated with peak vGRF loading rate ( r = −0.49; P = 0.011) and positively correlated with peak ankle flexor plantar moment ( r = 0.52; P = 0.006). In addition, there was a positive correlation between peak ankle dorsiflexion and peak vGRF ( r = 0.39; P = 0.05). Conclusion: Ankle kinematics are associated with vGRF loading rate, ankle flexor plantar moment and peak vGRF influencing knee loads, but no association was observed between ankle kinematics and patellar tendon loads. Clinical Relevance: These results suggest that increasing ankle dorsiflexion excursion may be an important strategy to reduce lower limb loads during landings but should not be viewed as the main factor for reducing patellar tendon force.

scholarly journals Shoe Cushioning Effects on Foot Loading and Comfort Perception during Typical Basketball Maneuvers

2019 ◽  
Vol 9 (18) ◽  
pp. 3893 ◽  
Author(s):  
Xini Zhang ◽  
Zhen Luo ◽  
Xi Wang ◽  
Yang Yang ◽  
Jiaxin Niu ◽  
...  
Keyword(s):  
Plantar Pressure ◽  
Loading Rate ◽  
Reaction Force ◽  
Basketball Players ◽  
Pressure System ◽  
Significant Difference ◽  
Comfort Perception ◽  
Force Peak ◽  
Foot Loading ◽  
The Relationship

Purpose: This study aimed to explore the relationship between foot loading and comfort perception in two basketball shoes during basketball-specific maneuvers. Methods: Twelve male collegiate basketball players were required to complete three basketball maneuvers (i.e., side-step cutting, 90° L-direction running, and lay-up jumping) in two basketball shoe conditions (shoe L and shoe N, with different midsole cushioning types). Two Kistler force plates and a Medilogic insole plantar pressure system were used to collect kinetic data (i.e., impact force, peak loading rate, and plantar pressure variables). Perception scales were used to evaluate comfort perception. Results: No significant difference was observed between the two shoes during maneuvers in terms of ground reaction force. However, the plantar pressure of shoe L in the midfoot and lateral foot regions was significantly greater than that of shoe N during side-step cutting and lay-up jumping. Shoe N was significantly superior to shoe L, especially in dynamic scale in terms of the perception of comfort. The plantar pressure and perception characteristics in the two shoes were significantly different but inconsistent with each other. Conclusion: The biomechanical characteristics of the shoes themselves and the perception evaluation of the athletes should be considered in comprehensive shoe-cushioning design and evaluation.

scholarly journals Timing return-to-competition: a prospective registration of 45 different types of severe injuries in Germany’s highest football league

2021 ◽  
Author(s):  
Werner Krutsch ◽  
Clemens Memmel ◽  
Volker Alt ◽  
Volker Krutsch ◽  
Tobias Tröß ◽  
...  
Keyword(s):  
Epidemiological Data ◽  
The Body ◽  
Ankle Injuries ◽  
Severe Injury ◽  
Body Region ◽  
Professional Football ◽  
Level Of Evidence ◽  
Severe Injuries ◽  
Different Types ◽  
Return To Competition

Abstract Introduction Many professional football players sustain at least one severe injury over the course of their career. Because detailed epidemiological data on different severe injuries in professional football have been missing so far, this study describes the frequency and return-to-competition (RTC) periods of different types of severe football injuries. Material and methods This epidemiological investigation is a prospective standardised injury analysis based on national media longitudinal registration. Injuries were classified according to the consensus statement by Fuller et al. (2006). The analysis includes injuries sustained by players of the first German football league during the seasons 2014–2015 to 2017–2018. Level of evidence: II. Results Overall, 660 severe injuries were registered during the four seasons (mean 165 per season; 9.2 per season per team; incidence in 1000 h: 0.77). The body region most frequently affected by severe injury was the knee (30.0%; 49.5 injuries per season/SD 13.2) followed by the thigh (26.4%; 43.5 injuries/SD 4.2) and the ankle (16.7%; 27.5 injuries/SD 5.0). The distribution of injuries over the course of a season showed a trend for ACL ruptures to mainly occur at the beginning of a season (45.8%), overuse syndromes such as achillodynia (40.9%) and irritation of the knee (44.4%) during the winter months and severe muscle and ankle injuries at the end of a season. ACL ruptures showed the longest RTC durations (median 222 days). Conclusion This study presents detailed epidemiological data on severe injuries in professional football. The body region most frequently affected by severe injuries was the knee. Several types of severe injuries showed a seasonal injury pattern. The appropriate timing of RTC after an injury is one of the most important and complex decisions to be made. This study provides information on the typical time loss due to specific severe football injuries, which may serve as a guideline.

scholarly journals Protection by Ankle Brace for Lower-Extremity Joints in Half-Squat Parachuting Landing With a Backpack

2021 ◽  
Vol 9 ◽  
Author(s):  
Tianyun Jiang ◽  
Shan Tian ◽  
Tianhong Chen ◽  
Xingyu Fan ◽  
Jie Yao ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Ground Reaction Force ◽  
Angular Displacement ◽  
Reaction Force ◽  
Angular Acceleration ◽  
Ankle Injuries ◽  
Protective Effects ◽  
Ankle Motion ◽  
Quantitative Studies ◽  
Ankle Brace

Half-squat parachuting landing is a kind of activity with high impact force. Injuries on lower-extremity joints are common in half-squat parachuting landing and would be increased with a backpack. An ankle brace was used to prevent ankle injuries in landing. However, few quantitative studies reported about the protection of an ankle brace for lower-extremity joints in half-squat parachuting landing with a backpack. This study focused on evaluating the protective effects of an ankle brace in half-squat parachuting landing with a backpack. Seven male participants landed from 120 cm with a backpack and an ankle brace. Each participant performed three landing trials on every experimental condition. Kinetics and kinematics of the hip, knee, and ankle were analyzed. It was found that the ankle brace did not significantly affect the ground reaction force with backpack but increased the ground reaction force from 14.7 ± 2.0 bodyweight to 16.2 ± 1.9 bodyweight (p = 0.017) without the backpack. The ankle brace significantly (p &lt; 0.05) decreased the angular displacement, angular velocity, and angular acceleration of the ankle both without and with the backpack. In conclusion, the ankle brace could restrict ankle motion and significantly increase ground reaction force without the backpack. However, the ankle brace did not significantly influence ground reaction force and still restricted ankle motion with the backpack. Therefore, the ankle brace was more effective in half-squat parachuting landing with the backpack than no-backpack landing.

scholarly journals Effect of jump heights, landing techniques, and participants on vertical ground reaction force and loading rate during landing on three different Korean teeterboards

2021 ◽  
pp. 175433712110580
Author(s):  
Marion Cossin ◽  
Annie Ross ◽  
François Prince
Keyword(s):  
Injury Risk ◽  
Loading Rate ◽  
Reaction Force ◽  
Pressure Sensors ◽  
High Impact ◽  
The Body ◽  
Boosted Regression Trees ◽  
Jump Height ◽  
Vertical Ground Reaction Force ◽  
Vertical Ground

Korean teeterboard is one of the most physically and technically demanding circus disciplines. Two performers take turns jumping vertically and land with high impact. The aims of this study were to (1) compare the stiffness across three different teeterboards, and (2) compare Peak Landing Force (PLF) and Maximal Loading Rate (MLR) of four acrobats performing jumps from three teeterboards using four landing techniques (normal, smooth, straight legs, and empty board). Pressure sensors were used to determine recorded forces under the feet, while Boosted Regression Trees (BRT) was used to analyze factors contributing to PLF and MLR. Standard static loading protocol was used to estimate teeterboard stiffness. PLF and MLR increased with jump height. PLF and MLR were reached when landing on the teeterboard with the highest stiffness. The “normal” and “straight legs” landing techniques were associated with higher PLF and MLR. The BRT model was able to associate both PLF and MLR with jump height, participant, teeterboard, and landing technique factors. PLF reached 13.5 times the body weight when landing on the stiffer teeterboard using the straight legs technique. Trainers should be aware of the injury risk to teeterboard acrobats during landing.

scholarly journals IMPACT OF COMPETITIVE LEVEL AND AGE ON THE STRENGTH AND ASYMMETRY OF YOUNG SOCCER PLAYERS

2018 ◽  
Vol 24 (5) ◽  
pp. 357-360 ◽  
Author(s):  
Jacielle Carolina Ferreira ◽  
Silvia Ribeiro Santos Araujo ◽  
Eduardo Mendonça Pimenta ◽  
Hans-Joachim Karl Menzel ◽  
Fabíola Bertú Medeiros ◽  
...  
Keyword(s):  
Peak Power ◽  
Muscular Strength ◽  
Reaction Force ◽  
Soccer Players ◽  
Diagnostic Study ◽  
Jump Height ◽  
Level Of Evidence ◽  
Strength Performance ◽  
Limb Asymmetry ◽  
Vertical Jumps

ABSTRACT Introduction: Muscular strength is an essential capacity for soccer players; however, the profile of this capacity has not yet been clearly established in young players. Objective: To compare muscular strength performance in the countermovement jump (CMJ) task and the presence of lower limb asymmetry among soccer athletes of the under 15 (U15), under 17 (U17) and under 20 (U20) categories, and between two teams of different competitive levels. Methods: One hundred and fifty one young soccer players of three different categories (U15, U17 and U20) from two teams in the Brazilian first and second divisions performed six vertical jumps in a system of two force plates. Ground reaction force (GRF) was used to calculate jump height and to obtain the variables Peak force (FMAX), Impulse (I) and Peak power (PMAX) with regard to body mass and the respective asymmetry values. Results: No differences were found in the performance and asymmetry variable between the categories (Jump height: p=0.23; FMAX: p=0.15; I: p=0.11; PMAX: p=0.32; FMAX asymmetry: p=0.21; I asymmetry: p=0.58; PMAX asymmetry: p=0.58). The first division club had higher muscle strength and asymmetry values than the second division club (Jump height: p<0.01; I: p<0.01; PMAX: p<0.01; FMAX asymmetry: p<0.01; I asymmetry: p<0.01; PMAX asymmetry: p<0.01), except for FMAX (p=0.63). No variable had an interaction effect (club x category). Conclusion: As categories progress, jump height, relative I, PMAX and FMAX values and their respective asymmetries are stable. The asymmetry and strength performance of the first division club were higher than that of the second division club, except for FMAX, indicating that the competitive level may influence strength performance and the development of asymmetry. Level of Evidence II; Diagnostic study – Investigating a diagnostic test.

Prophylactic Bracing Decreases Ankle Injuries in Collegiate Female Volleyball Players

2007 ◽  
Vol 36 (2) ◽  
pp. 324-327 ◽  
Author(s):  
David I. Pedowitz ◽  
Sudheer Reddy ◽  
Selene G. Parekh ◽  
G. Russell Huffman ◽  
Brian J. Sennett
Keyword(s):  
National Collegiate Athletic Association ◽  
Case Series ◽  
Injury Rate ◽  
Ankle Injury ◽  
Ankle Injuries ◽  
Ankle Sprains ◽  
Level Of Evidence ◽  
Injury Data ◽  
Ankle Brace ◽  
Volleyball Players

Background Ankle injuries account for the highest percentage of injuries among female collegiate volleyball players. Since 1998, all female volleyball players at the authors’ institution have worn bilateral double-upright padded ankle braces at all times. Purpose To review the authors’ experience with this brace in preventing ankle injuries that result in a loss of play. Study Design Case series; Level of evidence, 4. Methods Injury data, preparticipation medical histories, and total exposure data were collected prospectively on all female volleyball players at the authors’ institution from 1998 to 2005. Injuries and exposures were defined based on established National Collegiate Athletic Association Injury Surveillance System criteria. Injury rate was calculated as the number of injuries per 1000 exposures. The National Collegiate Athletic Association female volleyball injury data from 1998 to 2005 were used for comparison. Results During the study period, there were a total of 13 500 exposures and 1 injury in our group yielding an injury rate of 0.07 per 1000 exposures. Nearly half of our athletes had a preparticipation history of ankle sprains, yet only 1 ankle injury occurred during all of our braced exposures. Conclusion There were 811 710 exposures and 797 injuries in the National Collegiate Athletic Association comparison group with an increased injury rate of 0.98 per 1000 exposures ( P = .001). Prophylactic use of a double-upright ankle brace significantly reduced the ankle injury rate compared with that reported by the National Collegiate Athletic Association. From these data, it appears that the use of such a brace is an effective way to decrease the incidence of ankle injuries in this active but vulnerable group of athletes.

scholarly journals Effect of Knee Compression on Kinetic Variables During Vertical Jumps

2018 ◽  
Vol 72 (6) ◽  
pp. 327-333
Author(s):  
Seung Hyun Hyun ◽  
Hyeonseong Jin
Keyword(s):  
Loading Rate ◽  
Vertical Jump ◽  
Reaction Force ◽  
Passive Force ◽  
Active Force ◽  
Vertical Jump Height ◽  
Significant Difference ◽  
The Mean ◽  
Vertical Jumps ◽  
Compression Condition

Abstract The purpose of this study was to determine how knee compression affected kinetic variables during vertical jumps. Ten healthy males, age 20s, performed a single maximum vertical jump and a ten-consecutive vertical jump trial without knee compression (control condition) and with knee compression. The collected data of ground reaction force were used to analyse the vertical jump height (VJH), peak active force (PAF), decay rate (DR), peak passive force (PPF), loading rate (LR), and the coefficient of variation (CV). During a maximum vertical jump, knee compression increased the magnitudes of DR, PAF, and VJH by 19.8%, 3.41%, and 4.87%, respectively, compared to those under a control condition. During ten consecutive vertical jumps, PAF and VJH showed statistically significant difference according to the repetition count. Also, the mean and CV of PAF, DR, LR, and VJH over consecutive jumps were higher in magnitude under knee compression condition than under the control condition.

Effects of a motor imagery-based exercise protocol on chronic pain and emotional distress in patients with fibromyalgia syndrome: A pilot study

2021 ◽  
pp. 1-10
Author(s):  
Teresa Paolucci ◽  
Francesco Agostini ◽  
Massimiliano Mangone ◽  
Andrea Torquati ◽  
Simona Scienza ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Fibromyalgia Syndrome ◽  
Coping Behavior ◽  
Exercise Program ◽  
Rehabilitation Program ◽  
The Body ◽  
Control Group ◽  
Exercise Protocol ◽  
And Coping

BACKGROUND: Fibromyalgia (FM) is a chronic condition characterized by widespread muscular or musculoskeletal pain of at least 3 months’ duration, occurring above and below the waist, on both sides of the body. OBJECTIVE: The aim of this study was to evaluate the effectiveness of a rehabilitation program based on motor imagery versus a conventional exercise program in FM in terms of pain, functional and psychological outcomes. METHODS: Twenty-nine female subjects were randomly assigned to a group receiving motor imagery-based rehabilitation (MIG) or to a control group (CG) performing conventional rehabilitation. Outcome assessments were performed before (T0) and after 10 sessions of treatment (T1) and at a 12-week follow-up (T2). Pain, function and psychological measurements were conducted by means of different questionnaires. RESULTS: Both treatments improved all outcomes at post-treatment (T1) and follow-up (T2). The MIG showed a significant improvement in anxiety disorder associated with FM with respect to the CG, as well as improvements in coping strategies. CONCLUSIONS: Rehabilitation treatment based on motor imagery showed a stronger effect on anxiety and coping behavior than traditional physiotherapy in patients with FM. Integrated psychological support would be desirable in this setting. Further research is needed to explore the aspects investigated in more depth.

Sign in / Sign up

Export Citation Format

Share Document