In view of the poor effect of badminton players’ physical fitness and response training, this paper puts forward the construction method of badminton players’ pace training model based on big data, constructs badminton players’ pace training index by combining big data technology, optimizes the pace training evaluation algorithm, and puts forward the corresponding Badminton Players’ pace training method to achieve the model design goal. Finally, experiments show that the badminton athlete’s pace training model based on big data has high practicability in the process of practical application and fully meets the research requirements.

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Research on Badminton Player’s Step Training Model Based on Big Data and IoT Networks

The majority of people with muscle weakness or paralysis lose their ability to walk and require various assistive devices like a walker to walk. Although various studies have examined the effect of different types of anterior and posterior walkers on different walking variables, so far no studies compare anterior versus posterior walker on forces and torques applied to the lower extremities. This paper presents a novel approach of using a passive saddle-assistive device (S-AD) to investigate the effect of this device on the torques of the joints. To measure the effectiveness of the device, a volunteer with spinal cord injury (SCI) participated to walk in four modes; including the use of a standard walker, anterior, and posterior mobility S-AD with and without body weight support, in the gait laboratory. The forces and torques applied to the lower and upper limbs were measured and examined. The result demonstrated a reduction in the vertical force on the lower limb in the anterior S-AD in supporting the patient’s weight compared to the standard walker up to 42.8% and to the posterior S-AD with weight support up to 12%. According to the results, the anterior S-AD has a greater effect compared to posterior S-AD and standard walkers on lower and upper limb torque and forces during walking of a SCI patient while using knee ankle-foot orthoses.

Comparison of anterior and posterior wheeled walkers based on body weight support in improving gait function a subjects with spinal cord injury: A case study

ABSTRACT Introduction: Chinese martial art has a wide and deep history, and its routine passes are a particular artistic presentation. In exhibitions, choreography with jumping is highly appreciated. Empirically, it is believed that additional strengthening of the lower limbs may promote better results in the performances, but there are no reports in the scientific literature about such a statement. Objective: Verify the consequences of lower limb strength training on jumping ability in martial arts athletes. Methods: 30 first and second tier athletes from the professional women’s team of the Wushu Sports Management Center and Sports Bureau were selected as volunteers for the experimental research. The experiment lasted for three months. The characteristics of the development and change of strength of each muscle group in the knee joint of the athletes’ lower limb during the experimental training were detailed, and the commonly used means of lower limb strength training were found. Results: In strength training, the best means found were skipping steps and rapidly changing direction. The correlation coefficient between jumping and strength was 0.75. Conclusion: After the experiment, the maximum torque and the average power of the lower limb knee muscle groups of the three experimental groups increased in different ranges, which shows that the strength quality of the knee joint of the athletes increased during the suggested training. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

Consequences of lower limb strength training on jump performance in athletes of martial arts

The Effect of Saddle-Assistive Device on Improving the Gait Parameters of Patients with the Lower Limbs Weakness: A Pilot Study

Physical problems caused by fractures, aging, stroke, and accidents can reduce foot power; these, in the long term, can dwindle the muscles of the waist, thighs, and legs. These conditions provide ...

Improving sit-to-stand transition by the saddle-assistive device in the spinal cord injury: A case study.

The majority of the people with incomplete spinal cord injury lose their walking ability, due to the weakness of their muscle motors in providing torque. As a result, developing assistive devices to improve their conditionis of great importance. In this study, a combined application of the saddle-assistive device (S-AD) and mechanical medial linkage or thosis was evaluated to improve the walking ability in patients with spinal cord injury in the gait laboratory. This mobile assistive device is called the saddle-assistive device equipped with medial linkage or thosis (S-ADEM). In this device, a mechanical orthosis was used in a wheeled walker as previously done in the literature. Initially, for evaluation of the proposed assistive device, the experimental results related to the forces and torques exerted on the feet and upper limbs of a person with the incomplete Spinal Cord Injury (SCI) during walking usingthe standard walker were compared with an those obtained from using the S-ADEM on an able-bodied subject. It was found that using this combination of assistive devices decreases the vertical force and torque on the foot at the time of walking by 53% and 48%, respectively compared to a standard walker. Moreover, the hand-reaction force on the upper limb was negligible instanding and walking positions usingthe introduced device. The findings of this study revealed that the walking ability of the patients with incomplete SCI was improved using the proposed device, which is due to the bodyweight support and the motion technology used in it.

Using a saddle-assistive device equipped with mechanical orthosis for walking of the person with incomplete spinal cord injury.

Abstract Because of the hard grind of some metals such as aluminum, copper and brass, burnishing can be very effective. Burnishing is a non-cutting process in which the surface of the workpiece is plastically deformed by hard work and pressure in the surface layers of the workpiece. In this study, the burnishing process is applied to 2024 aluminum alloy to improve the quality of the final surface and its increasing hardness. In this process, a roller-based tool was used for burnishing with the lathe. The parameters of spindle speed, feed rate and burnishing force were used in three stages, with two repetition phases and in the full factorial method in aluminum 2024 burnishing. Minitab software was used to determine the effects of the different parameters on surface roughness and hardness. Also, the regression method was used to predict the surface roughness and hardness under the influence of the parameters. The results showed that the optimum surface roughness (Ra = 0.05µm) was achieved at a feed rate of 0.11mm/rev, a spindle speed of 1000rpm, and a burnishing force of 1000N. 

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Akbar Hojjati Najafabadi

Papers

The Effect of Saddle-Assistive Device on Improving the Gait Parameters of Patients with the Lower Limbs Weakness: A Pilot Study

Improving sit-to-stand transition by the saddle-assistive device in the spinal cord injury: A case study.

Using a saddle-assistive device equipped with mechanical orthosis for walking of the person with incomplete spinal cord injury.

Development of the Burnishing Process: Moving Towards Increasing the Quality and Surface Hardness of Aluminum alloy 2024