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Impact of COVID-19 lockdown on injury risk in Qatar's professional football.
Chamari K, Schumacher YO, Chaabane M, Rekik RN, Chebbi S, Daoud R, Bache-Mathiesen LK, Alkhelaifi K, Bahr R, Tabben M. Chamari K, et al. Among authors: schumacher yo. J Sci Med Sport. 2023 Oct;26(10):522-527. doi: 10.1016/j.jsams.2023.09.008. Epub 2023 Sep 19. J Sci Med Sport. 2023. PMID: 37777395
METHODS: Injury and exposure data for two post-COVID-19 lockdown periods [early post-lockdown period: short-term ~2 months (54 matches) and late post-lockdown period: long-term 8-months (183 matches)] were compared to the benchmark of the same periods from the three …
METHODS: Injury and exposure data for two post-COVID-19 lockdown periods [early post-lockdown period: short-term ~2 months (54 matche …
Iron deficiency in sports - definition, influence on performance and therapy.
Clénin G, Cordes M, Huber A, Schumacher YO, Noack P, Scales J, Kriemler S. Clénin G, et al. Among authors: schumacher yo. Swiss Med Wkly. 2015 Oct 29;145:w14196. doi: 10.4414/smw.2015.14196. eCollection 2015. Swiss Med Wkly. 2015. PMID: 26512429 Free article. Review.
It is important to follow up the athletes on an individual basis, repeating the baseline blood tests listed above twice a year. A long-term daily oral iron intake or i.v. supplementation in the presence of normal or even high ferritin values does not make sense and may be …
It is important to follow up the athletes on an individual basis, repeating the baseline blood tests listed above twice a year. A long-te …
The effect of a period of intense exercise on the marker approach to detect growth hormone doping in sports.
Voss SC, Robinson N, Alsayrafi M, Bourdon PC, Schumacher YO, Saugy M, Giraud S. Voss SC, et al. Among authors: schumacher yo. Drug Test Anal. 2014 Jun;6(6):582-6. doi: 10.1002/dta.1666. Epub 2014 May 14. Drug Test Anal. 2014. PMID: 24827554
The period of exercise did not increase the GH-scores; however the accompanying effect of the increase in Plasma Volume yielded in essentially lower GH-scores. We could demonstrate that a period of heavy, long-term exercise with changes in plasma volume does not interfere …
The period of exercise did not increase the GH-scores; however the accompanying effect of the increase in Plasma Volume yielded in essential …
The effect of a period of intensive exercise on the isoform test to detect growth hormone doping in sports.
Voss SC, Giraud S, Alsayrafi M, Bourdon PC, Schumacher YO, Saugy M, Robinson N. Voss SC, et al. Among authors: schumacher yo. Growth Horm IGF Res. 2013 Aug;23(4):105-8. doi: 10.1016/j.ghir.2013.03.006. Epub 2013 Apr 19. Growth Horm IGF Res. 2013. PMID: 23608056
CONCLUSIONS: The present study demonstrates that the hGH isoform ratios are not significantly affected by exercise or circadian variation. We demonstrated that heavy, long term exercise does not interfere with the decision limits for an adverse analytical finding....
CONCLUSIONS: The present study demonstrates that the hGH isoform ratios are not significantly affected by exercise or circadian variation. W …
Longitudinal observation of Epstein-Barr virus antibodies in athletes during a competitive season.
Pottgiesser T, Schumacher YO, Wolfarth B, Schmidt-Trucksäss A, Bauer G. Pottgiesser T, et al. Among authors: schumacher yo. J Med Virol. 2012 Sep;84(9):1415-22. doi: 10.1002/jmv.23253. J Med Virol. 2012. PMID: 22825820
Due to possible mild immunosuppression in competitive athletes, EBV reactivation determined by increases in salivary viral load have been identified as one possible cause in recurrent respiratory infections. The long-term variation in EBV antibody levels in athletes compar …
Due to possible mild immunosuppression in competitive athletes, EBV reactivation determined by increases in salivary viral load have been id …
Short-term hematological effects upon completion of a four-week simulated altitude camp.
Pottgiesser T, Garvican LA, Martin DT, Featonby JM, Gore CJ, Schumacher YO. Pottgiesser T, et al. Among authors: schumacher yo. Int J Sports Physiol Perform. 2012 Mar;7(1):79-83. doi: 10.1123/ijspp.7.1.79. Epub 2011 Aug 30. Int J Sports Physiol Perform. 2012. PMID: 21941010
Hemoglobin mass (tHb) is considered to be a main factor for sea-level performance after "live high-train low" (LHTL) altitude training, but little research has focused on the persistence of tHb following cessation of altitude exposure. The aim of the case study was to investigate …
Hemoglobin mass (tHb) is considered to be a main factor for sea-level performance after "live high-train low" (LHTL) altitude training, but …
Reticulocytes in athletes: Longitudinal aspects and the influence of long- and short-term exercise.
Schumacher YO, Sahm D, Baumstark MW, Pottgiesser T. Schumacher YO, et al. Drug Test Anal. 2010 Oct;2(10):469-74. doi: 10.1002/dta.180. Drug Test Anal. 2010. PMID: 20886465
The aim of the present study was to evaluate longitudinal variation in Ret and the influence of short- and long-term exercise.Ret% in 793 samples of 238 athletes were determined and analyzed in different study parts for inter- and intra-individual variation and the impact …
The aim of the present study was to evaluate longitudinal variation in Ret and the influence of short- and long-term exercise.Ret% in …
Success in elite cycling: A prospective and retrospective analysis of race results.
Schumacher YO, Mroz R, Mueller P, Schmid A, Ruecker G. Schumacher YO, et al. J Sports Sci. 2006 Nov;24(11):1149-56. doi: 10.1080/02640410500457299. J Sports Sci. 2006. PMID: 17175613
No difference was found in career lengths. The data presented here emphasize the importance of long-term training programmes in the development of peak performance in cycling....
No difference was found in career lengths. The data presented here emphasize the importance of long-term training programmes in the d …
The 4000-m team pursuit cycling world record: theoretical and practical aspects.
Schumacher YO, Mueller P. Schumacher YO, et al. Med Sci Sports Exerc. 2002 Jun;34(6):1029-36. doi: 10.1097/00005768-200206000-00020. Med Sci Sports Exerc. 2002. PMID: 12048333 Review.
The training concept of the 2000 record-breaking team pursuit team was based on unspecific training of these qualities and periodical, short-term recall of previously acquired track specific skills. Aerobic performance was trained through high overall training mileage (29, …
The training concept of the 2000 record-breaking team pursuit team was based on unspecific training of these qualities and periodical, short …