Ahmad Faizal Salleh
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Ahmad Faizal Salleh
Official Name
Ahmad Faizal, Salleh
Alternative Name
Ahmad Faizal, S.
Salleh, A.
Salleh, Ahmad Faizal
Faizal, S. Ahmad
Mohd Salleh, A. F.
Salleh, A. F.
Salleh, Ahmad Faizal Bin
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  • Publication
    Accelerometer-based physical fatigue assessment in 400 meter running event
    ( 2021-05-03)
    Atiya S.O.
    ;
    Ahmad Faizal Salleh
    ;
    Norasmadi Abdul Rahim
    ;
    Mohammad Shahril Salim
    ;
    Saidatul A.
    ;
    Nurhidayah Omar
    ;
    Hamzah S.
    Monitoring physical fatigue and capacity is important in high-performance environments to optimize the training stimulus and minimize unplanned physical fatigue. For that purpose, accelerometer sensors have emerged as a tool with the potential to measure and reflect changes in runner's acceleration. An accelerometer was used to measure the acceleration patterns which provided an analogue signal that could analyzed further by using different feature extractions. This research was aimed to estimate the location of physical fatigue occurrence in 400 m running. Basically, the experiments were conducted in outdoor track field, 6 subjects were involved, with age ranging between 19-24 years. In this study, two features have been used which are root mean square (RMS) and player load (PL) to indicate fatigue. The obtained results have shown that there were declines in the player load values in the last 150 m of running for most of the subjects which indicate occurrence of physical fatigue. On the other hand, some subjects have tried to save their energy in the 2nd and 3rd 100 m to speed up again in the last 100 m but there were obvious decrements in their player load in 400 m compared to the 1 100 m of running.
  • Publication
    A Review on Magnetic Induction Spectroscopy Potential for Fetal Acidosis Examination
    ( 2022-02-01)
    Halim S.F.A.
    ;
    Zulkarnay Zakaria
    ;
    Pusppanathan J.
    ;
    Anas Mohd Noor
    ;
    Ahmad Nasrul Norali
    ;
    Mohd Hafiz Fazalul Rahiman
    ;
    Muji S.Z.M.
    ;
    Rahim R.A.
    ;
    Engku-Husna E.I.
    ;
    Muhamad Khairul Ali Hassan
    ;
    Muhammad Juhairi Aziz Safar
    ;
    Ahmad Faizal Salleh
    ;
    Mohd Hanafi Mat Som
    Fetal acidosis is one of the main concerns during labor. Currently, fetal blood sampling (FBS) has become the most accurate measurement of acidosis detection. However, it is invasive and does not provide a real time measurement due to laboratory procedures. Delays in diagnosis of acidosis have caused serious injury to the fetus, especially for the brain and the heart. This paper reviews the new technique in diagnosis of acidosis non-invasively. Magnetic Induction Spectroscopy (MIS) has been proposed to be a new device for acidosis detection in recent years. This paper explains the basic principle of MIS and outlines the design specifications and design considerations for a MIS pH probe. It is expected that readers will gain a basic understanding of the development of a MIS pH probe from this review.
  • Publication
    A Literature Review on Occupational Musculoskeletal Disorder (MSD) Among Industrial Workers in Malaysia
    ( 2021-01-01)
    Isa M.S.M.
    ;
    Nurhidayah Omar
    ;
    Ahmad Faizal Salleh
    ;
    Mohammad Shahril Salim
    Occupational musculoskeletal disorders (MSDs) are quite common among industrial workers. Repetitively lifting, bending, pushing, pulling and standing are the major causes to the occupational diseases. The aim of this study is to investigate the occupational musculoskeletal disorders (MSDs) among industrial workers in Malaysia. Data for this study was collected via Science Direct, Google Scholar, IEEE Explore Digital Library, and Scopus for the analysis to the industrial workers in various Malaysia industries from 2010–2019. The results showed manufacturing industry had the highest MSD cases where 40 manufacturing industries were reported in literature. For the body movements, 59 lifting movements were reported and was the most common movement used by the workers to perform their task which might lead to the injuries of body parts particularly on lower back and shoulder. Appropriate intervention is needed to tackle the MSD issues among the workers.
  • Publication
    Effect of muscle on cortical bone layer by finite element modeling
    ( 2021-05-03)
    Mohammad Shahril Salim
    ;
    Jaapar N.F.N.
    ;
    Ahmad Faizal Salleh
    ;
    Ruslizam Daud
    Muscle is one of the important parts of the body as it made up from a bundle of fibrous tissue. The effects of fracture mechanisms of the bone are been studied related with the existing of muscle layer. In order to establish cortical bone with muscle layer, the structure of the base must be relevant and efficient. Therefore, finite element modeling method is an alternative way to study the effect of human fracture mechanisms with and without muscle layer. The aim of this study is to develop two dimensional (2D) model of human cortical bone and muscle layer in linear elastic fracture mechanics (LEFM) and elastic plastic fracture mechanics (EPFM) by using ANSYS APDL applied on three-point bending test. Other than that, Stress Intensity Factor (K) and Strain Energy Release Rate (J-Integral) were analyzed on both 2D models which are cortical bone layer and cortical bone with muscle layer. Two methods were used to evaluate the values of K which are Displacement Extrapolation Method (DEM) and Constrained Integration (CINT) method. The experimental values then been compared with two theoretical expressions for validation purposes. By referring to the values of error for K and J-Integral values in both methods, it is proved that by using CINT method, the model produced smaller error and higher efficiency. By comparing the two models, cortical bone with muscle layer resulted lower K and J-Integral values. It can be concluded that layer of muscle on the cortical bone gives an impact on the crack tip that allow the growth of the crack.
  • Publication
    Differences on kinematic, kinetic and muscle activities between MSD and health groups for different body movements: A literature review
    ( 2023-02-21)
    Isa M.S.M.
    ;
    Nurhidayah Omar
    ;
    Ahmad Faizal Salleh
    ;
    Mohammad Shahril Salim
    The aim of this study is to review the differences on kinematic, kinetic and muscle activity parameters between the musculoskeletal disorder (MSD) group and the healthy group in everyday activities. This paper outlines the existing evidence on the differences of the kinematic, kinetic and muscle activities between participants with MSD and healthy participants during several activities. The search included Google-Scholar, Scopus, Elsevier-Science Direct and IEEE Explore, which next were separated into three categories: kinematic, kinetic and muscle activity parameters. Studies that compared movements between individuals with MSD and healthy participants were included. From the search results, we identified a total of 335 articles, 134 articles were selected. However, as this study focused only on participants with MSD, 113 articles were eliminated because those articles included participants who had injuries or diseases. Thus, the articles with non-MSD related were excluded which resulted with only 21 articles for final review. Based on the review, there were differences between MSD group and healthy group on kinematic, kinetic and muscle activity parameters. The MSD group had significantly greater hip and knee joint angles during walking and the average of all muscles in MSD group was higher than the healthy group.
  • Publication
    Biomechanical and ergonomics study of manual material handling during team lifting activity
    ( 2023-02-21)
    Latib N.L.M.
    ;
    Mohammad Shahril Salim
    ;
    Shahriman Abu Bakar
    ;
    Ahmad Faizal Salleh
    ;
    Nurhidayah Omar
    ;
    Hamzah Abdul Hamid
    ;
    Saidatul Ardeenawatie Awang
    ;
    Kamaruddin A.
    This project focused only on the joint contribution and ground reaction force that took place during the team lifting activity made up of two people. This present study hypothesized that the workplace variables such as the weight of loads, the height of load to be lifted and gender would affect the kinetics and kinematics variables. Eight healthy participants (BMI: 18.5 till 24.9 kg/m2) divided into four team where there are two groups of male and two groups of females with two individuals in each team have performed asymmetric lifting task under four different conditions which are two weights of loads (5 kg and 15 kg) and two level of lifting heights (participant knuckle and elbow height from ground). There are five Oqus cameras motion capture system (Pro Reflex infrared, Qualysis) to capture the participant motion, Qualisys Track Manager (QTM) software had been used to label the markers on participant body while the force plate had been used for data collection of ground reaction force throughout the lifting activities. The data collected from QTM converted into C3D file to be used in Visual 3D software to do bone modelling and analysis on ground reaction force, joint angle and joint moment. The results show that here was a statistically significant interaction between the effect on gender and load on joint angle, p=0.001 for hip. However, there is no statistically significant interaction between gender and load on right and left knee angle. Besides the two-way ANOVA was conducted that examine the effect of gender and load on joint moment. Thus, there is a statistically significant interaction between the effect on gender and load on joint angle, p=0.001 for all joint moment at both elbow and knuckle height. In term of ground reaction force, there was a statistically significant interaction effect between gender and load on the combined dependent variable during to-lift phase at in lifting phase position at elbow height and knuckle height, p=0.001 when using two-way MANOVA. Based on the results of this study, it was concluded that hip joint angle, hip and knee joint moment affected by gender and load while for ground reaction force are influenced by the variables of lifting height, lifting stage, gender and weight of loads.
  • Publication
    Effect of Arm Swing Direction on Forward and Backward Jump Performance Based on Biomechanical Analysis
    ( 2021-11-25)
    Teoh L.M.
    ;
    Hamzah Sakeran
    ;
    Ahmad Faizal Salleh
    ;
    Mohammad Shahril Salim
    ;
    Wan Zuki Azman Wan Muhamad
    ;
    Shapie M.A.M.
    Previous studies have examined the role of arm swing for various types of jumping technique, but none have been found to study about the gender differences in term of the role of arm swing on forward and backward jump. This study aimed to compare the jumping performance between male and female for forward and backward jump. Seven male and seven female subjects performed four trials of forward and backward jump with (FJA, BJA) and without arm swing (FJ, BJ) respectively. Qualisys Track Manager System, EEGO Sports, Visual3D and MATLAB software was used to record and analyze the performance. According to the result, the triceps brachii muscle is the most active muscle compared to other muscles during jumping. The normalized vGRF showed significant correlation with jump height when jumping forward and backward (p<0.01). The arm swing enhanced the jumping performance by increasing the jump height. Males demonstrated greater vGRF and jump height than females. When jump with arm swing, the left knee flexion angle of males increased whereas females decreased. These findings concluded there is different between males and females during jumping.
  • Publication
    Influence of Carrying Unstable Load on Thoracic Kinematics While Walking on a Curved Path
    ( 2021-11-25)
    Ngoc D.K.
    ;
    Ahmad Faizal Salleh
    ;
    Mohammad Shahril Salim
    ;
    Nurhidayah Omar
    ;
    Basarrudin K.S.
    ;
    Hamzah Sakeran
    ;
    Halim I.
    ;
    Usman J.
    ;
    Lim C.C.
    This study investigated the effect of carrying unstable load on thoracic kinematics while walking on a curved path. Three-dimensional spinal kinematics were defined as the rotations between thoracic and the Virtual laboratory coordinate system (Tho/ Virtual lab) which consisted of lateral bending (LB), flexion/extension (FE) and axial rotation (AR) in the frontal plane, sagittal plane and transverse plane, respectively. Eight healthy young adults (4 males and 4 females) performed loads carrying and walking on one meter radius curved path. Spinal kinematics was determined at the left leg heel strike and just before the right toe off during the curved path walking. As a result, a significant main effect of load intensity was found only on FE of (Tho/Virtual lab) at both left leg heel strike and right leg toe off. The study concluded that an increase in the load intensity of unstable load from 10% of body weight likely to generate more thorax extension.
  • Publication
    Clinical validation of 3D mesh reconstruction system for spine curvature angle measurement
    ( 2023-02-21)
    Shanyu C.
    ;
    Lim Chee Chin
    ;
    Fook C.Y.
    ;
    Azizan A.F.
    ;
    Vikneswaran Vijean
    ;
    Ahmad Faizal Salleh
    ;
    Shafriza Nisha Basah
    Spine curvature disorders are scoliosis, lordosis, and kyphosis. These disorders are mainly caused by the bad habits of the person during sitting, standing, and lying. There are about 3 to 5 out of 1,000 people who are affected by spine curvature disorder. The current conventional method used for diagnose this disorder, such as radiography, goniometry and palpation. However, these conventional methods require human skills and can be time-consuming, resulting to exhaustion of logistic. Therefore, there is a need to solve this problem by creating a Graphical User Interface (GUI) to analyse the human body posture through the 3D reconstructed model of the person. Hence, 3D map meshing reconstruction of the human body method is proposed. This project divided into three parts, which are the development of the GUI for human posture analysis, clinical validation and posture analysis of the 3D model. The 3D model reconstructed from 3D mapping parameters shows 100% accuracy of the assessed point. The lowest difference of angle for the comparison between clinical method (goniometer) and the GUI for male is (A.Pe) 0.930±0.870 and 1.240±0.860 for female (P.Pe). This finding of 3D model assessment system can be helpful for medical doctor to diagnose patient who have spine problem.
  • Publication
    Effect of Strength and Conditioning Trainings on Lower Limb Muscles Activity of High-Jumping Athletes
    ( 2021-01-01)
    Radzi H.M.
    ;
    Ahmad Faizal Salleh
    ;
    Norasmadi Abdul Rahim
    ;
    Mohammad Shahril Salim
    ;
    Nurhidayah Omar
    ;
    Hamzah Sakeran
    ;
    Nair S.K.
    In recent years, there has been a proliferation of technology and sport science utilized within an athlete’s physical activity and exercise. This study aims to assess the effectiveness of two strength and conditioning exercises, namely, a customized free-weight exercise and plate-loaded machine exercise, on the lower limb muscle activities of the amateur high jumpers. Six amateur high jumpers were divided into two groups, a customized free-weight group and plate-loaded machine group (control group) and performed exercises as instructed by the coach. The EMG signal of the Rectus Femoris and Bicep Femoris muscles were recorded during the exercises. Metronome was used to control the speed of the exercise and it was standardized for all subjects. The harmstring’s cable pull exercise (customized free-weight) triggered Bicep Femoris more compared to the leg curl exercise (plate-loaded exercise). Similarly, in the case of Rectus Femoris muscle, the front squat exercise (customized free-weight exercise) triggered higher muscular activities compared to the leg extension exercise (plate-loaded exercise). In conclusion, the customized free-weight exercise has indicated higher muscle activities compared to the plate-loaded exercise.