Early changes of the anemia phenomenon in male 100-km ultramarathoners

Abstract

Running a 100-km ultramarathon will induce substantial sports anemia, and oxidative stress response, hemolysis, hematuria, and gastrointestinal bleeding are typical factors that contribute to its onset.

Extremely Low Testosterone due to Relative Energy Deficiency in Sport: A Case Report

“…The anemia is multifactorial, with etiology including hemodilution, oxidative stress, iron deficiency, hematuria, and hemolysis from compressive action of muscles on capillaries. Prolonged levels of endurance exercise can cause intestinal hypoperfusion, ischemia, and loss of gastrointestinal barrier integrity, leading to positive fecal occult blood tests (11). Endoscopic evaluation is generally recommended to exclude other etiologies, but it is often unremarkable, as in this case.…”

Isokinetic knee muscular strength is associated with hematologic variables in female modern dancers

“…Measurement of muscle strength is an important concern to achieve muscular performance and prevention for injury in dancers (Agopyan et al, 2013). In addition, acute and chronic exercise training produce different effects on hematological parameters and most of the hematological studies in literature have focused in different sport disciplines in athletic population (Ahmadi et al, 2010;Chiu et al, 2015;Kokubo et al, 2016;Petersen, et al, 2006). It has been reported that anemia is one of the deteriorative problems in athletes especially in females (Yasui, et al, 2015).…”

“…From this point of view, another essential result of our study is that there were a strong, negative correlation between TW (300ºs -1 ) of left leg extensor muscles and RBC count, Hct and Hb values indicating that the dancers with weak muscle strength generate lower muscular endurance. The hematologic parameters can be crucial for predicting optimal physical performance (Chiu et al, 2015;Ostojic, & Ahmetovic, 2009). In the present study, this interaction was occurred especially isokinetic strength production performances at 300ºs -1 angular velocities, which is a muscular endurance indicator.…”

“…The stability of hematologic status is one of the key determinants of optimal exercise performance, particularly in endurance sports such as soccer and long-distance runners (Chiu et al, 2015;Gibson et al, 2011). The decrease in Hb and Hct is a sign of physical exertion and heavy participation (Malcovati, Pascutto, & Cazzola, 2003).…”

Exercise-induced anaemia: a forgotten cause of iron deficiency anaemia in young adults

“…[6][7][8] Increased pro-inflammatory markers, occult blood loss in urine and faeces, and a decreased haptoglobin level are observed in patients immediately after intensive training (<24 hours). 6,9 Iron loss due to excessive sweating has also been proposed as an underlying mechanism. Although high levels of iron have been measured in sweat, this iron is probably derived from or contaminated by cellular debris.…”