Jacob Bejder
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Explore the profile of Jacob Bejder including associated specialties, affiliations and a list of published articles.
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44
Citations
149
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Recent Articles
1.
Bonne T, Andersen A, Bejder J, Loures J, Dam C, Huertas J, et al.
Med Sci Sports Exerc
. 2025 Feb;
PMID: 39957066
Purpose: This study evaluated whether recombinant human erythropoietin (rhEpo) treatment combined with hypoxia provided an additive effect on hemoglobin mass (Hbmass) and V̇O2peak compared to altitude or rhEpo alone. Methods:...
2.
Fischer M, Bonne T, Klaris M, Lenzing E, Stohr E, Bejder J, et al.
Exp Physiol
. 2025 Feb;
PMID: 39925003
During exercise stress, heart rate (HR) increases to support cardiac output, which also reduces ventricular filling time. Although echocardiography is widely used to assess cardiac function, studies display conflicting data...
3.
Kjeld T, Isbrand A, Arendrup H, Hojberg J, Bejder J, Krag T, et al.
Front Physiol
. 2024 Aug;
15:1296537.
PMID: 39135706
Introduction: Elite breath-hold divers (BHD) possess several oxygen conserving adaptations to endure long dives similar to diving mammals. During dives, Bottlenose Dolphins may increase the alveolar ventilation (V) to perfusion...
4.
Loria F, Andersen A, Bejder J, Bonne T, Grabherr S, Kuuranne T, et al.
Drug Test Anal
. 2024 Feb;
16(11):1392-1401.
PMID: 38382494
Recombinant human erythropoietin (rhEPO) is prohibited by the World Anti-Doping Agency. rhEPO abuse can be indirectly detected via the athlete biological passport (ABP). However, altitude exposure challenges interpretation of the...
5.
Krumm B, Lundby C, Hansen J, Bejder J, Sorensen H, Equey T, et al.
Drug Test Anal
. 2024 Jan;
16(11):1285-1294.
PMID: 38291831
Confounding factors including exercise and environments challenge the interpretation of individual Athlete Biological Passports (ABPs). This study aimed to investigate the natural variability of hematological ABP parameters over 1 year...
6.
Andersen A, Bonne T, Nordsborg N, Holm-Sorensen H, Bejder J
Scand J Clin Lab Invest
. 2024 Jan;
84(1):1-10.
PMID: 38265850
Duplicate measure of hemoglobin mass by carbon monoxide (CO)-rebreathing is a logistical challenge as recommendations prompt several hours between measures to minimize CO-accumulation. This study investigated the feasibility and reliability...
7.
Oberholzer L, Montero D, Robach P, Siebenmann C, Ryrsoe C, Bonne T, et al.
Am J Hematol
. 2023 Nov;
99(1):88-98.
PMID: 38032792
Blood volume (BV) is an important clinical parameter and is usually reported per kg of body mass (BM). When fat mass is elevated, this underestimates BV/BM. One aim was to...
8.
Andersen A, Bejder J, Bonne T, Graae J, Seier S, Nordsborg N
Med Sci Sports Exerc
. 2023 Apr;
55(9):1695-1705.
PMID: 37095637
Purpose: We investigated whether immature reticulocyte fraction (IRF) and the immature reticulocytes to red blood cells ratio (IR/RBC) are sensitive and specific biomarkers for microdose recombinant human erythropoietin (rHuEPO) and...
9.
Glucocorticoids Accelerate Erythropoiesis in Healthy Humans-Should the Use in Sports Be Reevaluated?
Nordsborg N, Bonne T, Andersen A, Sorensen H, Bejder J
Med Sci Sports Exerc
. 2023 Mar;
55(7):1334-1341.
PMID: 36878016
Purpose: The World Anti-Doping Agency prohibits glucocorticoid administration in competition but not in periods out of competition. Glucocorticoid usage is controversial as it may improve performance, albeit debated. A hitherto...
10.
Arrebola-Moreno A, Casuso R, Bejder J, Bonne T, Andersen A, Aragon-Vela J, et al.
Sports Med Open
. 2022 Nov;
8(1):137.
PMID: 36334130
Objectives: To investigate whether recombinant human erythropoietin (rHuEPO) injections during an altitude training camp impact heart function. Methods: Thirty (12 women) moderately trained subjects stayed at 2320 m altitude for...