Infrared thermographic imaging (IRTG) is a safe and reliable technology used to monitor skin temperature. The main aim of our study was to evaluate the relationship between skin temperature changes and muscle fatigue in order to answer the main research question if IRTG can be used to monitor muscle fatigue. This was a case study performed on a 23-year-old trained middle distance runner. After warm-up the subject was exercising on the dynamometer for 7.5 min at 120°/s performing only concentric contractions of quadriceps. At the same time IRTG recording of both (exercising and non-exercising) quadriceps was performed. A correlational analysis that was performed in order to quantify the relationship between power and temperature change over time has shown that there is a significant negative correlation between skin temperature increase and power decrease (r = -0.543, p = 0.036) of exercising quadriceps. In linear regression model the exercising quadriceps power could be predicted from skin temperature. No such relationships were noted for the non-exercising limb that served as a control. We believe that correlation between skin temperature change and muscle power output as described in this case study deserves further analysis on the larger sample including subjects of the different ages, health status, and physical abilities in order to create a new tool for monitoring the muscle fatigue.
COBISS.SI-ID: 4773553
Alpine skiing is known to be associated with high rates of injury. This study aim was designed to examine whole-body vibrations connected with different types of skiing and the associated potential risk of developing low back pain. Eight highly skilled ski instructors equipped with five accelerometers and a GNSS to measure vibrations and speed, respectively, performed six different forms of skiing: straight running, plowing, snow-plow swinging, basic swinging, short swinging, and carved turns. To estimate exposure to periodic, random and transient vibrations the power spectrum density (PSD) and standard ISO 2631-1:1997 parameters [i.e., the weighted root-mean-square acceleration (RMS), crest factor, maximum transient vibration value and the fourth-power vibration dose value (VDV)] were calculated. Ground reaction forces were estimated from data provided by accelerometers attached to the pelvis. The major novel findings were that all of the forms of skiing tested produced whole-body vibrations, with highest PSD values of 1.5-8 Hz. Intensified PSD between 8.5 and 35 Hz was observed only when skidding was involved. The RMS values for 10 min of short swinging or carved turns, as well as all 10-min equivalent VDV values exceeded the limits set by European Directive 2002/44/EC for health and safety. Thus, whole-body vibrations, particularly in connection with high ground reaction forces, contribute to a high risk for low back pain among active alpine skiers.
COBISS.SI-ID: 5270449
This paper focuses on the relationship between sport, national identity and the media in the postsocialist nation-states of Croatia and Slovenia. It describes what has changed during the eight years since Jakov Fak, a Croatian-born Slovenian biathlete, changed his citizenship and began competing for the Slovenian national team. Public was provoked by and exposed to national symbolism, especially in political discourse. The media discourse did change between 2012 and 2018, and discourse typical of civic nationalism began to dominate. Two types of nationalism are mixed in a post-socialist context.
COBISS.SI-ID: 5462449
According to our knowledge our study was the first that showed that the hypoxia-induced decrement in submaximal exercise performance at a simulated altitude of 3 000 m does not seem to be significantly different betweenadults and children. This aspect is especially important in light of families with small children that are acutely exposed to hypoxia when traveling from lowland to higher altitudes for skiing.
COBISS.SI-ID: 5121457
Expert modeling is an approach in which different knowledge and experience is collected, evaluated and organized in a user-friendly manner. In the introduction of the scientific monograph, information is presented in the field of professional modeling in sports, where the system of development of the athlete is presented. The direction of evaluating the performance model of the tennis player is written in accordance with the theory of sports training, where various questions arise. We were interested in what skills, skills, qualities and characteristics of a tennis player affect their outcome. In addition, what is the impact of each dimension on the achievement and what are the interrelationships between them. We also defined the measurement procedures for measuring and controlling certain abilities, characteristics and properties. The data presented has been collected over the past 25 years in the field of competitive tennis. On the basis of this data, a model of performance of young tennis players has been built and presented and statistical methods tested.
COBISS.SI-ID: 12277577