Displaying publications 21 - 40 of 128 in total

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  1. Zaghlul N, Goh SL, Razman R, Danaee M, Chan CK
    PLoS One, 2023;18(1):e0280361.
    PMID: 36649257 DOI: 10.1371/journal.pone.0280361
    The validity and reliability of the Lafayette stability platform are well-established for double leg testing. However, no evaluation of single leg (SL) stance on the platform was discovered yet. Therefore, this study aimed to investigate the reliability of conducting the SL stance on the Lafayette platform. Thirty-six healthy and active university students (age 23.2 ± 3.2 years; BMI 21.1 ± 3.1 kg/m2) were tested twice, one week apart (week 1; W1, week 2; W2). They stood on their dominant leg with eyes-open (EO) and eyes-closed (EC) in random order. Three successful trials of 20 seconds each were recorded. The duration during which the platform was maintained within 0° of tilt was referred to as time in balance (TIB). At all-time points, TIB was consistently longer in EO (EOW1: 17.02 ± 1.04s; EOW2: 17.32 ± 1.03s) compared to EC (ECW1: 11.55 ± 1.73s; ECW2: 13.08 ± 1.82s). A ±10 seconds difference was demonstrated in the Bland-Altman analysis in both EO and EC. Lower standard error of measurement (SEM) and coefficient of variation (CV) indicated consistent output. High intraclass correlation coefficient (ICC) values were seen between weeks (EO = 0.74; EC = 0.76) and within weeks (EOW1 = 0.79; EOW2 = 0.86; ECW1 = 0.71; ECW2 = 0.71). Although statistical measures (i.e., SEM, CV, and ICC) indicated good reliability of Lafayette for SL tasks, the wide agreement interval is yet to be clinically meaningful. Factors underlying the wide variation need to be identified before Lafayette is used for TIB assessment.
    Matched MeSH terms: Leg*
  2. Soh, K.G., Ruby, H., Soh, K.L.
    JUMMEC, 2007;10(1):25-28.
    MyJurnal
    The purposes of the study were: (1) to determine the agility and leg power among Malaysian national junior netball players and (2) to determine the impact of eight-week aerobic and strength-training programme on these two variables. A total of 21 netball players from Bukit Jalil Sport School were selected as the subjects in this study. The SEMO Agility Run test was used to determine the agility level while leg power was measured using the Vertical Jump test. Pre-test and post-test results showed no significant differences in the agility and leg power level among the netball players. The mean values for the agility and leg power post-test were 12.59 (SD = 0.56) seconds and 50.24 (SD = 4.90) cm respectively. The pre-test and post-test results for different playing positions recorded the highest improvement in agility and leg power among attacker, followed by centre, and defender. Thus, the training conducted in this study was found to have improved agility and leg power marginally, especially among attacker and centre netball players.
    Matched MeSH terms: Leg
  3. Abdul-Rahman NR, Mohammad KF, Ibrahim S
    Singapore Med J, 2009 Jun;50(6):e223-5.
    PMID: 19551303
    The Klippel-Trenaunay syndrome is a combination of venous and capillary malformations associated with soft tissue and/or bony limb hypertrophy, with or without lymphatic malformations. Although persistent foetal veins are rare, the persistence of the lateral marginal vein is a common association in this syndrome. It results in venous hypertension, which gives rise to venous varicosities, which are commonly seen in this syndrome. This is a case report of a 28-year-old man with Klippel-Trenaunay syndrome, with persistence of the lateral marginal vein, affecting his right lower limb. He was treated with an above-knee amputation. The amputated limb was dissected to demonstrate the anatomy of the lateral marginal vein. To the best of the authors' knowledge, the gross anatomy of the lateral marginal vein has not been previously reported.
    Matched MeSH terms: Leg/abnormalities; Leg/blood supply*; Leg/pathology
  4. Hii CST, Gan KB, Zainal N, Mohamed Ibrahim N, Azmin S, Mat Desa SH, et al.
    Sensors (Basel), 2023 Jul 18;23(14).
    PMID: 37514783 DOI: 10.3390/s23146489
    Gait analysis is an essential tool for detecting biomechanical irregularities, designing personalized rehabilitation plans, and enhancing athletic performance. Currently, gait assessment depends on either visual observation, which lacks consistency between raters and requires clinical expertise, or instrumented evaluation, which is costly, invasive, time-consuming, and requires specialized equipment and trained personnel. Markerless gait analysis using 2D pose estimation techniques has emerged as a potential solution, but it still requires significant computational resources and human involvement, making it challenging to use. This research proposes an automated method for temporal gait analysis that employs the MediaPipe Pose, a low-computational-resource pose estimation model. The study validated this approach against the Vicon motion capture system to evaluate its reliability. The findings reveal that this approach demonstrates good (ICC(2,1) > 0.75) to excellent (ICC(2,1) > 0.90) agreement in all temporal gait parameters except for double support time (right leg switched to left leg) and swing time (right), which only exhibit a moderate (ICC(2,1) > 0.50) agreement. Additionally, this approach produces temporal gait parameters with low mean absolute error. It will be useful in monitoring changes in gait and evaluating the effectiveness of interventions such as rehabilitation or training programs in the community.
    Matched MeSH terms: Leg
  5. Gholizadeh H, Abu Osman NA, Eshraghi A, Ali S, Razak NA
    Clin Biomech (Bristol, Avon), 2014 Jan;29(1):87-97.
    PMID: 24315710 DOI: 10.1016/j.clinbiomech.2013.10.013
    Today a number of prosthetic suspension systems are available for transtibial amputees. Consideration of an appropriate suspension system can ensure that amputee's functional needs are satisfied. The higher the insight to suspension systems, the easier would be the selection for prosthetists. This review attempted to find scientific evidence pertaining to various transtibial suspension systems to provide selection criteria for clinicians.
    Matched MeSH terms: Leg*; Male
  6. Sulaiman AR, Munajat I, Mohd EF
    J Pediatr Orthop B, 2014 Mar;23(2):204-5.
    PMID: 24447940 DOI: 10.1097/BPB.0000000000000007
    Matched MeSH terms: Leg Injuries/complications*
  7. Jamil K, Abdul Rashid AH, Ibrahim S
    J Pediatr Orthop B, 2014 Mar;23(2):204.
    PMID: 24447939 DOI: 10.1097/01.bpb.0000434259.00524.7f
    Matched MeSH terms: Leg Injuries/complications*
  8. Gindre C, Lussiana T, Hebert-Losier K, Mourot L
    Int J Sports Med, 2016 Jan;37(1):25-9.
    PMID: 26509380 DOI: 10.1055/s-0035-1555931
    Biomechanical parameters are often analyzed independently, although running gait is a dynamic system wherein changes in one parameter are likely to affect another. Accordingly, the Volodalen® method provides a model for classifying running patterns into 2 categories, aerial and terrestrial, using a global subjective rating scoring system. We aimed to validate the Volodalen® method by verifying whether the aerial and terrestrial patterns, defined subjectively by a running coach, were associated with distinct objectively-measured biomechanical parameters. The running patterns of 91 individuals were assessed subjectively using the Volodalen® method by an expert running coach during a 10-min running warm-up. Biomechanical parameters were measured objectively using the OptojumpNext® during a 50-m run performed at 3.3, 4.2, and 5 m·s(-1) and were compared between aerial- and terrestrial-classified subjects. Longer contact times and greater leg compression were observed in the terrestrial compared to the aerial runners. The aerial runners exhibited longer flight time, greater center of mass displacement, maximum vertical force and leg stiffness than the terrestrial ones. The subjective categorization of running patterns was associated with distinct objectively-quantified biomechanical parameters. Our results suggest that a subjective holistic assessment of running patterns provides insight into the biomechanics of running gaits of individuals.
    Matched MeSH terms: Leg/physiology
  9. Naresh B, Parameswaran S
    Med J Malaysia, 1998 Sep;53 Suppl A:77-82.
    PMID: 10968186
    It is usually a major task providing soft tissue cover to significant defects of the lower leg. A wide variety of flaps and techniques are available, each with its advantages and limitations. Previously described anatomic study of the septocutaneous vessels of the leg have indicated a consistent lower most perforator at 9-12 cm from the tip of the medial malleolus. An island fasciocutaneous flap based on this perforator vessels can be raised subfascially. After the vessels have been dissected clean down to the posterior tibial artery, it can be rotated up to 180 degrees degrees. Successful soft tissue reconstruction was achieved in 18 patients. Most of the tissue loss was due to trauma and were around the ankle and the heel. There were 7 minor complications which resolved completely after 2 months. Its simplicity of design and elevation plus its extensive arc of rotation makes it a reliable and versatile flap in the reconstruction of lower leg defects.
    Matched MeSH terms: Leg/surgery*
  10. Thambi Dorai CR
    Med J Malaysia, 1986 Jun;41(2):173-5.
    PMID: 3547051
    An infant with bilateral congenital ring constrictions in the legs presenting with ischaemic gangrene of one leg is reported. The ischaemia was precipitated by greenstick fracture, the constriction ring producing a 'tourniquet effect' on the swollen tissues. Prophylactic release of deep annular constrictions is advised to prevent complications.
    Matched MeSH terms: Leg/blood supply*
  11. Nair HKR
    J Wound Care, 2018 Sep 01;27(Sup9a):S37-S40.
    PMID: 30207848 DOI: 10.12968/jowc.2018.27.Sup9a.S37
    BACKGROUND: Cases of venous leg ulcers (VLU) are expected to rise due to the rapidly ageing population in Malaysia. Central to the management of these wounds is compression therapy together with an appropriate wound dressing. Pain and discomfort during dressing changes are common in these patients. Polyurethane foam dressings with SMARTPORE technology (micropore dressing; Mundipharma) facilitate vertical absorption of exudate to reduce risks of wound and periwound area maceration. They support easy dressing removal with less pain and trauma to the wound bed. Thus, the micropore dressing was chosen as a viable treatment option in these cases.

    CASES: Case 1, a 74-year-old diabetic female was treated for bilateral VLUs with micropore dressing for several months, which she noted to be painless and convenient. Case 2, a 49-year-old housewife with a solitary VLU was treated with micropore dressing, leading to good treatment results and high satisfaction.

    CONCLUSION: VLUs managed by the micropore dressing resulted in reduced pain and ease of use during dressing changes, as well as noticeable reduction in wound and periwound area maceration. The use of this type of dressing in these cases shows encouraging results and provides a desirable management option. More robust clinical studies are necessary to establish this.

    Matched MeSH terms: Leg Ulcer/therapy*
  12. Ku PX, Abu Osman NA, Wan Abas WAB
    J Biomech, 2016 Dec 08;49(16):3943-3948.
    PMID: 27865478 DOI: 10.1016/j.jbiomech.2016.11.006
    Balance control plays an important role in maintaining daily activity. However, studies on postural control among middle-aged adults are scarce. This study aims (i) to examine directional control (DCL) and electromyography activity (EMG) for different stability levels, and (ii) to determine left-right asymmetry for DCL and muscle activity among sedentary middle-aged adults. Twenty healthy, middle-aged adults (10 males, 10 females; age=50.0±7.5yrs; body height: 1.61±0.10m; body mass: 70.0±14.5kg) participated in the study. EMG for left and right side of rectus femoris (RF), biceps femoris (BF), and medial gastrocnemius (MG) were recorded. Two-way repeated measures analysis of variance was used to assess the effect of dynamic level on DCL and EMG, whereas independent sample t-test was conducted to analyse the asymmetries of DCL and EMG for the left and right leg. When the dynamic tilt surface increased, DCL scores significantly decreased (except forward, forward-rightward, and backward-leftward direction) and only RF muscle indicated significant differences. Left-right asymmetry was found in BF and MG muscles. No significant gender difference was observed in DCL and EMG. These data demonstrated that increased dynamic tilt surface may increase the displacement of center of pressure of certain directions, and stimulate RF activity in dynamic stance among sedentary middle-aged adults. Further studies should be conducted to examine the dynamic stance and muscle activity of the lower limb in age-matched patient groups with balance abnormalities.
    Matched MeSH terms: Leg/physiology
  13. Siboni S, Kristo I, Rogers BD, De Bortoli N, Hobson A, Louie B, et al.
    Clin Gastroenterol Hepatol, 2023 Jul;21(7):1761-1770.e1.
    PMID: 36270615 DOI: 10.1016/j.cgh.2022.10.008
    BACKGROUND & AIMS: The straight leg raise (SLR) maneuver during high-resolution manometry (HRM) can assess esophagogastric junction (EGJ) barrier function by measuring changes in intraesophageal pressure (IEP) when intra-abdominal pressure is increased. We aimed to determine whether increased esophageal pressure during SLR predicts pathologic esophageal acid exposure time (AET).

    METHODS: Adult patients with persistent gastroesophageal reflux disease (GERD) symptoms undergoing HRM and pH-impedance or wireless pH study off proton pump inhibitor were prospectively studied between July 2021 and March 2022. After the HRM Chicago 4.0 protocol, patients were requested to elevate 1 leg at 45º for 5 seconds while supine. The SLR maneuver was considered effective when intra-abdominal pressure increased by 50%. IEPs were recorded 5 cm above the lower esophageal sphincter at baseline and during SLR. GERD was defined as AET greater than 6%.

    RESULTS: The SLR was effective in 295 patients (81%), 115 (39%) of whom had an AET greater than 6%. Hiatal hernia (EGJ type 2 or 3) was seen in 135 (46%) patients. Compared with patients with an AET less than 6%, peak IEP during SLR was significantly higher in the GERD group (29.7 vs 13.9 mm Hg; P < .001). Using receiver operating characteristic analysis, an increase of 11 mm Hg of peak IEP from baseline during SLR was the optimal cut-off value to predict an AET greater than 6% (area under the receiver operating characteristic curve, 0.84; sensitivity, 79%; and specificity, 85%), regardless of the presence of hiatal hernia. On multivariable analysis, an IEP pressure increase during the SLR maneuver, EGJ contractile integral, EGJ subtype 2, and EGJ subtype 3, were found to be significant predictors of AET greater than 6% CONCLUSIONS: The SLR maneuver can predict abnormal an AET, thereby increasing the diagnostic value of HRM when GERD is suspected.

    CLINICALTRIALS: gov ID: NCT04813029.

    Matched MeSH terms: Leg/pathology
  14. Naeem J, Hamzaid NA, Azman AW, Bijak M
    Biomed Tech (Berl), 2020 Aug 27;65(4):461-468.
    PMID: 32304295 DOI: 10.1515/bmt-2019-0191
    Functional electrical stimulation (FES) has been used to produce force-related activities on the paralyzed muscle among spinal cord injury (SCI) individuals. Early muscle fatigue is an issue in all FES applications. If not properly monitored, overstimulation can occur, which can lead to muscle damage. A real-time mechanomyography (MMG)-based FES system was implemented on the quadriceps muscles of three individuals with SCI to generate an isometric force on both legs. Three threshold drop levels of MMG-root mean square (MMG-RMS) feature (thr50, thr60, and thr70; representing 50%, 60%, and 70% drop from initial MMG-RMS values, respectively) were used to terminate the stimulation session. The mean stimulation time increased when the MMG-RMS drop threshold increased (thr50: 22.7 s, thr60: 25.7 s, and thr70: 27.3 s), indicating longer sessions when lower performance drop was allowed. Moreover, at thr70, the torque dropped below 50% from the initial value in 14 trials, more than at thr50 and thr60. This is a clear indication of muscle fatigue detection using the MMG-RMS value. The stimulation time at thr70 was significantly longer (p = 0.013) than that at thr50. The results demonstrated that a real-time MMG-based FES monitoring system has the potential to prevent the onset of critical muscle fatigue in individuals with SCI in prolonged FES sessions.
    Matched MeSH terms: Leg
  15. Hazwani Ahmad Yusof, Rabinderjeet Singh, Zainuddin Zafarina, Kieron Rooney, Ahmad Munir Che Muhamed
    MyJurnal
    The purpose of this study was to examine the effect of the ACE I/D gene polymorphism on athletic status and physical performance of well-trained Malaysian athletes. The distribution of ACE I/D gene polymorphism among 180 well trained athletes was compared with 180 sedentary controls. 20 meter Yo-Yo intermittent recovery and leg strength tests were used to measure maximal oxygen consumption (VO2max) and leg strength value of athletes with different ACE I/D genotype, respectively. Chi-Square and one way ANOVA tests were used for data analysis. The II and DD genotype were more prevalent among the endurance athletes and the strength/ power athletes compared to the other groups, respectively (p=0.00). The VO2max was not significantly associated with ACE genotype in athlete (p=0.828). However, athletes with the DD genotype had recorded a greater result for leg strength (113.8 ± 36.2) than those with the II (96.2 ± 28.0) and the ID (112.2 ± 33.5) genotype (p=0.047). This study supports the notion that ACE I/D gene polymorphism might be a genetic factor associated with athletic status and strength performance among the Malaysian population. Future studies with more representation of endurance athletes might able to detect the association between I allele and endurance performance.
    Matched MeSH terms: Leg
  16. Afizudin Idrus, Nur Ikhwan Mohamad
    MyJurnal
    The purpose of this study was to determine the relationship between supporting leg strength and supporting leg balance; and their correlation with kicking performance. Thirty four recreational male futsal players with a mean age 23.2±1.5 years old voluntarily participated in this study. Physical characteristics of participants (age, weight, height and body mass index) were recorded prior to test. Force platform was used to record kinetics variables during maximal instep kick (with and without target) and during the Balance Stork Test. Ball flight after impact with the kicking foot was recorded using high speed video camera set at 120 frame per second, with 500 hertz shutter speed. Ball velocity was then calculated using motion analysis software. Pearson correlation was used to determine the relationship between variables. Results indicated no significant correlation between maximal vertical force (max-vGRF) with the ball velocity for both condition of kicks; between strength (max-vGRF) and balance (at 95% ellipse area) of supporting leg; between supporting leg balance and ball velocity; between supporting leg balance and ball accuracy. However, negative significant correlations exist between max-vGRF and ball accuracy. Max-vGRF and ball velocity for both kicking without target and kicking with target was found highly correlated. As a conclusion, kicking performance was not primarily influenced by either the supporting leg strength (MVF) or supporting leg balance (95% ellipse area).
    Matched MeSH terms: Leg
  17. Ahmad Naim Ismail
    Movement Health & Exercise, 2012;1(1):39-48.
    MyJurnal
    The increase in weight-lifting performance after resistance training is greater than the increase seen in maximal voluntary isometric contraction (MVC). This discrepancy has been attributed to learning and coordination. The purpose of the present study was to look into the contribution of joint angle specificity, and the specificity of the movement at various speeds in explaining the disproportionate increase in weightlifting strength compared to isometric strength. Eighteen participants completed the study. The quadriceps muscle group of each individual was trained unilaterally on a leg extension machine. Participants performed four sets of ten lifts at a steady pace. A load of 80% of the maximum load (1RM) was prescribed. The MVC of the quadriceps was measured on a strength-testing chair. The length-tension relationship was measured isometrically at 600, 750, 900, and 1050 of knee flexion. Measurement of isokinetic strength at velocities of 450/s, 1800/s and 300/s were made. All measurements were made before and after the training. The eight weeks training resulted in a 33% increased in weights lifted (p < 0.05) that was significantly greater than the gain in isometric MVC (6%). Significant gains in isometric strength were seen at all the joint angle but with no evidence of length specificity. Although there were significant gains in strength at higher velocities, they were not sufficient to explain the increased weight-lifting performance and, in any case, similar gains were seen with the untrained leg where no improvement in weight-lifting
    performance was seen. From the findings it is concluded that angle and velocity specificity could not fully account for the discrepancy between gains in weight-lifting performance compared to isometric strength.
    Matched MeSH terms: Leg
  18. Yusof MI, Sulaiman AR, Muslim DA
    Singapore Med J, 2007 Aug;48(8):729-32.
    PMID: 17657379
    INTRODUCTION:
    Many conditions, including benign and malignant tumours, peripheral vascular diseases and open fracture grade 3C, have been successfully treated with limb sparing procedures. However, the same could not be said for treatment of limb infection, especially late stage diabetic foot complications.

    METHODS:
    This is a retrospective review of patients who underwent operations at our hospital from July 2003 to June 2005. All patients who underwent various types of limbs amputations were included. The cohort was divided according to the diagnosis leading to the amputation and the level of amputation. The number and levels of amputation were then compared with the various causes leading to the amputation.

    RESULTS:
    There were 203 patients who underwent amputation during the period of study. 135 (66.5 percent) of the patients were diabetic and amputations performed were related to diabetic foot conditions. 68 (33.5 percent) patients were not known to have diabetes mellitus. Among nondiabetic patients, 54 (26.6 percent) amputations were due to trauma, 11 (5.4 percent) were related to musculoskeletal tumours and 3 (1.5 percent) were due to peripheral vascular disease. Among diabetic patients, 23 (17 percent) patients underwent above knee amputation, 44 (33 percent) patients underwent below knee amputation, and 68 (50 percent) patients underwent local foot amputation. 80 of 135 (59.3 percent) patients, who underwent amputation due to diabetic complications, were less than 60 years old.

    CONCLUSION:
    Good diabetic control and detection of early diabetic foot complications will reduce the number of patients undergoing limb amputation as well as the number of amputees. Since the incidence of lower limb amputation is due mainly to poor diabetic control, it is important to protect this group of patients from a probable avoidable amputation.
    Matched MeSH terms: Leg/surgery; Leg Injuries/surgery
  19. Sadeghi H, Jehu DA, Daneshjoo A, Shakoor E, Razeghi M, Amani A, et al.
    Sports Health, 2021;13(6):606-612.
    PMID: 33583253 DOI: 10.1177/1941738120986803
    BACKGROUND: Poor muscle strength, balance, and functional mobility have predicted falls in older adults. Fall prevention guidelines recommend highly challenging balance training modes to decrease falls; however, it is unclear whether certain modes are more effective. The purpose of this study was to determine whether traditional balance training (BT), virtual reality balance training (VR), or combined exercise (MIX) relative to a waitlist control group (CON) would provoke greater improvements in strength, balance, and functional mobility as falls risk factor proxies for falls in older men.

    HYPOTHESIS: We hypothesized that 8 weeks of MIX will provoke the greatest improvements in falls risk factors, followed by similar improvements after BT and VR, relative to the CON.

    STUDY DESIGN: Single-blinded randomized controlled trial NCT02778841 (ClinicalTrials.gov identifier).

    LEVEL OF EVIDENCE: Level 2.

    METHODS: In total, 64 community-dwelling older men (age 71.8 ± 6.09 years) were randomly assigned into BT, VR, MIX, and CON groups and tested at baseline and at the 8-week follow-up. The training groups exercised for 40 minutes, 3 times per week, for 8 weeks. Isokinetic quadriceps and hamstrings strength on the dominant and nondominant legs were primary outcomes measured by the Biodex Isokinetic Dynamometer. Secondary outcomes included 1-legged stance on firm and foam surfaces, tandem stance, the timed-up-and-go, and gait speed. Separate one-way analyses of covariance between groups were conducted for each outcome using baseline scores as covariates.

    RESULTS: (1) MIX elicited greater improvements in strength, balance, and functional mobility relative to BT, VR, and CON; (2) VR exhibited better balance and functional mobility relative to BT and CON; and (3) BT demonstrated better balance and functional mobility relative to CON.

    CONCLUSION: The moderate to large effect sizes in strength and large effect sizes for balance and functional mobility underline that MIX is an effective method to improve falls risk among older adults.

    CLINICAL RELEVANCE: This study forms the basis for a larger trial powered for falls.

    Matched MeSH terms: Leg
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