Department of Psychology, University of British Columbia, 2136 West Mall, Vancouver, BC, V6T 1Z4, USA.
Herbert Wertheim School of Public Health and Longevity Science, University of California San Diego, 9500 Gillman Drive, San Diego, CA, 92093, USA.
Harm Reduct J. 2021 Apr 29;18(1):48. doi: 10.1186/s12954-021-00496-2.
Prior research examining the relationship between cannabis use, sedentary behavior, and physical activity has generated conflicting findings, potentially due to biases in the self-reported measures used to assess physical activity. This study aimed to more precisely explore the relationship between cannabis use and sedentary behavior/physical activity using objective measures.
Data were obtained from the 2005-2006 National Health and Nutrition Examination Survey. A total of 2,092 participants (ages 20-59; 48.8% female) had accelerometer-measured sedentary behavior, light physical activity, and moderate-to-vigorous physical activity. Participants were classified as light, moderate, frequent, or non-current cannabis users depending on how often they used cannabis in the previous 30 days. Multivariable linear regression estimated minutes in sedentary behavior/physical activity by cannabis use status. Logistic regression modeled self-reported moderate-to-vigorous physical activity in relation to current cannabis use.
Fully adjusted regression models indicated that current cannabis users' accelerometer-measured sedentary behavior did not significantly differ from non-current users. Frequent cannabis users engaged in more physical activity than non-current users. Light cannabis users had greater odds of self-reporting physical activity compared to non-current users.
This study is the first to evaluate the relationship between cannabis use and accelerometer-measured sedentary behavior and physical activity. Such objective measures should be used in other cohorts to replicate our findings that cannabis use is associated with greater physical activity and not associated with sedentary behavior in order to fully assess the potential public health impact of increases in cannabis use.
先前研究考察大麻使用、久坐行为和身体活动之间的关系得出了相互矛盾的结果，这可能是由于用于评估身体活动的自我报告测量存在偏差。本研究旨在使用客观测量方法更准确地探索大麻使用与久坐行为/身体活动之间的关系。
数据来自 2005-2006 年全国健康和营养调查。共有 2092 名参与者（年龄 20-59 岁；48.8%为女性）进行了加速度计测量的久坐行为、低强度身体活动和中高强度身体活动。参与者根据过去 30 天内使用大麻的频率分为轻、中、频繁或非当前大麻使用者。多变量线性回归估计按大麻使用状况划分的久坐行为/身体活动分钟数。逻辑回归模型分析了与当前大麻使用相关的自我报告的中高强度身体活动。
完全调整的回归模型表明，当前大麻使用者的加速度计测量的久坐行为与非当前使用者无显著差异。频繁大麻使用者的身体活动量多于非当前使用者。与非当前使用者相比，轻量大麻使用者更有可能报告身体活动。
本研究首次评估了大麻使用与加速度计测量的久坐行为和身体活动之间的关系。应在其他队列中使用此类客观测量方法来复制我们的发现，即大麻使用与更高的身体活动相关，而与久坐行为无关，以充分评估大麻使用增加对公共卫生的潜在影响。
