Studies examining effects of doping in professional
road racing building on archival records of the three major European stage
races—the
Tour de France, Giro d’Italia, and Vuelta a Espana—con- cluded that riders’
final performances in the “epo era” (>1990) strongly improved, yet declined
since 2004. These observations can be criticized. First, we argue that time
trial performances are more valid than final performances to indirectly
evaluate doping effects. Second, we will pay attention to an informal logical
flaw—the Texas sharpshooter fallacy—which may have biased findings and
conclusions presented in the studies. To empirically substantiate our critique,
we analyzed mean kilometers per hour (km/h) performances realized by winning
riders in all time trials on flat and rolling terrain in the three tours (1933-2013, N = 325). Regression
analyses revealed no evidence for nonlinear in- or decreases in riders’ speed
beyond the 1990s, but a straightforward linear progress over time of b = 0.16 km/h per year (R2 = 0.50, p ≤ 0.001). Findings
corroborate our comments on previous archival studies and qualify opinions
about effects of the “epo epidemic” on cyclists’ achievements, since the time
trial performances delivered in these years are no exemption to the observed
linear progress in speed.
Cite this paper
Lodewijkx, H. F. M. and Verboon, P. (2014). The Texas Sharpshooter in the Three Grand Tours (1933-2013): No Evidence for Superior Time Trial Performances in the “Epo Era”. Open Access Library Journal, 1, e1045. doi: http://dx.doi.org/10.4236/oalib.1101045.
USADA
(2012) Statement from USADA CEO Travis T. Tygart Regarding the U.S. Postal
Service Pro Cycling Team Doping Conspiracy. http://cyclinginvestigation.usada.org
El
Helou, N., Berthelot, G., Thibaut, V., Tafflet, M., Massif, H., Campion, F., et al. (2010) Tour de France, Giro,
Vuelta, and Classic European Races Show a Unique Progression of Road Cycling
Speed in the Last 20 Years. Journal of
Sports Sciences, 28, 789-796. http://dx.doi.org/10.1080/02640411003739654
Perneger,
T.V. (2010) Speed Trends of Major Cycling Races: Does Slower Mean Cleaner? International Journal of Sports Medicine,
31, 261-264. http://dx.doi.org/10.1055/s-0030-1247593
Catlin, D.H., Hatton, C.K. and Lasne, F. (2006) Abuse of Recombinant Erythropoietins by Athletes. In: Molineux, G., Foote, M.A. and Elliott, S.G., Eds., Erythropoietins and Erythropoiesis, Birkhauser Verlag, Basel, 205-228. http://dx.doi.org/10.1007/3-7643-7543-4_13
Lodewijkx,
H.F.M. and Brouwer, B. (2011) Some Empirical Notes on the “Epo Epidemic” in Professional Cycling. Research Quarterly for
Exercise and Sport, 82, 593-608. http://dx.doi.org/10.1080/02701367.2011.10599811
Lodewijkx,
H.F.M. and Brouwer, B. (2012) Tour, Giro Vuelta: Rapid Progress in Cycling
Performance Starts in the 1980s. International
Journal of Sports Science, 2, 24-31.
Lodewijkx,
H.F.M. and Verboon, P. (2013) Lance Armstrong’s Era of Performance—Part I:
Are His Time Trial Performances Much Different from Other Winners? Journal of AthleticEnhancement, 2, 1. http://dx.doi.org/10.4172/2324-9080.1000106
Jeukendrup,
A.E., Craig, N.P. and Hawley, J.A. (2000) The Bioenergetics of World Class Cycling. Journal
of Science and Medicine in Sport, 3, 414-433. http://dx.doi.org/10.1016/S1440-2440(00)80008-0
Magnier, D., Picq, P., Debreilly, M.,
Zingoni, P., Haffreingue, H. and Bey, J.-L. (2014) Cycling Remembered. [In French: Mémoire du
cyclisme]. http://www.memoire-du-cyclisme.eu
Cleveland,
W.S. and Devlin, S.J. (1988) Locally-Weighted Regression: An Approach to Regression
Analysis by Local Fitting. Journal of the
American Statistical Association, 83, 596-610. http://dx.doi.org/10.2307/2289282
Lucia, A.,
Earnest, C. and Arribas, C. (2003) The Tour de France: A Physiological Review. Scandinavian
Journal of Medicine and Science in Sports, 13, 275-283. http://dx.doi.org/10.1034/j.1600-0838.2003.00345.x
Kuipers,
H. (2006) Putative Effects of Doping in Cycling. [In Dutch: Vermeende effecten
van doping in de wieler- sport]. Nederlands Tijdschrift voor Geneeskunde, 150, 2643-2645.
Lodewijkx, H.F.M., Brouwer, B.,
Kuipers, H. and Van Hezewijk, R. (2013) Overestimated Effect of Epo Administration
on Aerobic Exercise Capacity: A Meta-Analysis. American Journal of Sports Science and Medicine, 1, 17-27.
Heuberger,
J.A.A.C., Cohen-Tervaert, J.M., Schepers, F.M.L., Vliegenthart, A.D.B.,
Rotmans, J.I., Daniels, J.M.A., Burggraaf, J. and Cohen, A.F. (2012) Erythropoietin Doping in Cycling: Lack of Evidence
for Efficacy and a Negative Risk-Benefit. British Journal of Clinical Pharmacology,
75, 1406-1421. http://dx.doi.org/10.1111/bcp.12034
Hopkins,
W.G., Hawley, J.A. and Burke, L.M. (1999) Design and Analysis of Research on Sport
Performance Enhancement. Medicine and Science
in Sports and Exercise, 31, 472-485. http://dx.doi.org/10.1097/00005768-199903000-00018
Ninot, G., Connes, P. and Caillaud, C. (2006) Effects of Recombinant Human Erythropoietin
Injections on Physical Self in Endurance Athletes. Journal of Sports Sciences,24,
383-391. http://dx.doi.org/10.1080/02640410500131340