Have you heard of “stoned cycling”? Apparently, it refers to the activity of riding a bike under the influence of cannabis. Because of the growing popularity of the term, researchers began to wonder whether biking carries safety risks while high.

What does research have to say?

In an attempt to discover the answer, researchers in American and Germany decided to experiment. They asked 14 test subjects—12 males and 2 females—to cycle through an obstacle course four times—first, while they were sober; second, when they smoked one joint; third, when they smoked two joints; and fourth, when they smoked three joints. The results were then compared and issued in the International Journal of Legal Medicine.


All of the 14 participants were self-reported cannabis users, which means THC (the main ingredient of cannabis) acted on them in a different way than it would for non-marijuana users.

Each of the joint used in the experiment contained 300 mg. of THC per kilogram of body weight and were grown by a Dutch Grower who was licensed by the German government to cultivate cannabis for research use.

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What did the participants do?


The test subjects were requested to inhale the joints for 4secs., hold their breath for 10secs., then exhale for 15 secs. After which, they were asked to bike through the assigned obstacle course. Every time they made a mistake such as running red lights, knocking over barrels, getting off the track, etc., a point would be deducted from their final score.

What was the result?

Road Bicycle Cyclist Helmet Rider Cycling FitnessIt turns out it didn’t matter how much weed the stoned cyclists consumed. The participants only had a few driving faults under the influence of extremely high THC concentrations. This means the researchers found no evidence that proved that consuming THC concentrates can gravely affect cycling.