scholarly journals EFFECT OF FOOTBALL ON REHABILITATION OF ANKLE INJURY PATIENTS

2022 ◽  
Vol 28 (1) ◽  
pp. 62-64
Author(s):  
Jie Liu

ABSTRACT Introduction: Brief introduction: Ankle tendon and ligament sports injuries are common in football players. Objective: To continue to improve special strength training related to the characteristics of football after rehabilitation of injured ankle tendons and ligaments. Methods: Two master football sportsmen were rehabilitated by multi-point equal-length, short-arc and long-arc equal-speed training combined with balance ability exercises. Results: There were two long muscle L be maintain muscle tone plantar flexors force four times of 96 n/m, n/m 121, 140 n/m, 145 n/m than back flexors force of 63 n/m, 52 n/m, 60 n/m, 74 n/m tall. Plantar flexor fatigue was 57%, 30%, 29%, 12%, 28%, 18%, 20%, 21%. Conclusions: With the passing of time, the relative peak moment value of the right ankle plantar flexor muscle group of the two patients kept rising, the dorsiflexor muscle was basically flat, and the work fatigue index decreased step by step, indicating that the right ankle muscle strength level was significantly improved, the anti-fatigue ability was improved, and the rehabilitation treatment had a good effect. Level of evidence II; Therapeutic studies - investigation of treatment results.

2021 ◽  
Vol 288 (1947) ◽  
Author(s):  
Taylor J. M. Dick ◽  
Christofer J. Clemente ◽  
Laksh K. Punith ◽  
Gregory S. Sawicki

In our everyday lives, we negotiate complex and unpredictable environments. Yet, much of our knowledge regarding locomotion has come from studies conducted under steady-state conditions. We have previously shown that humans rely on the ankle joint to absorb energy and recover from perturbations; however, the muscle–tendon unit (MTU) behaviour and motor control strategies that accompany these joint-level responses are not yet understood. In this study, we determined how neuromuscular control and plantar flexor MTU dynamics are modulated to maintain stability during unexpected vertical perturbations. Participants performed steady-state hopping and, at an unknown time, we elicited an unexpected perturbation via rapid removal of a platform. In addition to kinematics and kinetics, we measured gastrocnemius and soleus muscle activations using electromyography and in vivo fascicle dynamics using B-mode ultrasound. Here, we show that an unexpected drop in ground height introduces an automatic phase shift in the timing of plantar flexor muscle activity relative to MTU length changes. This altered timing initiates a cascade of responses including increased MTU and fascicle length changes and increased muscle forces which, when taken together, enables the plantar flexors to effectively dissipate energy. Our results also show another mechanism, whereby increased co-activation of the plantar- and dorsiflexors enables shortening of the plantar flexor fascicles prior to ground contact. This co-activation improves the capacity of the plantar flexors to rapidly absorb energy upon ground contact, and may also aid in the avoidance of potentially damaging muscle strains. Our study provides novel insight into how humans alter their neural control to modulate in vivo muscle–tendon interaction dynamics in response to unexpected perturbations. These data provide essential insight to help guide design of lower-limb assistive devices that can perform within varied and unpredictable environments.


2020 ◽  
Vol 35 (6) ◽  
pp. 819-824
Author(s):  
Taisuke MAYUSUMI ◽  
Akira HARADA ◽  
Shigeru USUDA

Geriatrics ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 114
Author(s):  
Tadayoshi Minamisawa ◽  
Noboru Chiba ◽  
Eizaburo Suzuki

Our aim was to clarify the effect of aging on the coherence of electromyograms of plantar flexor pairs during bipedal stance and to clarify the relationship between coherence and center-of-mass acceleration (COMacc). The subjects were 16 adults and 18 older adults. Intra- and intermuscular coherence and phase analyses were used to analyze the muscle pairs of bilateral and unilateral plantar flexor muscle groups. The relationship between coherence value and anterior–posterior COMacc of the plantar flexor muscle pairs was also examined to determine whether the connectivity of the lower limb muscle pairs is functionally important. The older adults showed higher coherence in the frequency range of 0–4 Hz for muscle pairs than the younger adults. In phase analysis, the older adults showed a phase difference between bilateral heteronymous muscle pairs in the frequency range of 0–6 Hz, which was one of the characteristics not seen in the younger adults. Correlation analysis showed that all the muscle pairs were moderately correlated with COMacc in the older adults. Not only does aging affects the organization of the bilateral and unilateral postural muscle activity of the plantar flexors during bipedal stance, but such organization may also be related to the increased COMacc characteristics of older adults.


2019 ◽  
Author(s):  
Anthony L. Hessel ◽  
Brent J. Raiteri ◽  
Michael J. Marsh ◽  
Daniel Hahn

AbstractAnkle exoskeletons have been developed to assist walking by offloading the plantar flexors work requirements, which reduces muscle activity level. However, reduced muscle activity alters plantar flexor muscle-tendon unit dynamics in a way that is poorly understood. We therefore evaluated torque-fascicle length properties of the soleus and lateral gastrocnemius during voluntary contractions at simulated activity levels typical during late stance with and without an ankle exoskeleton. Soleus activity levels (100, 30, and 22% maximal voluntary activity) were produced by participants via visual electromyography feedback at ankle angles ranging from −10° plantar flexion to 35° dorsiflexion. Using dynamometry and ultrasound imaging, torque-fascicle length data of the soleus and lateral gastrocnemius were produced. The results indicate that muscle activity reductions observed with an exoskeleton shift the torque-angle and torque-fascicle length curves to more dorsiflexed ankle angles and longer fascicle lengths where no descending limb is physiologically possible. This shift is in line with previous simulations that predicted a similar increase in the operating fascicle range when wearing an exoskeleton. These data suggest that a small reduction in muscle activity causes changes to torque-fascicle length properties, which has implications for the design and testing of future ankle exoskeletons for assisted walking.Significance StatementAssistive lower-limb exoskeletons reduce the metabolic cost of walking by reducing the positive work requirements of the plantar flexor muscles. However, if the exoskeleton reduces plantar flexor muscle activity too much, then the metabolic benefit is lost. The biological reasons for this are unclear and hinder further exoskeleton development. This research study is the first to directly evaluate if a reduction in plantar flexor muscle activity similar to that caused by wearing an exoskeleton affects muscle function. We found that reduced muscle activity changes the torque-length properties of two plantar flexors, which could explain why reducing muscle activity too much can increase metabolic cost.


2021 ◽  
Vol 27 (1) ◽  
pp. 98-102
Author(s):  
Nikola Majstorović ◽  
Goran Nešić ◽  
Vladimir Grbić ◽  
Zoran Savić ◽  
Milena Živković ◽  
...  

ABSTRACT Introduction When a person is in a standing position, the plantar flexor muscles are involved in most static and dynamic body movements. Objectives The aim of this study was to investigate the trial to trial and factorial reliability of measuring the contractile characteristics of PF muscles using a simple novel field test. Methods The sample consisted of 452 healthy subjects, 120 male and 332 female. The research was conducted by means of the trial to trial testing method, using isometric dynamometry performed in field conditions. ANOVA was used to estimate the differences among the trials, Cronbach’s alpha and interclass correlation to estimate the correlations among the trials, and principal component analysis to evaluate the contribution of each trial to overall variability. Results The main findings of this study are that trials differed significantly (p<0.000) for maximal force (Fmax) and maximal rate of force development (RFDmax), indicating that the three procedural trials were necessary. The trials were highly correlated (Fmax, RFDmax, r>0.9), proving that measuring was reliable, and the factorial analysis separated the second and third trials, the second trial accounting for most of the total variability. Conclusions The simple novel field test for the measurement of plantar flexor contractile characteristics recommended by this study proved to be as highly reliable as laboratory testing, but was easy to perform in conditions outside of scientific or diagnostic institutions, which greatly facilitates the work of scientists, coaches and professionals. Level of Evidence II; Diagnostic Studies – Investigating a diagnostics test.


2014 ◽  
Vol 117 (12) ◽  
pp. 1486-1492 ◽  
Author(s):  
Gabriel S. Trajano ◽  
Laurent B. Seitz ◽  
Kazunori Nosaka ◽  
Anthony J. Blazevich

The purpose of the present study was to examine the possible inhibitory effect of passive plantar flexor muscle stretching on the motoneuron facilitatory system. Achilles tendon vibration (70 Hz) and triceps surae electrical stimulation (20 Hz) were imposed simultaneously in 11 subjects to elicit contraction through reflexive pathways in two experiments. In experiment 1, a vibration-stimulation protocol was implemented with the ankle joint plantar flexed (+10°), neutral (0°), and dorsiflexed (−10°). In experiment 2, the vibration-stimulation protocol was performed twice before (control), then immediately, 5, 10, and 15 min after a 5-min intermittent muscle stretch protocol. Plantar flexor torque and medial and lateral gastrocnemius and soleus (EMGSol) EMG amplitudes measured during and after (i.e., self-sustained motor unit firing) the vibration protocol were used as an indicator of this facilitatory pathway. In experiment 1, vibration torque, self-sustained torque and EMGSol were higher with the ankle at −10° compared with 0° and +10°, suggesting that this method is valid to assess motoneuronal facilitation. In experiment 2, torque during vibration was reduced by ∼60% immediately after stretch and remained depressed by ∼35% at 5 min after stretch ( P < 0.05). Self-sustained torque was also reduced by ∼65% immediately after stretch ( P < 0.05) but recovered by 5 min. Similarly, medial gastrocnemius EMG during vibration was reduced by ∼40% immediately after stretch ( P < 0.05), and EMGSol during the self-sustained torque period was reduced by 44% immediately after stretch ( P < 0.05). In conclusion, passive stretch negatively affected the motoneuronal amplification for at least 5 min, suggesting that motoneuron disfacilitation is a possible mechanism influencing the stretch-induced torque loss.


2020 ◽  
Vol 22 (4) ◽  
pp. 48-54
Author(s):  
Byungjoo Noh

OBJECTIVES The purpose of this study was to compare plantar flexor force due to different foot strike patterns during running in barefoot and shod condition with and without medial tibial stress syndrome (MTSS).METHODS Fifteen collegiate soccer players who volunteered to participate were divided into MTSS group and controls. Participants’ running at 3.3 m/s with and without shoes were recorded with a 12-camera system at a sampling frequency of 250 Hz. Each subject completed different foot strike patterns of running as the forefoot strike pattern (FFS) and rearfoot strike pattern (RFS) were collected. Plantar flexor forces were investigated by software for interactive musculoskeletal modeling.RESULTS Normalized plantar flexor forces in barefoot running with the FFS pattern had greater soleus and peroneus brevis muscle forces in the MTSS group than in controls during the first half of stance, although there were no statistically significant differences for other plantar flexor muscle forces between groups and shod running. In plantar flexor forces due to foot strike pattern, the FFS pattern showed higher plantar flexor forces than the RFS pattern.CONCLUSIONS The results of musculoskeletal modeling suggest that subjects with MTSS have greater muscle forces of the plantar flexor during running, especially barefoot running with the FFS pattern. It also suggests increased forces in some plantar flexors generated great traction force by repetitively landing on connective tissues in the deep crural fascia causing inflammation at the posteromedial site of the tibia in MTSS.


2021 ◽  
Vol 30 (8) ◽  
pp. 653-659
Author(s):  
Toru Takekawa ◽  
Mariko Ikegaya ◽  
Takafumi Etoh ◽  
Yasushi Shiio ◽  
Hiroshi Sugihara ◽  
...  

We report the successful treatment of two cases of difficult-to-treat pressure ulcers with botulinum toxin type A (BoNT-A). A 71-year-old male patient with Parkinson's disease presented with severe hand grip deformities of the fingers and a pressure ulcer (PU) on the right hand. He received 240U of BoNT-A into the upper limb muscles, which improved finger mobility during passive extension and resulted in resolution of the palm PU. No recurrence was noted. A 69-year-old female patient with Lewy body dementia presented with a PU on the palm side of the middle finger apex of the right hand, with exposure of the phalanx bone and dark red oedematous granulation of the tip of the finger. Severe muscle tone was noted. She received 240U of BoNT-A injected into the muscles of the upper extremities. This resulted in the disappearance of the contracture between the middle finger cusp and palm, and prompt healing of the PU. A protective finger orthosis was also used to improve hand finger grip and prevent further PUs. Although BoNT-A injection resulted in only slight improvement in the range of motion, it produced relief of pressure with consequent healing of the PU. Injection of BoNT-A into the affected muscles of the patients in this case report was effective in reducing flexor muscle tone, relief of pressure on the palm skin and healing of hand PUs.


Author(s):  
Timothy S. Pulverenti ◽  
Gabriel S. Trajano ◽  
Benjamin J. C. Kirk ◽  
Vanesa Bochkezanian ◽  
Anthony J. Blazevich

Sign in / Sign up

Export Citation Format

Share Document