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* Akademik Arşiv

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    Article
    Citation - WoS: 1
    Citation - Scopus: 3
    The Effects of High-Intensity Interval Training in Cases with Anterior Cruciate Ligament Reconstruction
    (Georg Thieme Verlag Kg, 2024) Akaras, Esedullah; Atalay Guzel, Nevin; Kafa, Nihan; Yagiz, Goekhan; Odluyurt, Mustafa; Ataoglu, Muhammet Baybars
    Objective This study aims to investigate the effects of six weeks (three times a week) Wingate style high-intensity interval training (HIIT) on strength, proprioception, flexibility, laxity, performance, and body composition in subjects who have undergone anterior cruciate ligament (ACL) reconstruction with the hamstring autograft method.Material and Methods Within the scope of the study, 29 volunteers who had undergone hamstring autograft ACL reconstruction at least six months ago were randomized and divided into two groups HIIT (n=15) and control (n=14) groups. After the initial assessments, the Wingate style HIIT was applied to the experimental group three days a week for six weeks. The control group continued their normal lifestyle and exercise habits. After six weeks, final evaluations were made. After obtaining the subjects' demographic information, body composition was measured with Tanita. Then, knee laxity measurement with GNRB arthrometer, 30(degrees) and 60(degrees)proprioception assessed with an isokinetic dynamometer, muscle strength (quadriceps femoris, hamstring (concentric/eccentric) at 60(degrees)/sec and endurance measurements at 180(degrees)/sec were performed respectively. Sit and reach test for flexibility and performance (single leg jump, vertical jump, agility) parameters were measured.Results According to the findings, significant decrease in body composition (p 0.005), 180(degrees)/sec endurance strength increase (p > 0.005), and flexibility (p > 0.005) did not occur in the quadriceps and hamstring muscles better than control group.Conclusions With these results, it is thought that HIIT can be added to current physiotherapy programs as it provides positive enhancements in body composition, restoring muscle strength, operated side proprioception, and increasing performance parameters without increasing knee laxity after ACL reconstruction.
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    Citation - WoS: 4
    Citation - Scopus: 4
    A Numerical Perspective for CFRP-Wrapped Thin-Walled Steel Cylinders
    (Ernst & Sohn, 2023) Aydin, Abdulkadir Cuneyt; Maali, Mahyar; Kilic, Mahmut; Bayrak, Baris; Akarsu, Oguzhan
    The failure of steel cylindrical shells with carbon fiber-reinforced polymers (CFRP) under hydrostatic pressure is studied in this article by experimental tests and the finite element method. Simulations were performed for 12 cylindrical shells with different dent numbers, dent depths, and two perfect models with and without CFRP. The finite element models are built to simulate the buckling behavior. The nonlinear stabilization method is preferred to simulate the buckling behavior. The finite element results agree well with the corresponding experimental tests and theories. A parametric study is conducted, and the number, depth, width of dents, and the effects of CFRPs on the critical buckling pressure are discussed. The dents are placed symmetrically around the cylinder with a thickness of t(c) (thickness of cylinder) and 2t(c) mm. The initial and overall buckling load decreased with increasing amplitude for dent numbers with different dent depths on all models. The results show that the number and depth of dents generally have a negative effect on the buckling strength, while CFRPs increase the critical buckling strength and are effective in repair as a retrofitting concept.