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The moderate exercise condition will involve participants walking briskly (equivalent to moderate intensity) on a treadmill for 10 minutes. Moderate intensity exercise will be defined as 40-68% of the resting heart rate reserve. Heart rate (HR) will be monitored in participants using a Polar RS100 Heart Rate monitor to serve as a guide for participants to attain the appropriate intensity.

The passive sitting condition will involve participants sitting passively for 10 minutes on a chair. Heart rate (HR) will be monitored in participants of the passive sitting group to help maintain group equivalency (with the moderate exercise condition) in regards to distraction effects and researcher contact.

Participants will be required to walk briskly (equivalent to moderate intensity) on a treadmill for 10 minutes.

Moderate Exercise Group

Participants will be required to sit passively for 10 minutes on a chair.

Passive Sitting Group

Harry Prapavessis, Ph.D.

Smokers will complete questionnaires and smoking behaviour will be examined. After abstaining from smoking for approximately 18 hours, they will be randomized to a moderate intensity exercise group or passive sitting group. Smoking behaviour (time to first puff) will be assessed following treatment.

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.

Effect of an Acute Bout of Exercise on Smoking Topography

Does an Acute Bout of Exercise Affect Smoking Topography?

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.

Changes in cravings, positive and negative affect, and mood and physical symptoms will be assessed using three questionnaires.

University of Western Ontario, Canada

The moderate exercise condition will involve participants waking briskly (equivalent to moderate intensity) on a treadmill for 10 minutes. Moderate intensity exercise is defined as 40-68% of heart rate reserve (HRR). Heart rate (HR) will be monitored using a Polar RS100 Heart Rate monitor to serve as a guide for participants to attain the appropriate intensity.

The passive sitting condition will involve participants sitting passively in a chair for 10 minutes. Heart rate (HR) will be monitored in participants of the passive sitting group to help maintain group equivalency (with the moderate exercise condition) with regards to distraction effects and researcher contact.

Participants will be required to sit passively on a chair for 10 minutes.

Harry Prapavessis, Ph.D

Female and male smokers will complete questionnaires and smoking behavior will be examined. After abstaining from smoking for approximately 18 hours, they will be randomized to a moderate intensity exercise groups or passive sitting group. Smoking satisfaction and smoking behavior will be assessed following treatment.

The hypotheses detailed below are specific to the randomization of participants into the following 2 groups:

1. Moderate exercise (Experimental condition; MEG)
2. Passive sitting (Attention control condition; PSG)

Hypothesis 1: A bout of moderate intensity exercise will be associated with decreased smoking satisfaction after a temporary period of abstinence compared to a control condition.

Hypothesis 2: Smoking topographic measures will mediate the relationship between a bout of moderate intensity exercise and smoking satisfaction.

Lung cancer is the leading cause of cancer death in Canadians (Canadian Cancer Society (CCS), 2010). Cigarette smoking is responsible for 85% of these cases (CCS, 2007). Exercise has been shown to be an effective adjunct to pharmacological cessation strategies (Ussher, Taylor, \& Faulkner, 2008). A recent systematic review concluded that a single bout of low to moderate intensity exercise can help regulate cravings, withdrawal symptoms and negative affect associated with quitting (Taylor, Ussher, \& Faulkner, 2007).

Smoking satisfaction is an immediately reinforcing effect of nicotine. Smoking satisfaction may outweigh the temporally distant adverse health risks of smoking (Cappelleri, Bushmakin, Baker, Merikle, Olufade, \& Gilbert, 2007). Varenicline, an alpha 4-beta-2 nAChR partial agonist, mimics the effect of nicotine by reducing cravings and withdrawal symptoms (Coe et al., 2005). A 12-week treatment period of varenicline has been shown to reduce smoking satisfaction (Jorenby et al., 2006). However, the effect of acute exercise on smoking satisfaction is not yet known.

Smoking topography is a key facet of smoking behaviour. Smoking behaviour can be subjectively or objectively measured by quantifying puff volume, maximum puff velocity, inter-puff interval, puff duration, number of puffs per cigarette and 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).

Effect of an Acute Bout of Exercise on Smoking Satisfaction

Does an Acute Bout of Exercise Affect Smoking Satisfaction?

Smoking satisfaction will be assessed using the 12-item modified version of the Cigarette Evaluation Questionnaire (mCEQ; Cappelleri, Bushmakin, Baker, Merikle, Olufade \& Gilbert, 2007).

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 taken 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.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Effect of an Acute Bout of Exercise on Smoking Topography	NCT01431365	Cancer	Moderate Exerci... Passive Sitting...	18 Years - 65 Years	University of Western Ontario, Canada
Effect of an Acute Bout of Exercise on Smoking Satisfaction	NCT01417975	Cancer	Moderate Exerci... Passive Sitting...	18 Years - 64 Years	University of Western Ontario, Canada

Spots Global Cancer Trial Database for moderate exercise group