İstanbul Galata Üniversitesi Kurumsal Akademik Arşivi
DSpace@Galata, İstanbul Galata Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Double product reserve is associated with waist circumference but not body mass index in overweight or obese individuals
(2024) Yiğit, Şafak; Akıncı, B.; Çalıkoğlu, F.; Satman, I.
Background Obesity is an independent risk factor for cardiovascular disease (CVD). Excessive accumulation of adipose tissue in the myocardium leads to structural and functional changes. Body mass index (BMI) is a parameter used to classify overweight and obesity, but it does not distinguish fat-free mass from fat mass and cannot be used to assess body fat distribution. Recent research suggests that abdominal obesity, as measured by waist circumference, is a risk factor for CVD independent of BMI. Purpose In this study, we aimed to investigate the relationship between double product (DP) reserve as a marker of cardiac workload and body composition in overweight and obese individuals. Methods One hundred and forty-one overweight or obese individuals aged 35-65 years (F:105, M:36, mean age=51.48±7.41/years) were included. Body composition (BMI, (mean±SD=35.61±23.31 kg/m2), waist circumference, body fat percentage, waist/hip ratio) was measured. DP was calculated according to the 6-minute walk test (6MWT), which is a submaximal exercise test to estimate myocardial work. It was calculated by multiplying heart rate (HR) by systolic blood pressure (SBP) at rest and after completion of the 6 MWT. DP reserve was calculated as the difference before and after 6MWT. Results DP reserve was not significantly different according to obesity classification (p=0.210, eta-squared=0.032, 95% CI=0.00-0.09) (Table1). DP reserve showed a weakly correlation with waist circumference (r=0.188, p=0.026). No significant relationship was observed between DP reserve and BMI, waist-to-hip ratio and body fat percentage (p>0.05). Conclusion The results of this study showed that cardiac workload estimated with DP reserve was associated with abdominal obesity but not with other body composition parameters. This finding can be interpreted as increased cardiac stress after submaximal exercise in subjects with increased waist circumference regardless of BMI or body fat percentage in overweight or obese subjects.
Digital health readiness in people with cardiometabolic diseases in Turkiye: a prior assessment for the feasibility of technology based cardiac rehabilitation programs
(2025) Ekşi, B. Ülker; Çilbir, Çiğdem Emirza; Yiğit, Şafak; Harputlu, Özge Ertan; Kızılkılıç, Ece; Aslan, Göksen Kuran; Akıncı, Buket
Backround
Digital health readiness refers to the development of health services through digital technologies and the ability to use digital technology to meet health needs and is defined as the main determinant of health. Digital access, usage of digital technology, digital literacy and the development of digital health literacy contribute to the improvement of health processes and are thought to be a useful solution against health problems that may arise in the follow-up of cardiometabolic diseases. Participation in rehabilitation programs is significant in the follow-up of cardiometabolic diseases and digital health literacy plays an important role in self-management of the disease and participation in digital cardiac rehabilitation programs.
Purpose
The aim of our study is to examine the results of the digital usage and skills, which assesses digital health readiness and willingness to learn new digital health tools in individuals with cardiometabolic diseases.
Methods
100participants(mean age=52.28±11.99/years,F:55, M:45) aged 20-80 years and diagnosed with cardiometabolic diseases including hypertension, diabetes mellitus, obesity and cardiac diseases were included in the study. The participants' age ranges were categorized as Group1(20-40 ages between), Group2(41-59 ages between), and Group 3 (60-80 ages between) and educational levels were categorized as high school and below, and university and above. Each participant was presented with 20 statements under the headings of digital usage, digital skills, digital literacy, digital health literacy, and an additional category of digital learnability that Digital Health Readiness Questionnaire and was asked to rate them from 1to5.
Results
There was a significant difference between the age groups in the digital usage category of the participants(F=6.89,p=0.002).The significant difference between group1 and group2 (p=0.034)and between group1 and group3(p=0.001)was in favor of group1.No significant difference was found between age groups in the categories of digital usage, digital technology usage, digital literacy, digital health literacy and digital learnability(p>0.05). In digital usage, internet use had the highest participation rate (4.64±0.91),while activity tracker use was found to be the lowest(2.01±1.67).
Conclusion
This study found that participants aged20–40,especially those with higher education levels, were more likely to use digital devices such as smartphones, laptops, and wearable activity trackers. Younger age and higher education were associated with greater digital usage, learnability, and motivation to develop digital skills. Prior assessment results of this study support that promoting digital health literacy in all age groups can increase the prevention, management and rehabilitation of cardiometabolic diseases by improving healthy lifestyles and control of risk factors.
Exploring conceptual framework of the soundscape of Derinkuyu Underground City
(Acoustical Society of America, 2025) Nas, Sezin; Saher, Konca; Mihci, Gürkan
This research aims to facilitate the experience of the cultural heritage of the ancient Derinkuyu Underground City, one of the largest ancient underground cities in the world, through audio-visual virtual reality (VR) representations of past life in the city; with a focus on defining its acoustics characteristics and soundscape of the past. The objective of this particular study is to define the conceptual framework of the soundscape in the Derinkuyu Underground City based on soundscape standards. The focus is on three spaces: the church used for religious ceremonies; the living area for resting; and the kitchen for food preparation and service. The spatial functions of the church, kitchen, and living spaces were analyzed, sound sources were classified, and the acoustic environment was characterized, considering daily tasks, defining sound sources, establishing reverberation time values by measurements and simulations and describing absorption properties of surfaces. The results showed limitations in describing context due to a lack of literature and historical records. The temporal ambiguity, interconnected spaces, and absence of clear boundaries in Derinkuyu Underground City created a timeless environment where the shared soundscape heightened auditory sensitivity, supporting survival and security needs.
Concurrent validity and TEST-RETEST reliability of the incremental shuttle walk TEST in patients with type 2 diabetes mellitus
(Taylor & Francis, 2026) Usul, Melis; Yıldırım, Gülenay; Kayapınar, İlayda; Kuran, Aslan Göksen; Özyılmaz, Semiramis; Tunç, Muhammet
Background: Type 2 diabetes mellitus (T2DM) is a chronic metabolic-endocrine disorder characterized by insulin resistance and relative insulin deficiency. Functional capacity is considered a key determinant of the ability to perform activities of daily living and maintain quality of life, and it is frequently impaired in individuals with T2DM. The Incremental Shuttle Walk Test (ISWT) is a low-cost, externally paced field test used to assess maximal exercise capacity; however, evidence regarding its validity and reliability in individuals with T2DM remains limited.
Objective: Investigate the concurrent validity of the ISWT against the Six-Minute Walk Test (6MWT) and determine its test-retest reliability in individuals with T2DM.
Methods: Twenty-six individuals with T2DM (16 females, 10 males; mean age 56.0 ± 12.02 years) were included. Concurrent validity of the ISWT was assessed by comparison with the 6MWT. Test-retest reliability was evaluated by repeating the measurements after 7 days, provided that participants' clinical condition remained stable. Statistical analyses were performed using SPSS Statistics version 31.
Results: The ISWT demonstrated acceptable-to-good test-retest reliability, with an intraclass correlation coefficient ICC3,1 of 0.778 (95% confidence interval: 0.568-0.893; p < .001). No significant difference was found between the first and second measurements (336.54 ± 102.53 m vs. 323.85 ± 84.95 m; t(25) = 1.032; p = .312), indicating that no statistically significant systematic change was observed between the test and retest assessments. The standard error of measurement (SEM) was 48.3 m, and the minimal detectable change at the 95% confidence level (MDC95) was 134.0 m.
Conclusion: The ISWT demonstrated acceptable concurrent validity with the 6MWT and good test-retest reliability in individuals with T2DM. Therefore, it may be a useful tool for assessing functional exercise capacity and objectively evaluating functional status in clinical practice. However, SEM and MDC values should be carefully considered when interpreting individual changes in this population.Clinical Trials Number NCT06519318.
Perceived organizational support, passion reflected on the field: A quantitative research on coaches working in football academies
(Elsevier, 2026) Siyahtaş, Anıl; İlk, Çağrı; Çelikel, Baha Eng,n; Turaç, Görkem; Duran, Bişlent; Gişler, Cemal
One of the most important roles in the development of children into professional football players belongs to the coaches working in football academies. Therefore, it is thought that the organizational support that coaches, who work under intense performance pressure, perceive from their clubs can have a significant impact on their passion for their work. However, it is anticipated that psychological and motivational factors may also play a significant role in explaining this relationship. The aim of this research is to examine the relationships between perceived organizational support, psychological resilience, job motivation, and job passion among coaches working in the academies of clubs in the Turkish professional football leagues, within the framework of a structural model. The study included 259 volunteer coaches (n = 259; Xage = 41.27; SDage = 11.91). The research model was tested for direct and indirect effects using SPSS PROCESS Macro with a 5000 bootstrap sample. Initially, perceived organizational support was significantly associated with job passion (β = 0.143, p = .021). However, after psychological resilience and job motivation were included as mediators, the direct relationship between perceived organizational support and job passion became non-significant (β = − 0.069, 95% CI [− 0.132, 0.031]). Furthermore, psychological resilience and job motivation jointly showed a significant sequential mediating role in the relationship between perceived organizational support and job passion (B = 0.016, 95% bootstrap CI [0.005, 0.032]). In conclusion, providing organizational support alone does not seem sufficient to increase the passion of academy coaches for their job. Accordingly, it is recommended that practices aimed at strengthening psychological resilience and job motivation be supported to increase coaches' passion for their jobs.
