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The health risks and benefits of cycling in urban environments compared with car use: health impact assessment study

BMJ 2011; 343 doi: https://doi.org/10.1136/bmj.d4521 (Published 04 August 2011) Cite this as: BMJ 2011;343:d4521

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Infertility and important genitourinary tract morbidity not even mentioned

Dear Editor,

This study did not take into account important morbidity associated
with cycling.

As potential health risks, only road traffic incidents and exposure
to air pollution were included.

Genitourinary tract injuries, pudendal nerve entrapment, erectile
dysfunction, infertility in both men and women(!), priapism, penile
thrombosis, hematuria, torsion of spermatic cord, prostatitis, perineal
nodular indurations, elevated serum PSA levels, were not even mentioned.
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

Studies have demonstrated that a high percentage of cyclists are
affected by all these pelvic symptoms.

Failing to include all this cycling-associated morbidity has
compromised Authors' final conclusions, regarding the amount of health
risks associated to cycling, in my opinion.

References

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[2] Urologe A. 2011 Feb;50(2):188-96.
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http://www.ncbi.nlm.nih.gov/pubmed/20626598

[4] J Sex Med. 2010 Jul;7(7):2346-58. Epub 2010 Jan 19.
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http://www.ncbi.nlm.nih.gov/pubmed/20102446

[5] Curr Urol Rep. 2007 Nov;8(6):491-7.
Bicycle riding, perineal trauma, and erectile dysfunction: data and
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http://www.ncbi.nlm.nih.gov/pubmed/18042330

[6] BJU Int. 2007 Jan;99(1):135-40.
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Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH
03756, USA.

http://www.ncbi.nlm.nih.gov/pubmed/17227499

[7] J Sex Med. 2005 Sep;2(5):612-9.
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http://www.ncbi.nlm.nih.gov/pubmed/16422818

[8] J Sex Med. 2005 Sep;2(5):596-604.
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Institute for Sexual Medicine, Department of Urology, Boston University
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http://www.ncbi.nlm.nih.gov/pubmed/16422816

[9] J Urol. 2004 Aug;172(2):637-41.
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Dettori JR, Koepsell TD, Cummings P, Corman JM.
Department of Epidemiology, School of Public Health and Community
Medicine, University of Washington and Department of Urology, Virginia
Mason Medical Center, Seattle, USA.

http://www.ncbi.nlm.nih.gov/pubmed/15247750

[10] Eur Urol. 2005 Mar;47(3):277-86; discussion 286-7. Epub 2004
Dec 30.
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Department of Urology, Meir Medical Center, Affiliated to Sackler School
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Israel.

http://www.ncbi.nlm.nih.gov/pubmed/15716187

[11] J Appl Physiol. 1984 Jun;56(6):1453-63.
Endurance training effects on plasma hormonal responsiveness and sex
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MD, Gervino EV, McArthur JW.

http://www.ncbi.nlm.nih.gov/pubmed/6735803

Competing interests: No competing interests

23 September 2011
Stavros Saripanidis
Consultant in Obstetrics and Gynaecology in Greece
Private Sector, 55131