International Journal of Legal Medicine

, Volume 130, Issue 3, pp 711–721

The effect of cannabis on regular cannabis consumers’ ability to ride a bicycle

Authors

    • Institute of Legal MedicineUniversity Hospital Düsseldorf
  • Holger Schwender
    • Institute of MathematicsHeinrich-Heine-University
  • Eckhard H. Roth
    • Augenzentrum Friedrichstadt
  • Florence Hellen
    • Department of PsychiatryHeinrich-Heine-University
  • Nona Mindiashvili
    • Institute of Legal MedicineUniversity Hospital Düsseldorf
  • Annette Rickert
    • Institute of Legal MedicineUniversity Hospital Düsseldorf
  • Stefanie Ritz-Timme
    • Institute of Legal MedicineUniversity Hospital Düsseldorf
  • Almut Grieser
    • Department of AnaesthesiologyUniversity Hospital Düsseldorf
  • Fabio Monticelli
    • Institute of Legal MedicineParis-Lodron-University
  • Thomas Daldrup
    • Institute of Legal MedicineUniversity Hospital Düsseldorf
Original Article

DOI: 10.1007/s00414-015-1307-y

Cite this article as:
Hartung, B., Schwender, H., Roth, E.H. et al. Int J Legal Med (2016) 130: 711. doi:10.1007/s00414-015-1307-y

Abstract

To assess the effects of cannabis on the ability required to ride a bicycle, repetitive practical cycling tests and medical examinations were carried out before and after inhalative consumption of cannabis. A maximum of three joints with body weight-adapted THC content (300 μg THC per kg body weight) could be consumed by each test subject. Fourteen regular cannabis-consuming test subjects were studied (12 males, 2 females). In summary, only a few driving faults were observed even under the influence of very high THC concentrations. A defined THC concentration that leads to an inability to ride a bicycle cannot be presented. The test subjects showed only slight distinctive features that can be documented using a medical test routinely run for persons under suspicion of driving under the influence of alcohol or drugs.

Keywords

CannabisTHCBicycleAbility to rideAbility to driveDriving under the influenceDUICannabis influence factorCIF

Copyright information

© Springer-Verlag Berlin Heidelberg 2015