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

  • Benno Hartung
  • Holger Schwender
  • Eckhard H. Roth
  • Florence Hellen
  • Nona Mindiashvili
  • Annette Rickert
  • Stefanie Ritz-Timme
  • Almut Grieser
  • Fabio Monticelli
  • Thomas Daldrup
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

Authors and Affiliations

  • Benno Hartung
    • 1
  • Holger Schwender
    • 2
  • Eckhard H. Roth
    • 3
  • Florence Hellen
    • 4
  • Nona Mindiashvili
    • 1
  • Annette Rickert
    • 1
  • Stefanie Ritz-Timme
    • 1
  • Almut Grieser
    • 5
  • Fabio Monticelli
    • 6
  • Thomas Daldrup
    • 1
  1. 1.Institute of Legal MedicineUniversity Hospital DüsseldorfDüsseldorfGermany
  2. 2.Institute of MathematicsHeinrich-Heine-UniversityDüsseldorfGermany
  3. 3.Augenzentrum FriedrichstadtDüsseldorfGermany
  4. 4.Department of PsychiatryHeinrich-Heine-UniversityDüsseldorfGermany
  5. 5.Department of AnaesthesiologyUniversity Hospital DüsseldorfDüsseldorfGermany
  6. 6.Institute of Legal MedicineParis-Lodron-UniversitySalzburgAustria