Jacob Bejder

Research output

Research output per year 2015 2019 2020 2021 2022 2023 2024 2024

• 498 Citations
• 38 Journal article
• 5 Comment/debate
• 4 Review
• 1 Ph.D. thesis
• 4 More
  • 1 Article in proceedings
  • 1 Conference abstract in journal
  • 1 Contribution to newspaper - Feature article
  • 1 Preprint

Research output per year

Research output per year

Search results

• 2024

  Contemporary blood doping: Performance, mechanism, and detection

  Breenfeldt Andersen, A., Nordsborg, N. B., Bonne, T. C. & Bejder, J., 2024, In: Scandinavian Journal of Medicine & Science in Sports. 34, 1, 15 p., e14243.

  Research output: Contribution to journal › Review › Research › peer-review

  Open Access

  File
  5 Citations (Scopus)

  39 Downloads (Pure)

• Determinants and reference values for blood volume and total hemoglobin mass in women and men

  Oberholzer, L., Montero, D., Robach, P., Siebenmann, C., Ryrsøe, C. K., Bonne, T. C., Breenfeldt Andersen, A., Bejder, J., Karlsen, T., Edvardsen, E., Rønnestad, B. R., Hamarsland, H., Cepeda-Lopez, A. C., Rittweger, J., Treff, G., Ahlgrim, C., Almquist, N. W., Hallén, J. & Lundby, C., 2024, In: American Journal of Hematology. 99, 1, p. 88-98 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  12 Citations (Scopus)

  12 Downloads (Pure)

• Duplicate measures of hemoglobin mass within an hour: feasibility, reliability, and comparison of three devices in supine position

  Breenfeldt Andersen, A., Bonne, T. C., Nordsborg, N. B., Holm-Sørensen, H. & Bejder, J., 2024, In: Scandinavian Journal of Clinical and Laboratory Investigation. 84, 1, p. 1-10

  Research output: Contribution to journal › Journal article › Research › peer-review
  2 Citations (Scopus)

• mRNA biomarkers sensitive and specific to micro-dose erythropoietin treatment at sea level and altitude

  Loria, F., Breenfeldt Andersen, A., Bejder, J., Bonne, T., Grabherr, S., Kuuranne, T., Leuenberger, N. & Baastrup Nordsborg, N., 2024, In: Drug Testing and Analysis. 16, 11, p. 1392-1401

  Research output: Contribution to journal › Journal article › Research › peer-review
  2 Citations (Scopus)

• Pulmonary vascular adaptations to hypoxia in elite breath-hold divers

  Kjeld, T., Isbrand, A. B., Arendrup, H. C., Højberg, J., Bejder, J., Krag, T. O., Vissing, J., Tolbod, L. P., Harms, J. H., Gormsen, L. C., Fuglø, D. & Hansen, E. G., 2024, In: Frontiers in Physiology. 15, 10 p., 1296537.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  1 Downloads (Pure)

• Yearly intrasubject variability of hematological biomarkers in elite athletes for the Athlete Biological Passport

  Krumm, B., Lundby, C., Hansen, J., Bejder, J., Sørensen, H., Equey, T., Saugy, J., Botrè, F. & Faiss, R., 2024, In: Drug Testing and Analysis. 16, 11, p. 1285-1294

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
• 2023

  A semi-automated device rapidly determine circulating blood volume in healthy males and carbon monoxide uptake kinetics of arterial and venous blood

  Breenfeldt Andersen, A., Baungaard, S. B., Bejder, J., Graae, J., Hristovska, A-M., Agerskov, M., Holm-Sørensen, H. & Foss, N. B., 2023, In: Journal of Clinical Monitoring and Computing. 37, 2, p. 437-447 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access
  4 Citations (Scopus)

• Changes in immature reticulocytes aid the indirect detection of microdose recombinant erythropoietin use in males and females

  Breenfeldt Andersen, A., Bejder, J., Bonne, T. C., Graae, J., Seier, S. & Nordsborg, N. B., 2023, In: Medicine and Science in Sports and Exercise. 55, 9, p. 1695-1705 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  3 Citations (Scopus)

• Glucocorticoids accelerate erythropoiesis in healthy humans - should the use in sports be reevaluated?

  Nordsborg, N. B., Bonne, T. C., Breenfeldt Andersen, A., Sørensen, H. & Bejder, J., 2023, In: Medicine and Science in Sports and Exercise. 55, 7, p. 1334-1341 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  3 Citations (Scopus)

  20 Downloads (Pure)

• Microdoses of recombinant human erythropoietin enhance time trial performance in trained males and females

  Breenfeldt Andersen, A., Graae, J., Bejder, J., Bonne, T. C., Seier, S., Debertin, M., Eibye, K., Hostrup, M. & Nordsborg, N. B., 2023, In: Medicine and Science in Sports and Exercise. 55, 2, p. 311-321 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  8 Citations (Scopus)

  53 Downloads (Pure)

• Moderate hypoxic exposure for 4 weeks reduces body fat percentage and increases fat-free mass in trained individuals: a randomized crossover study

  Bonne, T. C., Jeppesen, J. S., Bejder, J., Breenfeldt Andersen, A., Olsen, N. V., Huertas, J. R. & Nordsborg, N. B., 2023, In: Sleep and Breathing. 27, 4, p. 1611-1618 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

• Robust arm and leg muscle adaptation to training despite ACE inhibition: a randomized placebo-controlled trial

  Sjúrðarson, T., Bejder, J., Breenfeldt Andersen, A., Bonne, T. C., Kyhl, K., Thomassen, M., Prats, J., Oddmarsdóttir Gregersen, N., Skoradal, M-B., Weihe, P., Nordsborg, N. B. & Mohr, M., 2023, In: European Journal of Applied Physiology. 123, 2, p. 325-337 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
• 2022

  AI-based approach for improving the detection of blood doping in sports

  Rahman, M. R., Bejder, J., Bonne, T. C., Breenfeldt Andersen, A., Huertas, J. R., Aikin, R., Nordsborg, N. B. & Maaß, W., 9 Feb 2022, arxiv.org, p. 1-7, 7 p.

  Research output: Working paper › Preprint › Research

• A single glucocorticoid injection accelerate erythropoiesis but does not improve performance

  Bejder, J., Bonne, T. C., Breenfeldt Andersen, A., Sørensen, H. & Nordsborg, N. B., 2022, In: F A S E B Journal. 36, Suppl. 1, 1 p., L7503.

  Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

• Commentaries on Viewpoint: Consider iron status when making sex comparisons in human physiology: How to account for the potential sex-specific influence in iron status in human physiology

  Andersen, A. B., Bejder, J. & Gliemann, L., 2022, In: Journal of Applied Physiology. 132, 3, p. 704-705 2 p.

  Research output: Contribution to journal › Comment/debate › Research
  1 Citation (Scopus)

• Detection of erythropoietin in blood to uncover doping in sports using machine learning

  Rahman, M. R., Bejder, J., Bonne, T. C., Andersen, A. B., Huertas, J. R., Aikin, R., Nordsborg, N. B. & Maass, W., 2022, Proceedings - 2022 IEEE International Conference on Digital Health, ICDH 2022. Ahamed, S. I., Ardagna, C. A., Bian, H., Bochicchio, M., Chang, C. K., Chang, R. N., Damiani, E., Liu, L., Pavel, M., Priami, C., Shahriar, H., Ward, R., Xhafa, F., Zhang, J. & Zulkernine, F. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 193-201 9 p. (IEEE International Conference on Digital Health, Vol. 2022).

  Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
  4 Citations (Scopus)

• Does hypoxia and stress erythropoiesis compromise cardiac function in healthy adults? A randomized trial

  Arrebola-Moreno, A. L., Casuso, R. A., Bejder, J., Bonne, T. C., Breenfeldt Andersen, A., Aragón-Vela, J., Nordsborg, N. B. & Huertas, J. R., 2022, In: Sports Medicine - Open. 8, 7 p., 137.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  37 Downloads (Pure)

• Effect of angiotensin-converting enzyme inhibition on cardiovascular adaptation to exercise training

  Sjúrðarson, T., Bejder, J., Breenfeldt Andersen, A., Bonne, T., Kyhl, K., Róin, T., Patursson, P., Oddmarsdóttir Gregersen, N., Skoradal, M-B., Schliemann, M., Lindegaard, M., Weihe, P., Mohr, M. & Nordsborg, N. B., 2022, In: Physiological Reports. 10, 13, 13 p., e15382.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  32 Downloads (Pure)

• Hepcidin and erythroferrone complement the Athlete Biological Passport in the detection of autologous blood transfusion

  Andersen, A. B., Bejder, J., Bonne, T. C., Sørensen, H., Sørensen, H., Jung, G., Ganz, T., Nemeth, E., Secher, N. H., Johansson, P. I. & Nordsborg, N. B., 2022, In: Medicine and Science in Sports and Exercise. 54, 9, p. 1604-1616 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  14 Citations (Scopus)

  40 Downloads (Pure)
• 2021

  An abductive inference approach to assess the performance-enhancing effects of drugs included on the World Anti-Doping Agency Prohibited List

  Breenfeldt Andersen, A., Jacobson, G. A., Bejder, J., Premilovac, D., Richards, S. M., Rasmussen, J. J., Jessen, S. & Hostrup, M., 2021, In: Sports Medicine. 51, 7, p. 1353-1376 24 p.

  Research output: Contribution to journal › Review › Research › peer-review

  Open Access

  File
  15 Citations (Scopus)

  27 Downloads (Pure)

• An untargeted urine metabolomics approach for autologous blood transfusion detection

  Bejder, J., Gürdeniz, G., Cuparencu, C., Hall, F., Gybel-Brask, M., Andersen, A. B., Dragsted, L. O., Secher, N. H., Johansson, P. I. & Nordsborg, N. B., 2021, In: Medicine and Science in Sports and Exercise. 53, 1, p. 236-243 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  9 Citations (Scopus)

  73 Downloads (Pure)

• Distribution of concurrent training sessions does not impact endurance adaptation

  Kilen, A., Bay, J., Bejder, J., Breenfeldt Andersen, A., Bonne, T., Larsen, P., Carlsen, A., Egelund, J., Nybo, L., Olsen, N. V., Aachmann-Andersen, N. J., Løvind Andersen, J. & Nordsborg, N. B., 2021, In: Journal of Science and Medicine in Sport. 24, 3, p. 291-296 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  9 Citations (Scopus)

• Effects of altitude and recombinant human erythropoietin on iron metabolism: a randomized controlled trial

  Breenfeldt Andersen, A., Bonne, T. C., Bejder, J., Jung, G., Ganz, T., Nemeth, E., Olsen, N. V., Rodriguez Huertas, J. & Nordsborg, N. B., 2021, In: American Journal of Physiology: Regulatory, Integrative and Comparative Physiology. 321, 2, p. R152-R161 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  10 Citations (Scopus)

  40 Downloads (Pure)

• EpoR stimulates rapid cycling and larger red cells during mouse and human erythropoiesis

  Hidalgo, D., Bejder, J., Pop, R., Gellatly, K., Hwang, Y., Scalf, S. M., Eastman, A. E., Chen, J-J., Zhu, L. J., Heuberger, J. A. A. C., Guo, S., Koury, M. J., Nordsborg, N. B. & Socolovsky, M., 2021, In: Nature Communications. 12, 17 p., 7334.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  21 Citations (Scopus)

  28 Downloads (Pure)

• Extreme hypoxia causing brady-arrythmias during apnea in elite breath-hold divers

  Kjeld, T., Isbrand, A. B., Linnet, K., Zerahn, B., Højberg, J., Hansen, E. G., Gormsen, L. C., Bejder, J., Krag, T., Vissing, J., Bøtker, H. E. & Arendrup, H. C., 2021, In: Frontiers in Physiology. 12, 12 p., 712573.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  6 Citations (Scopus)

  41 Downloads (Pure)

• Hematological adaptations and detection of recombinant human erythropoietin combined with chronic hypoxia

  Bejder, J., Andersen, A. B., Bonne, T. C., Linkis, J., Olsen, N. V., Huertas, J. R. & Nordsborg, N. B., 2021, In: Drug Testing and Analysis. 13, 2, p. 360-368 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  15 Citations (Scopus)

  34 Downloads (Pure)

• Immature reticulocytes are sensitive and specific to low-dose erythropoietin treatment at sea level and altitude

  Jeppesen, J. S., Breenfeldt Andersen, A., Bonne, T. C., Thomassen, M., Sørensen, H., Nordsborg, N. B., Olsen, N. V., Huertas, J. R. & Bejder, J., 2021, In: Drug Testing and Analysis. 13, 7, p. 1331-1340 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  12 Citations (Scopus)

  43 Downloads (Pure)

• Reliability and validity of the SHFT running power meter

  Linkis, J. E., Bonne, T. C., Bejder, J., Rasmussen, E. K., Breenfeldt Andersen, A. & Nordsborg, N. B., 2021, In: Sensors. 21, 22, 9 p., 7516.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  2 Citations (Scopus)

  26 Downloads (Pure)
• 2020

  Does intermittent exposure to high altitude increase the risk of cardiovascular disease in workers? A systematic narrative review

  Aragón-Vela, J., Bejder, J., Huertas, J. R., Plaza-Diaz, J. & Nordsborg, N. B., 2020, In: B M J Open. 10, 11, 14 p., 041532.

  Research output: Contribution to journal › Review › Research › peer-review

  Open Access

  File
  6 Citations (Scopus)

  20 Downloads (Pure)

• Impact of low-volume concurrent strength training distribution on muscular adaptation

  Kilen, A., Bay, J., Bejder, J., Andersen, A. B., Bonne, T. C., Larsen, P. D., Carlsen, A., Egelund, J., Nybo, L., Mackey, A. L., Olsen, N. V., Aachmann-Andersen, N. J., Andersen, J. L. & Nordsborg, N. B., 2020, In: Journal of Science and Medicine in Sport. 23, 10, p. 999-1004 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  5 Citations (Scopus)

• Low doses of recombinant human erythropoietin does not affect C-terminal FGF23 in healthy men

  Bejder, J., Robach, P., Lundby, A-K., Cornu, C., Sallet, P., Cairo, G. & Lundby, C., 2020, In: Drug Testing and Analysis. 12, 7, p. 975-979 5 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  3 Citations (Scopus)

  20 Downloads (Pure)

• Repeated Wingate sprints is a feasible high-quality training strategy in moderate hypoxia

  Andersen, A. B., Bejder, J., Bonne, T. C., Olsen, N. V. & Nordsborg, N. B., 2020, In: P L o S One. 15, 11, 13 p., e0242439.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  6 Citations (Scopus)

  49 Downloads (Pure)

• Reproducibility of the CO rebreathing technique with a lower CO dose and a shorter rebreathing duration at sea level and at 2320 m of altitude

  Oberholzer, L., Bonne, T. C., Breenfeldt Andersen, A., Bejder, J., Højgaard Christensen, R., Nordsborg, N. B. & Lundby, C., 2020, In: Scandinavian Journal of Clinical & Laboratory Investigation. 80, 7, p. 590-599 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  8 Citations (Scopus)

• The central blood volume as measured by thoracic electrical impedance and plasma proANP is not compromised by donation of 900 mL of blood in men

  Gybel-Brask, M., Nordsborg, N. B., Goetze, J. P., Johansson, P. I., Secher, N. H. & Bejder, J., 2020, In: Transfusion Medicine. 30, 6, p. 450-455 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  2 Citations (Scopus)

• Tramadol does not improve performance or impair motor function in trained cyclists

  Bejder, J., Andersen, A. B., Bonne, T. C., Piil, J. F., Hagen, L. C. H., Dehnes, Y., Eibye, K. H., Nybo, L. & Nordsborg, N. B., 2020, In: Medicine and Science in Sports and Exercise. 52, 5, p. 1169-1175 7 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  11 Citations (Scopus)

  26 Downloads (Pure)
• 2019

  Autologous blood transfusion enhances exercise performance - strength of the evidence and physiological mechanisms

  Solheim, S. A., Bejder, J., Breenfeldt Andersen, A., Mørkeberg, J. & Nordsborg, N. B., 2019, In: Sports Medicine - Open. 5, 11 p., 30.

  Research output: Contribution to journal › Review › Research › peer-review

  Open Access

  File
  26 Citations (Scopus)

  188 Downloads (Pure)

• Detection and Physiological Effects of Blood Volume Manipulations

  Bejder, J., 2019, Copenhagen: Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen. 80 p.

  Research output: Book/Report › Ph.D. thesis › Research

  File

• Physiological determinants of elite mountain bike cross-country Olympic performance

  Bejder, J., Bonne, T. C., Nyberg, M. P., Sjøberg, K. A. & Nordsborg, N. B., 2019, In: Journal of Sports Sciences. 37, 10, p. 1154-1161 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  12 Citations (Scopus)

  34 Downloads (Pure)

• Response

  Bejder, J., Andersen, A. B., Solheim, S. A. & Nordsborg, N. B., 2019, In: Medicine and Science in Sports and Exercise. 51, 7, p. 1569 1 p.

  Research output: Contribution to journal › Comment/debate › Research
  2 Citations (Scopus)

• Time trial performance is sensitive to low-volume autologous blood transfusion

  Bejder, J., Andersen, A. B., Solheim, S. A., Gybel-Brask, M., Secher, N. H., Johansson, P. I. & Nordsborg, N. B., 2019, In: Medicine and Science in Sports and Exercise. 51, 4, p. 692-700 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  30 Citations (Scopus)

  30 Downloads (Pure)
• 2018

  Legalisering af doping er uforsvarligt og praktisk umuligt

  Andersen, A. B., Rasmussen, J. J., Bejder, J., Juul, A., Hostrup, M., Solheim, S. A., Bonne, T. C. & Nordsborg, N. B., 29 Jul 2018, In: Berlingske. p. 24-25 2 p.

  Research output: Contribution to journal › Contribution to newspaper - Feature article › Communication

• Oxygen conserving mitochondrial adaptations in the skeletal muscles of breath hold divers

  Kjeld, T., Stride, N., Gudiksen, A., Hansen, E. G., Arendrup, H. C., Horstmann, P. F., Zerahn, B., Jensen, L. T., Nordsborg, N. B., Bejder, J. & Halling, J. F., 19 Sep 2018, In: P L o S One. 13, 9, p. 1-13 13 p., e0201401.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

  File
  19 Citations (Scopus)

  226 Downloads (Pure)

• Response

  Bejder, J. & Nordsborg, N. B., 2018, In: Exercise and Sport Sciences Reviews. 46, 4, p. 272 1 p.

  Research output: Contribution to journal › Comment/debate › Research

• Specificity of "Live High-Train Low" altitude training on exercise performance

  Bejder, J. & Nordsborg, N. B., 2018, In: Exercise and Sport Sciences Reviews. 46, 2, p. 129-136 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  16 Citations (Scopus)
• 2017

  Endurance, aerobic high-intensity, and repeated sprint cycling performance is unaffected by normobaric "Live High-Train Low": a double-blind placebo-controlled cross-over study

  Bejder, J., Andersen, A. B., Buchardt, R., Larsson, T. H., Olsen, N. V. & Nordsborg, N. B., 2017, In: European Journal of Applied Physiology. 117, 5, p. 979-988 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  14 Citations (Scopus)

• Erythropoietin on cycling performance

  Bejder, J., Nybo, L., Sawka, M. N., Joyner, M. J. & Nordsborg, N. B., 2017, In: The Lancet Haematology. 4, 10, p. e459-e460 2 p.

  Research output: Contribution to journal › Comment/debate › Research
  43 Citations (Scopus)

• Hypoxic dose, intensity distribution, and fatigue monitoring are paramount for "live high-train low"

  Bejder, J. & Nordsborg, N. B., 2017, In: European Journal of Applied Physiology. 117, 10, p. 2121-2122 2 p.

  Research output: Contribution to journal › Comment/debate › Research › peer-review
  1 Citation (Scopus)

• Plasma volume reduction and hematological fluctuations in high-level athletes after an increased training load

  Bejder, J., Andersen, A. B., Goetze, J. P., Aachmann-Andersen, N. J. & Nordsborg, N. B., 2017, In: Scandinavian Journal of Medicine & Science in Sports. 27, 12, p. 1605-1615 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  25 Citations (Scopus)
• 2016

  Acute hyperhydration reduces athlete biological passport OFF-hr score

  Bejder Rasmussen, J., Hoffmann, M. F., Ashenden, M., Nordsborg, N. B., Karstoft, K. & Mørkeberg, J. S., 2016, In: Scandinavian Journal of Medicine & Science in Sports. 26, 3, p. 338-347 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  30 Citations (Scopus)

• Detection of erythropoietin misuse by the Athlete Biological Passport combined with reticulocyte percentage

  Bejder, J., Aachmann-Andersen, N. J., Bonne, T. C., Olsen, N. V. & Nordsborg, N. B., Oct 2016, In: Drug Testing and Analysis. 8, 10, p. 1049-1055 7 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  21 Citations (Scopus)