Browsing by Subject "Endurance"

Now showing 1 - 5 of 5
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    Do novice and experienced rowers adopt diferent pacing strategies and do their physiological and metabolic responses show optimisation?
    (Universidad de Murcia, 2018) Smith, Lee; Towner, April; Gordon, Dan; López Sánchez, Guillermo Felipe; Díaz Suárez, Arturo
    The aim was to evaluate the pacing strategies and metabolic and physiological responses of novice and experienced rowers, over a 2000m racing proile. he sample was composed of 7 male university and town boat club rowers, 5 of which were novice (age 22.4±2.6 yr, height 182.6±8.4 cm, mass 79.7±8.9 kg), and 2 experienced (age 23.0±4.2 yr, height 194.1±4.1 cm, mass 90.3±2.0 kg). All participants performed a 2000m racing proile on the rowing ergometer followed by 3 trials in randomised order (500m, 1000m, 1500m) at the stroke rate and split time set from the original 2000m test. he last session consisted of a O2max test. During these tests, gas exchange, haematology, heart rate, split times, stroke rate and distances were recorded. Blood lactate (BLa) accumulation in novice rowers was continuously increased and plateaued in the inal 500m quarter. Whereas, experienced rowers gradually increased in lactate accumulation, but maintained in the third quarter (1000-1500m) which allowed room for further accumulation in the inal quarter (1500-2000m). he volume of oxygen uptake ( O2 ) increased linearly until the inal 500m quarter for the experienced group, while novice rowers luctuated throughout the time trial. In terms of pacing, the novice rowers followed an expected “allout” strategy whereas, unexpectedly, the experienced rowers continuously dropped in speed until the mid-point (1000m) where they maintained a speed of 5.10m. s -1. he current indings suggest that at a physiological and metabolic level, the experienced rowers are more adapted to the demands of rowing a 2000m race. However, it appears that they do not always follow a “J-Shaped” strategy.
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    Dopaminergic Modulation of Forced Running Performance in Adolescent Rats: Role of Striatal D1 and Extra-striatal D2 Dopamine Receptors
    (Springer, 2021-01-04) Toval, Angel; Garrigos, Daniel; Kutsenko, Yevenhiy; Morales-Delgado, Nicanor; Tseng, Kuei I.; Ferrán Bertone, José Luis; Ribeiro do Couto, Bruno; Popovic Popovic, Miroljub; Anatomía Humana y Psicobiología
    Improving exercise capacity during adolescence impacts positively on cognitive and motor functions. However, the neural mechanisms contributing to enhance physical performance during this sensitive period remain poorly understood. Such knowledge could help to optimize exercise programs and promote a healthy physical and cognitive development in youth athletes. The central dopamine system is of great interest because of its role in regulating motor behavior through the activation of D1 and D2 receptors. Thus, the aim of the present study is to determine whether D1 or D2 receptor signaling contributes to modulate the exercise capacity during adolescence and if this modulation takes place through the striatum. To test this, we used a rodent model of forced running wheel that we implemented recently to assess the exercise capacity. Briefly, rats were exposed to an 8-day period of habituation in the running wheel before assessing their locomotor performance in response to an incremental exercise test, in which the speed was gradually increased until exhaustion. We found that systemic administration of D1-like (SCH23390) and/or D2-like (raclopride) receptor antagonists prior to the incremental test reduced the duration of forced running in a dose-dependent manner. Similarly, locomotor activity in the open field was decreased by the dopamine antagonists. Interestingly, this was not the case following intrastriatal infusion of an effective dose of SCH23390, which decreased motor performance during the incremental test without disrupting the behavioral response in the open field. Surprisingly, intrastriatal delivery of raclopride failed to impact the duration of forced running. Altogether, these results indicate that the level of locomotor response to incremental loads of forced running in adolescent rats is dopamine dependent and mechanistically linked to the activation of striatal D1 and extra-striatal D2 receptors.
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    Effect of exercises on the VertiMax device on the endurance of under 16-years of age discus throwers
    (Universidad de Murcia. Servicio de publicaciones, 2022) Abbood AL-Nidawi, Ola Issa; Fuad Saleeh, Israa
    The primary aim of the present study was to prepare a set of exercises on the multi-resistor VertiMax device and to identify the effect of these exercises on the development of the endurance of discus throwers under 16 years old. The design of the present study was experimental. Participants were selected using purposive sampling method. A total of 5 discuss players constituted the sample of the study. The authors found a significant improvement in the levels of endurance and performance as a result of the training on the VertiMax device. Therefore, it is recommendable to use exercises on the VertiMax device to improve the endurance and performance of under 16-years of age discus throwers.
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    Running power meters and theoretical models based on laws of physics: effects of environments and running conditions
    (Elsevier, 2020-05-26) Cerezuela Espejo, Víctor; Hernández Belmonte, Alejandro; Courel Ibáñez, Javier; Conesa Ros, Elena; Martínez Cava, Alejandro; García Pallarés, Jesús; Actividad Física y Deporte
    Training prescription and load monitoring in running activities have benefited from power output (PW) data offered by new technologies. Nevertheless, to date, the sensitivity of PW data provided by these tools is still not completely clear. The aim of this study was to analyze the level of agreement between the PW estimated by five commercial technologies and the two main internationally theoretical models based on laws of physics, in different environments and running conditions. Ten endurance-trained male athletes performed three submaximal running protocols on a treadmill (indoor) and an athletic track (outdoor), with changes in speed, body weight, and slope. PW was simultaneously registered by the commercial technologies Stryd (StrydApp and StrydWatch), RunScribe, GarminRP and PolarV, whereas theoretical power output (TPW) was calculated by the two mathematical models (TPW1 and TPW2). Statistics included, among others, the Pearson's correlation coefficient (r) and standard error of measurement (SEM). The PolarV, and above all Stryd, showed the closest agreement with the TPW1 (Stryd: r ≥ 0.947, SEM ≤ 11 W; PolarV: r ≥ 0.931, SEM ≤ 64 W) and TPW2 (Stryd: r ≥ 0.933, SEM ≤ 60 W; PolarV: r ≥ 0.932, SEM ≤ 24 W), both indoors and outdoors. On the other hand, the devices GarminRP (r ≤ 0.765, SEM ≥ 59 W) and RunScribe. (r ≤ 0.508, SEM ≥ 125 W) showed the lowest agreement with the TPW1 and TPW2 models for all conditions and environments analyzed. The closest agreement of the Stryd and PolarV technologies with the TPW1 and TPW2 models suggest these tools as the most sensitive, among those analyzed, for PW measurement when changing environments and running conditions.
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    Theoretical and methodological foundations of the development of special endurance in freestyle wrestling among qualified student-athletes
    (Universidad de Murcia. Servicio de Publicaciones, 2025) Yernazarov, Salamat; Kinayatovich, Uanbayev Yerkin; Ilyassova, Almagul; Kadyrbekov, Ruslan; Kurmanali, Issa; Seitbekova, Karima; Sin departamento asociado
    This study aimed to assess the effectiveness of a newly developed training program for freestyle wrestling athletes. The quantitative research was conducted with 48 student athletes of freestyle wrestling. The training program was divided into two main components: 1) Physical fitness training, tailored to address the specific needs of athletes across seven weight categories: 55 kg (121.25 lbs), 60 kg (132.25 lbs), 66 kg (145.5 lbs), 74 kg (163 lbs), 84 kg (185 lbs), 96 kg (211.5 lbs), and 120 kg (264.5 lbs). 2) Cognitive skills training, focused on enhancing motivation and self-confidence. The program was implemented over a three-month period, with performance measurements taken at two points: before (pre-training) and after (post-training) the intervention. The second phase of the program emphasized cognitive development, specifically targeting motivation and self-confidence. The results showed that there is a positive correlation between athletes’ physical abilities, techniques, endurance, stamina, motivation, and self-confidence with their overall performance (p<0.05). Furthermore, a significant improvement was observed in athlete performance following the completion of the training program (p<0.05). In conclusion, both physical fitness and cognitive skills are critical for improving the performance of freestyle wrestling athletes.