Publications by authors named "Ewa Zarebska"

Article Synopsis
  • The study investigates how free amino acid (PFAA) levels in the blood change during different training phases of high-performance sprinters over a six-month cycle.
  • Significant decreases in resting levels of certain amino acids like glutamine and histidine were noted between the transition to competition phases, while levels of β-alanine and sarcosine increased.
  • Overall, the findings suggest that speed-power training impacts PFAA concentrations, which could be useful in monitoring athlete training status and performance.
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Circulating blood is an important plasma free amino acids (PFAAs) reservoir and a pivotal link between metabolic pathways. No comparisons are available between athletes with opposite training adaptations that include a broader spectrum of both proteinogenic and non-proteinogenic amino acids, and that take into account skeletal muscle mass. We hypothesized that the levels of the exercise-induced PFAAs concentration are related to the type of training-related metabolic adaptation.

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: A high level of specific metabolic capacity is essential for maximal sprinting in both male and female athletes. Various factors dictate sex differences in maximal power production and energy utilization. This study aims to compare the contribution of energy systems between male and female athletes with similar sport-specific physiological adaptations during a 15-s sprint exercise.

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We aimed to evaluate long-term changes in proteinogenic and non-proteinogenic plasma free amino acids (PFAA). Eleven male endurance triathletes participated in a 9-month study. Blood was collected at rest, immediately after exhaustive exercise, and during 30-min recovery, in four consecutive training phases: transition, general, specific, and competition.

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During strenuous exercise, skin temperature (Tsk) plays an essential role in thermoregulatory processes. As indicated in the literature, its response might be influenced by body composition, among other factors. Hence, the objectives of this investigation were to determine whether there is a correlation between selected body components, specifically fat tissue and muscle tissue, and Tsk during graded exercise and recovery in athletes, and to identify which body component exhibits the strongest correlation with Tsk.

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The objective of the study was to examine the lower limbs skin temperature (T) changes in response to exhaustive whole-body exercise in trained individuals in reference to changes in plasma adenosine triphosphate (ATP). Eighteen trained participants from distinct sport type ‒ endurance (25.2 ± 4.

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Background: We matched highly trained competitive male and female athletes using maximal oxygen uptake (V̇O2max) per kg skeletal muscle mass (SMM) to show sex differences in factors limiting V̇O2max.

Methods: Thirteen highly trained male (28±3.0 yr) vs.

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This study aimed to assess the effect of training loads on plasma adenosine triphosphate responsiveness in highly trained athletes in a 1 y cycle. Highly trained futsal players (11 men, age range 20-31 y), endurance athletes (11 men, age range 18-31 y), sprinters (11 men, age range 21-30 y), and control group (11 men, age range 22-34 y) were examined across four characteristic training phases in response to an incremental treadmill test until exhaustion. A considerably higher exercise and post-exercise plasma adenosine triphosphate concentrations were observed in consecutive training phases in highly trained athletes, with the highest values reached after the competitive period.

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Circulating plasma ATP is able to regulate local skeletal muscle blood flow and 0 delivery causing considerable vasodilatation during exercise. We hypothesized that sport specialization and specific long-term training stimuli have an impact on venous plasma [ATP] and other nucleotides concentration. Four athletic groups consisting of sprinters (n=11; age range 21-30 yr), endurance-trained athletes (n=16; age range 18-31 yr), futsal players (n=14; age range 18-30 yr), and recreationally active individuals (n=12; age range 22-33 yr) were studied.

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