Does an Acute Bout of Exercise Affect Smoking Topography?
Lung cancer is the leading cause of cancer death in Canadians (Canadian Cancer Society, in
which cigarette smoking is responsible for 85% of these cases. Smoking topography, a key
facet of smoking behaviour, can be subjectively or objectively measured by quantifying puff
volume, maximum puff velocity, interpuff interval, puff duration, number of puffs per
cigarette, and the time to smoke a single cigarette. Smoking topography can estimate
exposure to carcinogenic toxins present in cigarette smoking (Djordjevic, Hoffman, &
Hoffman, 1997). Evidence exists to support that exercise modifies smoking topography
(Katomeri & Taylor 2006; Mikhail, 1983; Reeser, 1983; Zacny & Stitzer, 1985).
Recently, Faulkner and colleagues (2011; N = 18) were the first to implement a handheld
smoking topography device (CReSS Pocket) to measure smoking behaviour in the context of an
acute bout of exercise after a temporary period of abstinence. They found that brisk walking
influences an individual's smoking topography. In specific, participants assigned to the
exercise condition smoked less per puff and took shorter puff durations, compared to the
passive sitting condition. Overall, smoking topographical studies require further
investigation due to methodological flaws in order to allow for the objective collection of
smoking behaviour data and improved external validity in a sufficiently powered study.
Furthermore, the role of cravings, withdrawal and affect as potential mediators of
topographical changes due to exercise is a novel area of research.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Prevention
Smoking topography will be assessed using the Clinical Research Support System (CReSS) Pocket, a computer-based, battery-powered, hand-held unit by Plowshare Technologies®. The CReSS Pocket has an orifice flow meter mouthpiece, and a pressure drop related to the flow rate that is produced when a puff is taken. From the flow rate, the CReSS derives puff count (number of puffs per cigarette), puff volume (the volume of carbon monoxide take in during each puff), puff duration (length of time for each puff), inter-puff interval (amount of time between puffs), and time to first puff.
Harry Prapavessis, Ph.D.
University of Western Ontario, Canada
Canada: Ethics Review Committee