scholarly journals The Influence of Kinesio Tape and an Ankle Brace on the Lower Extremity Joint Motion in Fatigued, Unstable Ankles during a Lateral Drop Landing

2021 ◽  
Vol 18 (11) ◽  
pp. 6081
Author(s):  
Cheng-Chieh Lin ◽  
Wan-Chin Lee ◽  
Jih-Ching Chen ◽  
Shing-Jye Chen ◽  
Cheng-Feng Lin
Keyword(s):  
Lower Extremity ◽  
External Support ◽  
Joint Motion ◽  
Plantar Flexors ◽  
Flexor Muscle ◽  
Kinesio Tape ◽  
Ankle Motion ◽  
Drop Landing ◽  
Ankle Brace ◽  
Induced Changes

Background: An unstable ankle along with plantar flexor muscle fatigue may exacerbate landing performance. External support may be an option to control the ankle motion and protect joints from injuries. Research goal: To investigate the immediate changes in the joint motion of a lower extremity under ankle plantar flexors fatigue conditions in athletes with unstable ankles using different external supports. Methods: A total of 44 participants were allocated to a control (Cn) group, an ankle brace (AB) group, and a kinesio tape (KT) group, and were asked to perform a lateral drop landing before and after a fatigue protocol. The outcome measures were fatigue-induced changes in the maximal joint angle and changes in the angle ranges of the hip, knee, and ankle. Results: Smaller changes in the maximal hip abduction were found in the AB group (p = 0.025), and the KT group exhibited smaller changes in the maximal ankle dorsiflexion (p = 0.009). The AB group landed with a smaller change in the range of hip flexion and knee flexion (p = 0.008 and 0.006). The Cn group had greater fatigue-induced changes in the COM range than AB and KT group (p = 0.002 and 0.028). Significance: Despite the beneficial effect in the postural control in the frontal plane, the use of AB might constrain the distal joint motion which might lead to an extended knee landing posture resulting in secondary injuries to the knee joint. Therefore, the use of AB in conjunction with an additional training of landing strategy might be recommended from the injury prevention perspective.

scholarly journals Effects of Different Ankle Supports on the Single-Leg Lateral Drop Landing Following Muscle Fatigue in Athletes with Functional Ankle Instability

2020 ◽  
Vol 17 (10) ◽  
pp. 3438 ◽  
Author(s):  
Cheng-Chieh Lin ◽  
Shing-Jye Chen ◽  
Wan-Chin Lee ◽  
Cheng-Feng Lin
Keyword(s):  
Muscle Fatigue ◽  
Ankle Instability ◽  
Reaction Force ◽  
Vertical Ground Reaction Force ◽  
Functional Ankle Instability ◽  
Kinesio Tape ◽  
Drop Landing ◽  
Ankle Brace ◽  
Induced Changes ◽  
The Impact

Background: Ankle support has been utilized for athletes with functional ankle instability (FAI), however, its effect on the landing performance during muscle fatigue is not well understood. This study aimed to examine the effects of ankle supports (ankle brace vs. Kinesio tape) on athletes with FAI following fatigued single-leg landing. Methods: Thirty-three young FAI athletes (CAIT scores < 24) were randomly allocated to control (Cn), ankle brace (AB) and Kinesio tape (KT) groups. All athletes performed single-leg lateral drop landings following ankle fatigue protocol. The fatigue-induced changes in kinetic parameters were measured among three groups. Results: A significant increase in peak vertical ground reaction force (vGRF) was found in the AB group (0.12% body weight (BW)) compared to that of the KT (0.02% BW) and Cn (median = 0.01% BW) groups. Significant decrease in both COP medial-lateral (ML) and anterior-posterior (AP) ranges were also found in the KT group (median = −0.15% foot width (FW) & median = −0.28% foot length (FL)) than those of the Cn group (median = 0.67% FW& median = 0.88% FL). Conclusions: Ankle braces might hamper the ability to absorb the impact force during landing. On the other hand, Kinesio tape might be beneficial for the postural control during landing.

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.

Kinetics of High-Heeled Gait

2003 ◽  
Vol 93 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Meltem Esenyel ◽  
Katlen Walsh ◽  
Judith Gail Walden ◽  
Andrew Gitter
Keyword(s):  
Lower Extremity ◽  
Local Community ◽  
Frontal Plane ◽  
Plantar Flexors ◽  
Flexor Muscle ◽  
Joint Kinetics ◽  
Muscle Moments ◽  
Hip Flexor ◽  
Kinetics Of

A within-subject comparative study of walking while wearing low-heeled sports shoes versus high-heeled dress shoes was performed to identify and describe changes in lower-extremity joint kinetics associated with wearing high-heeled shoes during level overground walking. A volunteer sample of 15 unimpaired female subjects recruited from the local community underwent quantitative measurement of sagittal and frontal plane lower-extremity joint function, including angular motion, muscular moment, power, and work. When walking in high-heeled shoes, a significant reduction in ankle plantar flexor muscle moment, power, and work occurred during the stance phase, whereas increased work was performed by the hip flexor muscles during the transition from stance to swing. In the frontal plane, increased hip and knee varus moments were present. These differences demonstrate that walking in high-heeled shoes alters lower-extremity joint kinetic function. Reduced effectiveness of the ankle plantar flexors during late stance results in a compensatory enhanced hip flexor “pull-off” that assists in limb advancement during the stance-to-swing transition. Larger muscle moments and increased work occur at the hip and knee, which may predispose long-term wearers of high-heeled shoes to musculoskeletal pain. (J Am Podiatr Med Assoc 93(1): 27-32, 2003)

Plantar Flexor Muscle Architecture Changes as a Result of Eccentric Exercise in Patients With Achilles Tendinosis

2014 ◽  
Vol 7 (6) ◽  
pp. 460-465 ◽  
Author(s):  
Matthew T. Crill ◽  
Gregory Berlet ◽  
Christopher Hyer
Keyword(s):  
Case Series ◽  
Muscle Architecture ◽  
Medial Gastrocnemius ◽  
Eccentric Training ◽  
Plantar Flexors ◽  
Flexor Muscle ◽  
Fascicle Length ◽  
Achilles Tendinosis ◽  
Muscle Fascicle ◽  
Maximal Load

Eccentric training for Achilles tendinosis (AT) has been reported to significantly improve patient symptoms. There has been no biomechanical explanation on the mechanism for specific rehabilitation technique. The purpose of this study was to determine changes in muscle architecture that occurred as a result of Achilles tendinosis injury and a subsequent eccentric rehabilitation program. Twenty-five patients (age, 53.3 ± 17.5 years) diagnosed with AT participated in 6 weeks of rehabilitation. Specific exercises for the ankle plantar flexors consisted of maximal load eccentric muscle action using 3 sets of 15 repetitions. Patients also completed a protocol for AT, which consisting of traditional rehabilitation. Medial gastrocnemius (GM) and lateral gastrocnemius (GL) muscle fascicle length and thickness were measured with ultrasound at 2-week intervals from initial treatment day to the end of 6 weeks of rehabilitation. Medial gastrocnemius fascicle length increased (45.1 ± 10.5 mm to 51.4 ± 10.5 mm; P = .22) between the initial day of rehabilitation and after 6 weeks of rehabilitation. But, GM thickness (16.3 ± 3.5 mm to 16.8 ± 2.0 mm), GL fascicle length (47.2 ± 10.0 mm to 47.1 ± 7.4 mm), and GL thickness (14.9 ± 5.2 mm to 14.4 ± 2.7 mm) did not change as a result of rehabilitation. A 6-week eccentric-biased exercise increased the GM muscle fascicle length by 12%, but GM thickness, GL fascicle length, and GL thickness did not change as a result of rehabilitation. Eccentric training for the treatment of AT is well recognized, but the mechanism of action has not been previously reported. A 6-week eccentric training protocol increased the GM muscle fascicle length by 12%, and this correlated with improvement in a validated patient outcome scoring system. Further study is warranted to determine a predictive relationship between improvement of GM fascicle length and outcome scores. Levels of Evidence: Therapeutic, Level IV: Case series

Influence of Bicycle Seat Tube Angle and Hand Position on Lower Extremity Kinematics and Neuromuscular Control: Implications for Triathlon Running Performance

2011 ◽  
Vol 27 (4) ◽  
pp. 297-305 ◽  
Author(s):  
Amy Silder ◽  
Kyle Gleason ◽  
Darryl G. Thelen
Keyword(s):  
Lower Extremity ◽  
Neuromuscular Control ◽  
Rectus Femoris ◽  
Body Motion ◽  
Treadmill Running ◽  
Whole Body ◽  
Knee Extensors ◽  
Hand Position ◽  
Plantar Flexors ◽  
Lower Extremity Muscle

We investigated how varying seat tube angle (STA) and hand position affect muscle kinematics and activation patterns during cycling in order to better understand how triathlon-specific bike geometries might mitigate the biomechanical challenges associated with the bike-to-run transition. Whole body motion and lower extremity muscle activities were recorded from 14 triathletes during a series of cycling and treadmill running trials. A total of nine cycling trials were conducted in three hand positions (aero, drops, hoods) and at three STAs (73°, 76°, 79°). Participants also ran on a treadmill at 80, 90, and 100% of their 10-km triathlon race pace. Compared with cycling, running necessitated significantly longer peak musculotendon lengths from the uniarticular hip flexors, knee extensors, ankle plantar flexors and the biarticular hamstrings, rectus femoris, and gastrocnemius muscles. Running also involved significantly longer periods of active muscle lengthening from the quadriceps and ankle plantar flexors. During cycling, increasing the STA alone had no affect on muscle kinematics but did induce significantly greater rectus femoris activity during the upstroke of the crank cycle. Increasing hip extension by varying the hand position induced an increase in hamstring muscle activity, and moved the operating lengths of the uniarticular hip flexor and extensor muscles slightly closer to those seen during running. These combined changes in muscle kinematics and coordination could potentially contribute to the improved running performances that have been previously observed immediately after cycling on a triathlon-specific bicycle.

Effects of Lower Extremity Strength Training on Functional Mobility in Older Adults

2000 ◽  
Vol 8 (3) ◽  
pp. 214-227 ◽  
Author(s):  
L. Jerome Brandon ◽  
Lisa W. Boyette ◽  
Deborah A. Gaasch ◽  
Adrienne Lloyd
Keyword(s):  
Older Adults ◽  
Lower Extremity ◽  
Strength Training ◽  
Relative Strength ◽  
Functional Mobility ◽  
Knee Extensors ◽  
Plantar Flexors ◽  
Lower Extremity Strength ◽  
Time Required ◽  
Chair Rise

This study evaluated the effects of a 4-month lower extremity strength-training program on mobility in older adults. Eighty-five older adults (43 experimental, ES, and 42 comparison, CS) with a mean age of 72.3 years served as participants. The ES strength-trained plantar flexors (PF), knee flexors (KF), and knee extensors (KE) 1 hr/day, 3 days a week for 4 months. Both the ES and CS were evaluated for PF, KF, and KE strength (1 RM) and the time required to complete floor rise, chair rise, 50-ft walk, and walking up and down stairs before and after the training intervention. The ES increased (p < .05) both absolute (51.9%) and relative strength (1 RM/body weight, 52.4%) after training. Only chair-rise and floor-rise tasks improved significantly after training. Baseline and posttraining mobility tasks predicted from 1 RMs had low to moderate R values. These results suggest that strength is necessary for mobility, but increasing strength above baseline provides only marginal improvement in mobility for reasonably fit older adults.

scholarly journals Pregnancy-induced changes in lower extremity superficial veins: An ultrasound scan study

2000 ◽  
Vol 32 (3) ◽  
pp. 570-574 ◽  
Author(s):  
Pierre Boivin ◽  
André Cornu-Thenard ◽  
Yves Charpak
Keyword(s):  
Lower Extremity ◽  
Ultrasound Scan ◽  
Induced Changes
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