“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”, states the study’s abstract.“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”.
According to researchers; “Hardly any coordinative disturbances could be detected under the influence of high or very high THC concentrations. A defined THC concentration that leads to an inability to ride a bicycle cannot be presented.”
They conclude; “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.”
Read more http://thejointblog.com/25240-2/