Cannabis and meditation: what happens to attention during yoga?

Meditation and intoxication change experience in different ways

Cannabis can make sensations, thoughts and the passage of time feel different during meditation, but a more absorbing experience does not necessarily mean more stable attention. Meditation is a practice of noticing where attention goes and repeatedly returning it to an intended object, such as breathing. THC can change perception while also disrupting attention and short-term memory. That combination explains why a session may feel unusually vivid without demonstrating better meditation skills.

What returning to the breath is training

In focused-attention meditation, distraction is part of the exercise: a thought appears, the person notices it, and attention returns to the breath. Mindfulness adds an attitude of observing sensations and thoughts without immediately reacting to them. The relevant change is therefore not simply having fewer thoughts or feeling pleasantly detached. It is developing a different relationship with the thoughts that occur.

This also explains why a quiet room, a familiar routine and an instructor can influence a session. They reduce competing demands and give the practice structure. None of these effects requires a cannabinoid, and they complicate attempts to attribute a pleasant group session entirely to cannabis.

Why time can feel expanded

In a placebo-controlled investigation involving 44 people, intravenous THC caused participants to overestimate elapsed seconds and produce shorter time intervals. Frequent users showed blunted effects. This 2013 experiment offers a concrete explanation for why a short meditation can feel unusually long: the subjective clock has changed.

A spacious sense of time can be pleasant, but it measures experience rather than sustained attention. Someone can perceive an interval as rich and extended while losing track of an instruction. Conversely, an ordinary-feeling session can still involve repeated, successful returns to the breath. These are compatible experiences because perceived duration and attentional control are different functions.

[3] THC and time perception — placebo-controlled study

What an attention experiment found

A randomized crossover study of 24 participants published in 2010 found decreasing accuracy and longer reaction times with increasing THC exposure. Brain-response measurements suggested reduced general processing resources rather than a uniform, selective-attention deficit.

That distinction matters during yoga. Hearing an instruction, identifying the movement and adjusting posture form a sequence, even if each step feels effortless. A vivid body sensation does not establish that this sequence has become more accurate. The experiment was a laboratory task, not a yoga class, so it explains an attentional mechanism rather than measuring yoga performance directly.

[4] Böcker et al. — THC and visual attention

Why THC and CBD cannot share one explanation

THC changed time estimation in the 44-person study: participants overestimated elapsed intervals and produced shorter intervals when asked to reproduce a duration. Frequent users showed a blunted response. In the 24-person attention study, THC slowed responses and reduced accuracy. Feeling absorbed in a meditation can therefore coexist with poorer performance on attention tasks.