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Health effects of the London bicycle sharing system: health impact modelling study

BMJ 2014; 348 doi: http://dx.doi.org/10.1136/bmj.g425 (Published 13 February 2014) Cite this as: BMJ 2014;348:g425

Re: Health effects of the London bicycle sharing system: health impact modelling study

Dear Editors,

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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[5] Curr Urol Rep. 2007 Nov;8(6):491-7.
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[6] BJU Int. 2007 Jan;99(1):135-40.
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Institute for Sexual Medicine, Department of Urology, Boston University School of Medicine, 720 Harrison Avenue, Suite 600, Boston, MA 02118, USA.
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[8] J Sex Med. 2005 Sep;2(5):596-604.
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[9] J Urol. 2004 Aug;172(2):637-41.
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Department of Epidemiology, School of Public Health and Community Medicine, University of Washington and Department of Urology, Virginia Mason Medical Center, Seattle, USA.
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Department of Urology, Meir Medical Center, Affiliated to Sackler School of Medicine, Tel Aviv University, 59 Tchernichovski st., Kfar Saba, Israel.
http://www.ncbi.nlm.nih.gov/pubmed/15716187

[11] J Appl Physiol. 1984 Jun;56(6):1453-63.
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Competing interests: No competing interests

10 March 2014
Stavros Saripanidis
Consultant in Obstetrics and Gynaecology
Private Surgery
Thessaloniki, Greece
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