Ballistic Movements Research Articles

Sonification of a juggling performance using spatial audio

We developed a new musical instrument by equipping juggling balls with accelerometers, gyroscopes, and WiFi sensors. The system measures acceleration and rotation, allowing us to distinguish between ball movement and static states. We can determine the direction of each throw based on the acceleration data. A movement-driven instrument animates the virtual audio source position based on the throw direction. A different synthesizer is assigned to each ball, resulting in a synesthetic experience. The system integrates the juggling patterns simulator with OSC and MIDI API, allowing real-time rhythm generation and composition.

Coral-like BaTiO3-Filled Polymeric Composites as Piezoelectric Nanogenerators for Movement Sensing.

Piezoelectric nanogenerators have prospective uses for generating mechanical energy and powering electronic devices due to their high output and flexible behavior. In this research, the synthesis of the three-dimensional coral-like BaTiO3 (CBT) and its filling into a polyvinylidene fluoride (PVDF) matrix to obtain composites with excellent energy harvesting properties are reported. The CBT-based PENG has a 163 V voltage and a 16.7 µA current at a frequency of 4 Hz with 50 N compression. Simulations show that the high local stresses in the CBT coral branch structure are the main reason for the improved performance. The piezoelectric nanogenerator showed good durability at 5000 cycles, and 50 commercial light-emitting diodes were turned on. The piezoelectric nanogenerator generates a voltage of 4.68-12 V to capture the energy generated by the ball falling from different heights and a voltage of ≈0.55 V to capture the mechanical energy of the ball's movement as it passes. This study suggests a CBT-based piezoelectric nanogenerator for potential use in piezoelectric sensors that has dramatically improved energy harvesting characteristics.

Effects of collective tactical variables and predictors on the probability of scoring in elite netball

ABSTRACT In netball, understanding the group behaviours and constraints that can influence the probability of scoring can provide information that impacts the outcome of a match. The aim of this study was to model the effects of collective tactical variables and contextual predictors on scoring probability in elite netball. A local positioning system provided player positions of one team throughout seven national-level netball matches. The positions were analysed to provide mean, variability (standard deviation) and irregularity (normalised approximate entropy) for each attack and defence possession (470 and 423, respectively) for the team and positional subgroups (forwards, midcourts and defenders) for 10 collective tactical variables. The effects of collective tactical variables on the probability of scoring were estimated with a logistic-regression version of the generalised linear mixed model, with adjustment for predictor variables; possession duration, score difference, match time, ladder-points difference, and match number. The home team and opposition team displayed a greater probability of scoring when they were able to maintain possession for longer periods of time, extremely short possessions were associated with decreased scoring probability. Lateral dispersion negatively affected the probability of scoring for both teams, indicating it is more favourable to maintain positioning and ball movement in the middle of the court

PROJECTILE MOTION IN A MEDIUM WITH QUADRATIC DRAG AT CONSTANT HORIZONTAL WIND

A classic problem of the motion of a projectile thrown at an angle to the horizon is studied. Air resistance force is taken into account with the use of the quadratic resistance law. The action of the wind is also taken into account, which is considered constant and horizontal (tailwind or headwind). The projectile velocity hodograph equation is used to take into account the effect of wind. Comparatively simple analytical approximations are proposed for the main variables of motion (cartesian projectile coordinates and time). All obtained formulas contain only elementary functions. The proposed formulas are universal, that is, they can be used for any initial conditions of throwing. In addition, they have acceptable accuracy over a wide range of the change of parameters. The motion of a golf ball, a tennis ball and shuttlecock of badminton are presented as examples. The calculation results show good agreement between the proposed analytical solutions and numerical solutions. The proposed analytical formulas can be useful for all researchers of this classical problem.

Retracted: Knee Bending Motion Extraction Algorithm for Ball Motion Image Using Vision Sensor

Retracted: Knee Bending Motion Extraction Algorithm for Ball Motion Image Using Vision Sensor

Dynamic modelling of deep groove ball bearings with different local defects considering skidding and thermal elastohydrodynamic lubrication

The vibration characteristics and skidding behaviour of deep groove ball bearings (DGBBs) are significantly influenced by the evolution of local defects and thermal effects. In previous studies, the influences of skidding and thermal effects were not considered in order to simplify the model of defective bearings. But the presence of skidding and thermal should not be ignored to accurately simulate the operation of bearing. To gain a comprehensive understanding of the operational mechanism of defective bearings, it is crucial to examine the skidding and thermal characteristics of various defect types using dynamic modelling approaches. In this study, the DGBB dynamic model for seven types of defects is established, which considers the self-rotation, rotation, and radial motion of ball, the contact force, ball/cage and ball/raceway skidding, and the effects of thermal elastohydrodynamic lubrication (TEHL). Experimental data from a machine fault simulator test rig is utilized to validate the accuracy of the proposed modelling methods. The results indicate that compound defects (CDs) result in higher vibration amplitudes and more severe skidding phenomena compared to single defects (SDs). Furthermore, compound defects exhibit a greater thermal effect on the oil film in the contact area than SDs, significantly impacting the operational performance of the bearing.

Fast prediction in marmoset reach-to-grasp movements for dynamic prey

Primates have evolved sophisticated, visually guided reaching behaviors for interacting with dynamic objects, such as insects, during foraging.1,2,3,4,5 Reaching control in dynamic natural conditions requires active prediction of the target's future position to compensate for visuo-motor processing delays and to enhance online movement adjustments.6,7,8,9,10,11,12 Past reaching research in non-human primates mainly focused on seated subjects engaged in repeated ballistic arm movements to either stationary targets or targets that instantaneously change position during the movement.13,14,15,16,17 However, those approaches impose task constraints that limit the natural dynamics of reaching. A recent field study in marmoset monkeys highlights predictive aspects of visually guided reaching during insect prey capture among wild marmoset monkeys.5 To examine the complementary dynamics of similar natural behavior within a laboratory context, we developed an ecologically motivated, unrestrained reach-to-grasp task involving live crickets. We used multiple high-speed video cameras to capture the movements of common marmosets (Callithrix jacchus) and crickets stereoscopically and applied machine vision algorithms for marker-free object and hand tracking. Contrary to estimates under traditional constrained reaching paradigms, we find that reaching for dynamic targets can operate at incredibly short visuo-motor delays around 80ms, rivaling the speeds that are typical of the oculomotor systems during closed-loop visual pursuit.18 Multivariate linear regression modeling of the kinematic relationships betweenthe hand and cricket velocity revealed that predictions of the expected future location can compensate for visuo-motor delays during fast reaching. These results suggest a critical role of visual prediction facilitatingonline movement adjustments for dynamic prey.

Vision Controlled Motorised Wheelchair

Abstract: Even in this modern day, it is very difficult for physically challenged people to move from one place to other without others help. To give them an independent feel, a smart eye-controlled system is provided. A novel design of an embedded cardiorespiratory monitoring system for wheelchair users is proposed. This system gets the input from eye. An eye-ball controlled wheelchair is a type of assistive technology designed for individuals with paralysis or limited mobility. The wheelchair is controlled through the movement of the user's eyes, allowing them to navigate the chair without the use of their hands or arms. The system consists of a set of sensors that detect eye movements, a microcontroller that interprets the signals, and a motor controller that translates the signals into movement. The user wears a headset with a camera that tracks the movement of their eyes, which is then relayed to the sensors. The wheelchair can be programmed to respond to different eye movements, such as blinking or sustained gaze in a particular direction. The system is designed to be intuitive and easy to use, with minimal training required. One of the primary benefits of the eye-ball controlled wheelchair is increased independence for individuals with limited mobility. It allows them to move around their environment and interact with others without needing assistance. Additionally, the system is non-invasive and does not require surgery or implants. The movement of the wheel chair will be controlled by these inputs. Depending on this input the wheel chair will move forward, left, right or backward. With the help of this system the user can move independently without others help. It also included with obstacle detection system to ensure the safety for the user. If any obstacle is detected then the indication can be given with the help of LCD.The entire system is composed of a sensor node, and a cloud server. The former is used to obtain continuous vitalsign signals, and the latter processes the sampled signals to estimate the temperature level, implemented in an embedded system to achieve a fully integrated radar system. MATLAB image processing is used to sense the movement of the eye ball’s direction using eye ball sensor (Straight Command, Left/Right Command, Stop Command). The system is cost effective and thus can be used by patients spread over a large economy range

Influence of Maximal Strength on Bench Press and Trunk Rotation in Adapted Shot-put: A Pilot Investigation

PURPOSE: Shot-put is a complex ballistic movement that involves segments’ translational and rotational motions. Its goal is to release the shot at maximum forward velocity (strength) at an angle of approximately 40º (rotation). Considering the adapted shot-put, those two components could be more limited in action. Therefore, the present study aimed to examine the correlations among the one-repetition maximum (1RM) test in the bench press (BP1RM) and trunk rotation (TR1RM) and the throwing distance of the adapted shotput and body composition (Fat mass and Fat-free mass [FFM]), and the throwing distance of the adapted shot-put (TD) and 1RM results.METHODS: Eighteen non-professional athletes were evaluated, and their anthropometric data were obtained (bio-impedance measurements). Afterward, the participants performed the BP1RM and TR1RM exercises. Finally, they performed the adapted shot-put in similar conditions as the official competitions, where three trials of ASP were performed, and the best of these trials were assessed.RESULTS: The results showed a significant relationship between the throwing distance and 1RM results for both exercises (BP1RM (<i>p</i>=.040) and TR1RM (<i>p</i>=.002)) and with the amount of FFM (<i>p</i>=.045). Concerning FFM relationships, the results showed a positive relationship with both 1RM exercises (BP1RM (<i>p</i>=.034) and TR1RM (<i>p</i>=.003)). The Fat Mass results demonstrated an inverse correlation only with BP1RM (<i>p</i>=.035).CONCLUSIONS: The results suggest that physical preparation, including BP1RM and TR1RM exercises, are fundamental to improving adapted shot-put performance. This showed preliminary indicators of which variables may influence the adapted shot-put that might help coaches and athletes to improve their performance. Nevertheless, those results should be carefully considered since the movement evaluated was very complex, especially when performed by participants unfamiliar with them, and because the same analysis included both sexes.

The effect of aerodynamics on table tennis

In the table tennis sport category, the different spin formula of table tennis ball will show different motion state, in which the important physical knowledge that is permeated aerodynamics. Besides the effect of aerodynamics, the balls can obtain different trajectories because of Magnus effect and Bernoulli principle. By using these three mainly professional knowledge, this paper analyzed the forces that the top-spin ball and back-spin ball acquired. What is more, the movement of side spin balls also be introduced through these professional knowledge. In addition to these analysis, 40mm and 38mm table tennis balls are compared in the paper. By using the principle of physical mechanics to reveal the secret and mechanism of the spin of table tennis ball, it provides a theoretical basis for improving the spin skill of table tennis ball.

Humans need only 200 ms to generate posture-specific muscle activation patterns for successful vertical jumps in reaction to an auditory trigger.

It is currently unknown how the central nervous system controls ballistic whole-body movements like vertical jumps. Here we set out to study the time frame of generating muscle activation patterns for maximum-effort jumps from different initial postures. We had ten healthy male participants make a slow countermovement from an upright position and initiate a maximal vertical jump as soon as possible following an auditory trigger. The trigger was produced when hip height dropped below one of three preselected values, unknown in advance to the participant, so that the participant was uncertain about the posture from which to initiate the jump. Furthermore, we determined the ensuing bottom postures reached during jumps, and from these postures had the participants perform maximum-effort squat jumps in two conditions: whenever they felt ready, or as soon as possible following an auditory trigger. Kinematics and ground reaction forces were measured, and electromyograms were collected from gluteus maximus, biceps femoris, rectus femoris, vastus lateralis, gastrocnemius and soleus. For each muscle, we detected activation onsets, as well as reaction times defined as the delay between trigger onset and activation onset. In the jumps preceded by a slow countermovement, the posture from which to initiate the jump was unknown before trigger onset. Nevertheless, in these jumps, posture-specific muscle activation patterns were already released within 200 ms after trigger onset and reaction times were not longer and jump heights not less than in squat jumps from corresponding bottom postures. Our findings suggest that the generation of muscle activation patterns for jumping does not start before trigger onset and requires only about 200 ms.

Embodied latch mechanism of the mandible to power at ultra-high speed in the trap-jaw ant Odontomachus kuroiwae.

Rapid movements of limbs and appendages, faster than those produced by simple muscle contraction alone, are generated through mechanical networks consisting of springs and latches. The latch plays a central role in these spring-loaded mechanisms, but the structural details of the latch are not always known. The mandibles of the trap-jaw ant Odontomachus kuroiwae closes the mandible extremely quickly to capture prey or to perform mandible-powered defensive jumps to avoid potential threats. The jump is mediated by a mechanical spring and latch system embodied in the mandible. An ant can strike the tip of the mandible onto the surface of an obstacle (prey, predator or ground) in order to bounce its body away from potential threats. The angular velocity of the closing mandible was 2.3×104rads-1 (1.3×106degs-1). Latching of the joint is a key mechanism to aid the storage of energy required to power the ballistic movements of the mandibles. We have identified the fine structure of two latch systems on the mandible forming a 'ball joint' using an X-ray micro-computational tomography system (X-ray micro-CT) and X-ray live imaging with a synchrotron. Here, we describe the surface of the inner section of the socket and a projection on the lip of the ball. The X-ray live imaging and movements of the 3D model show that the ball with a detent ridge slipped into a socket and over the socket ridge before snapping back at the groove edge. Our results give insight into the complex spring-latch systems that underpin ultra-fast movements in biological systems.

Can a powered knee-ankle prosthesis improve weight-bearing symmetry during stand-to-sit transitions in individuals with above-knee amputations?

BackgroundAfter above-knee amputation, the missing biological knee and ankle are replaced with passive prosthetic devices. Passive prostheses are able to dissipate limited amounts of energy using resistive damper systems during “negative energy” tasks like sit-down. However, passive prosthetic knees are not able to provide high levels of resistance at the end of the sit-down movement when the knee is flexed, and users need the most support. Consequently, users are forced to over-compensate with their upper body, residual hip, and intact leg, and/or sit down with a ballistic and uncontrolled movement. Powered prostheses have the potential to solve this problem. Powered prosthetic joints are controlled by motors, which can produce higher levels of resistance at a larger range of joint positions than passive damper systems. Therefore, powered prostheses have the potential to make sitting down more controlled and less difficult for above-knee amputees, improving their functional mobility.MethodsTen individuals with above-knee amputations sat down using their prescribed passive prosthesis and a research powered knee-ankle prosthesis. Subjects performed three sit-downs with each prosthesis while we recorded joint angles, forces, and muscle activity from the intact quadricep muscle. Our main outcome measures were weight-bearing symmetry and muscle effort of the intact quadricep muscle. We performed paired t-tests on these outcome measures to test for significant differences between passive and powered prostheses.ResultsWe found that the average weight-bearing symmetry improved by 42.1% when subjects sat down with the powered prosthesis compared to their passive prostheses. This difference was significant (p = 0.0012), and every subject’s weight-bearing symmetry improved when using the powered prosthesis. Although the intact quadricep muscle contraction differed in shape, neither the integral nor the peak of the signal was significantly different between conditions (integral p > 0.01, peak p > 0.01).ConclusionsIn this study, we found that a powered knee-ankle prosthesis significantly improved weight-bearing symmetry during sit-down compared to passive prostheses. However, we did not observe a corresponding decrease in intact-limb muscle effort. These results indicate that powered prosthetic devices have the potential to improve balance during sit-down for individuals with above-knee amputation and provide insight for future development of powered prosthetics.

Numerical simulation using in the preparation process of micron‐sized silica–aluminium composite powders by high‐energy alloying: Building visualisation and guiding preparation

AbstractSilica‐aluminium composite powders are important precursors for the preparation of sealant coatings by supersonic flame spraying. Micron‐scale silica‐aluminium composite powders can be prepared using a planetary ball mill, but powder agglomeration often leads to composite failure. Using relevant modelling software to build the 3D modelling of the ball mill jar, which based on the discrete element method, using the Hertz–Mindlin contact model and after specifying the simulation boundary conditions, the ball mill process was simulated and analysed. Visualise the influence of important process parameters such as frequency, size and diameter of milling balls and ball‐to‐powder weight ratio, and systematically analyse the microscopic morphology and composite condition of the agglomerated and dispersed powders. The results show that the ball motion during the ball milling process is mainly divided into three representative types: ball–ball impact, ball crushing motion against the jar wall and ball–wall impact. The energy transfer efficiency of the milling balls to the powder system is highest when the ratio of the three types of motion is uniform. SEM images and EDS spectra showed that the aluminium powder was sufficiently crushed, with an average particle size below 1 μm. The aluminium powder was uniformly distributed on the surface of the silicon powder, and the particle size of the composite silicon aggregates was sufficiently reduced.

Evidence of a Double Pulse Muscle Activation Strategy in Drummers’ Trunk and Upper Limb Muscles During High-velocity Cymbal Crashes

Background: Playing the drum kit is a physically and cognitively demanding task, and skilled drummers share many such attributes with elite athletes. The ‘double pulse’ muscle activation (DPMA) pattern is a motor control strategy that has been observed in athletes of sports involving ballistic movements (e.g., baseball, golf, Mixed Martial Arts), and is believed to function to increase force transfer to the target. Objective: This study examined the muscle activation patterns of highly skilled drummers for evidence of a DPMA during high-velocity cymbal crashes. Methods: Five drummers were instrumented with electromyography electrodes on the right latissimus dorsi, triceps brachii, erector spinae, rectus abdominis, deltoideus posterior (DP), teres major, extensor carpi radialis, and flexor carpi ulnaris muscles. Six trials of data were collected, including a resting baseline, three maximum voluntary exertions (MVE) consisting of maximal effort cymbal crashes, a drumming pattern that included multiple crashes, and a ‘free-play’ trial. Results: The DPMA waveform was observed in all trials, but only those observed during the MVE trials were confirmed to coincide with the crashing movement via video analysis. The DP muscle – which functions to extend the shoulder joint to crash the stick on to the cymbal – exhibited confirmed DPMAs the most frequently. Conclusion: The extent to which drummers use the DPMA to produce high-velocity cymbal crashes within authentic playing conditions is inconclusive and needs further examination. Future study of the DPMA phenomenon in drummers would benefit from the addition of 3-dimensional motion capture to further understand the purpose of the muscle contractions of the DPMA.

Analisis Konsep Momentum dan Tumbukan pada Permainan Lato-Lato

Clackers are one of the most popular toys in Indonesian society today. There are many physics concepts in this toys that can make clackers as a source of learning physics. The purpose of this research is to examine the concepts of physics, especially the concepts of momentum and collisions in clackers’ games. The method used in this study is a qualitative method with an explanation in the form of descriptive analysis. Literature study and observational analysis were used in this study. This study provides an illustration that every ball's motion in the clackers’ game contains the concept of momentum at each point of its motion and collision when the two balls collide. The results of this study are expected to explain that clackers have the potential as a source of learning physics.

Use of Liver Transplantation for Pure Neurologic Indications in Wilson Disease (P13-11.004)

<h3>Objective:</h3> N/A <h3>Background:</h3> Wilson disease (WD) is a disorder of copper metabolism with broad neuropsychiatric and systemic manifestations. Treatment focuses on copper excretion with chelators, and inhibiting copper absorption. Liver transplantation (LT) is recommended in WD patients with hepatic failure; its use for pure neurologic indication remains controversial.¹ In a retrospective cohort study, patients resistant to decoppering agents underwent LT for pure neurologic indications; 8 of 14 had improved Unified Wilson’s Disease Rating Scale (UWDRS) scores of 80%.² A systematic review of LT for neurologic WD showed that newer studies reported better results of neurologic improvement and better survival rates.³ <h3>Design/Methods:</h3> N/A <h3>Results:</h3> A twenty-two-year-old woman developed upper extremity tremor ten months prior to presentation to our hospital and was diagnosed with essential tremor. Over the following months, she progressed: worsening gait and balance, then ballistic movements of the legs and arms. Further work-up showed low serum ceruloplasmin and brain MRI findings consistent with WD. Chelating therapy was initiated with trientine and zinc, seven months after onset. She suffered further deterioration despite therapy, culminating in status dystonicus, as she presented to our hospital. Her choreic-ballistic and dystonic movements are seen in Video 1. She received symptomatic treatment for dystonia and spasticity. Despite relatively normal liver function, she underwent orthotopic liver transplantation. The patient’s pre-transplantation baseline UWDRS score was 157. Post-transplantation, at 6 months (Video 2), her UWDRS score improved to 74, with improvement in her neurologic symptoms. <h3>Conclusions:</h3> We present a patient who underwent liver transplant for pure neurologic indications with subsequent neurologic improvement despite resistance to chelation. Our case adds to growing evidence that supports the use of LT in patients with pure neurologic manifestations of WD. This may be a reasonable therapeutic option when chelation fails to show benefit. Further studies are needed to determine demographic predictors of post-LT improvement. <b>Disclosure:</b> Dr. Marmol has nothing to disclose. Dr. Feldman has nothing to disclose. Dr. Hislop has nothing to disclose. An immediate family member of Dr. Shpiner has received personal compensation for serving as an employee of University of Miami. Dr. Margolesky has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Alexion . The institution of Dr. Margolesky has received research support from NeuroNext.

Identification of novel compound heterozygous mutation in Niemann-Pick disease type C gene (P14-11.006)

<h3>Objective:</h3> To report a novel compound heterozygous mutation in two siblings with Niemann-Pick disease type C who displayed distinct phenotypic presentation <h3>Background:</h3> Niemann–Pick disease type C (NPC) is a rare autosomal recessive lysosomal storage disease with heterogenous neurological and systemic manifestations. The vast majority of cases (95%) are caused by mutations in the Niemann–Pick C1 protein (NPC1), whereas the reminder of cases are attributed to mutations in Niemann–Pick C2 protein (NPC2). <h3>Design/Methods:</h3> Case report <h3>Results:</h3> <h3>Case 1:</h3> A 57-year-old female presented with a 5-year history of progressive slowness, poor coordination, and cognitive decline. This was followed by generalized stiffness and recurrent ballistic movements within two years of onset. Her poor postural stability lead to frequent falls. Initial neurological evaluation revealed severe dysarthric speech, moderate vertical eye movement limitation, spasticity and exaggerated deep tendon reflexes, along with dystonic movements. She progressed rapidly, developing generalized dystonia which made her bedbound. <h3>Case 2:</h3> the young sibling of case 1, presented at the age of 56 with 8-year history of poor balance. Symptoms were slowly progressive, noted initially with changes in his balance, slurred speech, and poor coordination. He was also noticed to have mild cognitive changes. Examination revealed cerebellar dysarthria, with failure to generate saccades from primary position downwards. Deep tendon reflexes were brisk, with no evidence of muscle wasting, or spasticity. He showed signs of mild axial and appendicular ataxia. The progression was slow, and he maintained his mobility without requiring walking aids. Molecular genetic testing revealed compound heterozygous mutation in the NPC1 gene; c.180G&gt;T (p.Gln60His) and c.3173C&gt;A (p.Ala1058Asp). All biochemical results were within normal range. Brain MRI showed generalized cerebral and cerebellar volume loss few years into the onset of symptoms in both patients. <h3>Conclusions:</h3> Our report highlights the high intrafamilial heterogeneity and poor genotype-phenotype correlation in the case of Niemann–Pick disease type C. <b>Disclosure:</b> Dr. Abusrair has nothing to disclose. Dr. Amorelli has nothing to disclose. Justyna Sarna has nothing to disclose.

AYURVEDIC UNDERSTANDING AND MANAGEMENT OF ISOLATED SIXTH CRANIAL NERVE PALSY DUE TO GIANT ANEURYSM:A CASE REPORT

Isolated sixth cranial nerve palsy occurs due to the dysfunction of the nerve at any point from its transit in the pons to the lateral rectus muscle. The major causes of abducens nerve palsy are increased intracranial pressure, infections, uncontrolled diabetes, aneurysm etc.The etiology in this case is a giant aneurysm in the left cavernus ICA leading to compression of left abducens nerve resulting in binocular horizontal diplopia and restriction in the abduction of left eyeball. The case was diagnosed in Ayurveda considering the cause and the effect as Siragata Vata leading to Timira.The management was mainly focused on addressing the cause.Virechana followed by Yoga basthi along with murdhni taila was adopted in this case. There was signicant improvement in the movement of left eye ball towards the left lateral side and diplopia was completely absent at the time of discharge.

Risk factors of reoperative post anterior cruciate ligament reconstruction

Background: ACL reconstruction (ACLR) is a surgical procedure to graft the ACL using tendon tissue to restore joint fixation and stabilization functions. Rehabilitation management is performed by physiotherapy in ACLR phase III patients to increase strength, balance, and functional motion control of patients with rehabilitation and exercise adaptation interventions. Case Description: On June 09, 2022, the patient was playing basketball, when the patient heard his leg "pop" due to sudden stopping and turning movements while playing basketball. The patient took the initiative to go to the hospital because his leg was painful and was advised to do an MRI, the results of the MRI examination stated that the patient had an ACL and Meniscus rupture. The patient has undergone ACL reconstruction surgery and partial lateral meniscectomy on July 20, 2022, the patient has been doing physiotherapy since the first postoperative day until now entering the 10th week, the patient still feels something is stuck in the knee, and feels that left leg is stiff and weak when moved. Conclusion: There is an increase in ROM measurement results, muscle strength, segment circumference, hamstring and trunk flexibility, functional knee, and decreased pain scale. It is hoped that this case can be used as a reference for providing exercise interventions in patients with ACL postoperative conditions, especially phase III with other comorbidities.