Damir Knjaz's research while affiliated with University of Zagreb and other places

Publications (10)

Article
Full-text available
This study aimed to estimate the effect of the coronavirus disease 2019 (COVID-19) quarantine on low back pain (LBP) intensity, prevalence, and associated risk factors among adults in Riyadh (Saudi Arabia). A total of 463 adults (259 males and 204 females) aged between 18 and 64 years and residing in Riyadh (Saudi Arabia) participated in this cross...
Article
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Background Matrix metalloproteinases (MMPs) play an important role in matrix remodelling, as well as in tendon integrity. Due to overuse, athletes often develop chronic tendinopathies. If not treated, they lead to severe impairment, even complete tendon ruptures.AimThe main purpose of this study was to investigate whether three functional polymorph...
Article
Full-text available
Character of modern tennis game in the last decade has become significantly more dynamic, fast and powerful, which brings high strain to joint and muscular system. The aim of this research was to establish strength level of external and internal shoulder rotators, and to compare the competitive tennis players group of boys (TEN, n=10, aged 12-14 ye...
Article
Full-text available
During pregnancy there are increased biomechanical demands on women affecting gait parameters. The purpose of this study was to analyze changes in vertical ground reaction force (GRF), normalized by body mass, during advancing phases of pregnancy. Nine pregnant subjects participated in this study at three pregnancy stages. To determine in-shoe pres...
Article
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The objective of this study was to establish physiological loads elite basketball referees sustain during competitive games. Thirty-one referees (age: 33.35±5.17 years, body mass: 88.04±7.47 kg, height: 186.37±5.40 cm), all classified as A-list referees of the 1st Croatian Basketball League, were subjected to progressive spiroergometric testing on...
Conference Paper
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The aim of research was to figure out what is teacher's behaviour in cases of excusing pupils from physical education. Teachers involved in sample were teaching 9 and 10 years old children (2nd triennium of primary school). Methods of basic statistics were used. Results showed that the level of excused pupils were low. Pupils who had doctor's excus...
Conference Paper
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Healthy teacher is one of the most important parts of educational process. Different researches have shown that disease of vocal organ and hearing loss are two of the most common diseases among teachers. In article we present results of research where 476 teachers (from Slovenia, Croatia, and Slovakia) were involved. Results showed up that the most...
Article
Nowadays, the importance of nutrition is emphasized frequently, namely because of the increasing number of overweight children and adolescents. As a result, illnesses brought about by being overweight are more evident. Because of the influence that elementary school teachers and physical education teachers have on pupils, we decided to determine th...
Conference Paper
Full-text available
There are many scientifi c evidences linking physical activity to numerous health improvements and substantial benefi ts that can be gained. The aim of this study is to establish the level of habitual physical activity in elementary school teachers. The sample comprises 147 female teachers working with children in the fi rst four classes in element...

Citations

... The literature has reported that confinement due to COVID-19 pandemic has triggered an increase in reports of musculoskeletal pain related to age (between 35 and 49 years), a body mass index higher than 30, being seated long periods of time, and telework (11,12) . Even though before the pandemic it was reported that musculoskeletal disorders represent the main and costliest occupational health problem in school teachers, a study carried out at the beginning of the pandemic with Peruvian university professors found that the prevalence of musculoskeletal disorders was 100%, reporting dorsal lumbar pain as the most frequent and finding an association of these disorders with ergonomic risk factors such as prolonged posture and long working hours (12) . ...
... In a study, Briski et al. examined MMP-3 gene polymorphisms in Croatian high-level athletes and they reported that the MMP-3 rs650108 GG and rs679620 AA genotypes were over-represented in athletes compared to controls. Their results highlight an association among the risk of tendinopathies and functional variants within the MMP-3 gene in high-level athletes (13). Nie at al. found in their study that the MMP-3 gene rs679620 variant was associated with chronic Achille tendon risk in the Chinese study group (14). ...
... With regards to handedness, a few percentages of players (3.6% among male and female) who play with the opposite hand to that used for tasks like writing could be, mainly due to sport-specific tasks (or sport-specific dominance), benefit from this advantage on the court (cross-dominance). So, while in some cases being left-handed could be disadvantageous in the competition (regulations, equipment, etc.), in some fast and quick sports such as tennis, left-handers are considered having more chance to success because of their weaker brain lateralization for specific tasks (Lawler & Lawler, 2011;Loffing et al., 2016;Vodička et al., 2018). This is also because laterality has been regarded as one of the significant factors for developing the talent (Sterkowicz, Lech, & Blecharz, 2010), considered inherited and developed through infancy (Kubota & Demura, 2011). ...
... Th is is also a growing opportunity to act as a medium through which to engage young people in immediate, attractive and increasingly personalized ways (Greenhow & Lewin, 2016;Selwyn & Stirling, 2016). Applying new technologies in teaching PE and at school settings is considered to be a possible means of teachinglearning process effi ciency and of forming the children' relationship with physical activities, and therefore their performance both in and out of PE (Arnett & Lutz 2003;Štemberger, Knjaz & Tománek, 2011;McKenzie et al., 2013;Cardon et al. 2012;Lee, Burgeson, Fulton & Spain, 2006;Bendíková & Pavlovič, 2013). ...
... The mechanisms underlying diverse alterations in the gait pattern during pregnancy are controversially discussed in the literature. According to Gimunova (2015), decreases in gait velocity are assumed to reflect the protection of the fetus against extensive concus-sions and shaking. Other authors (Bird et al., 1999;Bertuit et al., 2015;Branco et al., 2014;Forczek and Staszkiewicz, 2012;Lymbery and Gilleard, 2005;Blaszczyk et al., 2016) suggest a compensatory mechanism in order to reduce energy costs. ...
... Similar results as in this research were obtained in study conducted on basketball referees (32) where authors presented the average heart rate during all four periods of basketball match (including active and passive game time) was 139.63±9.19 beats per minute which is 74.86±4.57% of the maximum heart rate and 82.09±5.78% of the heart rate at the anaerobic threshold. ...