Table 3. Questionnaire specifics used to measure exercise motivation and perceived social support for exercise.

Variables	Specifics	Statements	Response options
Exercise motivation	Nineteen statements where the individuals rate the significance of each statement as a personal motive to engage, or not engage in exercise. Statements were divided into five subscales, and a sum score (from 0 to 4) for each subscale was calculated by adding scores from each statement, divided by the number of statements	“We are interested in the reasons underlying peoples decisions to engage, or not engage in physical exercise. Using the scale below, please indicate to what extent each of the following items is true for you”: Intrinsic regulation: “I exercise because it’s fun”, “I enjoy my exercise sessions”, “I find exercise a pleasurable activity”, “I get pleasure and satisfaction from participating in exercise”, identified regulation: “I value the benefits of exercise”, “It’s important to me to exercise regularly”, “I think it is important to make the effort to exercise regularly”, “I get restless if I don’t exercise regularly”, introjected regulation: “I feel guilty when I don’t exercise”, “I feel ashamed when I miss an exercise session”, “I feel like a failure when I haven’t exercised in a while”, external regulation: “I exercise because other people say I should”, “I take part in exercise because my friends/family/partner say I should”, “I exercise because others will not be pleased with me if I don’t”, “I feel under pressure from my friends/family to exercise”, amotivation: “I don’t see why I should have to exercise”, “I can’t see why I should bother exercising”, “I don’t see the point in exercising”, “I think exercising is a waste of time”	“0 not true for me”, “1”, “2 partly true for me”, “3”, or “4 very true for me”
Social support	Thirteen statements where the individuals rate each statement on how often their family or friends had been supportive of them exercising. A total social support score was calculated (from 6 to 30) using a sum of scores from each of the statements.	“Please rate how often family or friends has said or done what is described during the last three months.”: “Exercised with me”, “Offered to exercise with me”, “Gave me helpful reminders to exercise ("Are you going to exercise tonight?”)”, “Gave me encouragement to stick with my exercise program”, “Changed their schedule so we could exercise together”, “Discussed exercise with me”, “Complained about the time I spend exercising”, “Criticized me or made fun of me for exercising”, “Gave me rewards for exercising (bought me something or gave me something I like)”, “Planned for exercise on recreational outings”, “Helped plan activities around my exercise”, “Asked me for ideas on how they can get more exercise”, “Talked about how much they like to exercise”	“1 none”, “2 rarely”, “3 a few times”, “4 often”, or “5 very often”