A Video Chat Intervention for Enhancing Self-efficacy for Lifestyle Physical Activity

Lifestyle physical activity will be assessed via the Godin Leisure-Time Exercise Questionnaire (GLTEQ; Godin \& Shephard, 1985), a brief, 4-item measure of physical activity that asks individuals to assess their current frequencies of engaging in strenuous, moderate, and light activities for at least 15 minutes per session during a typical week.Total weekly leisure activity is calculated by the equation: (9*strenuous) + (5*moderate) + (3*light). The second question assesses the frequency of weekly leisure-time activities that are done long enough for the individual to "work up a sweat."

Lifestyle physical activity will be objectively measured using the Fitbit Charge 3 activity and sleep tracker. The Fitbit Charge 3 is a small device that measures all-day activity, distance, floors climbed, and sleep. The participants will be asked to wear the device for seven consecutive days (24 hours/day) prior to the brief in-person assessment and upon completion of the in-person assessment, all participants will be asked to wear the device for the entirety of the six weeks of the study period. Lifestyle physical activity will be assessed through "active minutes," or time spent in moderate-intensity activity.

The Feeling Scale (FS; Hardy \& Rejeski, 1989), consists of a single-item assessing feelings of pleasure-displeasure, ranging from -5 (very bad) to +5 (very good). Participants are asked how the exercise makes them feel. The FS is scored based upon the number provided by the participant, with a possible range of -5 to +5, with higher scores indicating greater feelings experienced.

Anticipated negative emotions will be assessed via the Anticipated Negative Affect Questionnaire (ANAQ; Wang, 2011). The ANAQ asks participants to anticipate how they may feel not regularly participating in physical activity. The ANAQ consists of 5 bi-polar items: "relaxed/tense," "not guilty/guilty," "no regret/regret," "not angry/angry," and "displeased/pleased." The ANAQ scale ranges from 1 to 7. Anticipated negative affect is scored based upon the number provided for each individual question, with higher scores indicating more negative emotions.

Forecasted pleasure will be assessed via one question "If you repeated the exercise session again, how do you think it would make you feel?" (Zenko et al., 2016). Responses are recorded by selecting from 15 empirically spaced anchors, ranging from -100 (most unpleasant imaginable) to +100 (most pleasant imaginable). Forecasted pleasure is scored based upon the number provided by the participant, with a possible range of -100 to +100, with higher scores indicating more pleasant, imaginable feelings.

The Sedentary Behavior Questionnaire (SBQ; Rosenberg et al., 2010) will be used to assess individual's self-reported sedentary behavior. The SBQ assesses the amount of time spent doing nine sedentary behaviors (watching television, playing computer/video games, sitting while listening to music, sitting and talking on the phone, doing paperwork or office work, sitting and reading, playing a musical instrument, doing arts and crafts, sitting and driving/riding in a car, bus, or train). The SBQ assesses sedentary time on a typical weekday and weekend day. Total sedentary behavior is calculated by recoding time reported into hours, then summing the total hours for all nine measures, for the weekday and weekend day. Weekly estimates are calculated by multiplying the weekday hours by (5) and the weekend day hours by (2), and summing together for total sedentary hours per week.

General stress will be assessed via the Perceived Stress Scale (PSS; Cohen, Kamarck, \& Mermelstein, 1983). The PSS is a 10-item questionnaire and scores are obtained by reverse scoring on four positive items and then summing across all items. Each question is based on a 5-point Likert scale, ranging from 0 (never) to 4 (very often). Higher scores indicates higher levels of general stress.

Job stress will be assessed via the Brief Job Stress Questionnaire (BJSQ; Kawada \& Otsuka, 2011). The BJSQ is a 15-item scale that has 4 subscales: evaluation of job demand, job control, support, and degree of job satisfaction. Each question is based on a 4-point Likert scale, ranging from 1 (disagree) to 4 (agree). Each subscale is scored by summing the total items (reverse scoring the job demand subscale), with higher scores being indicative of lower job stress.

The Exercise Planning and Schedule Scale (EPSS; Rovniak, Anderson, Winett, \& Stephens, 2002) is a 10-item questionnaire that assesses exercise scheduling and planning. Each question is based on a 5-point Likert scale, ranging from 1 (does not describe me) to 5 (describes me completely). The EPSS composite score is calculated by reverse-scoring items 2, 3, and 7 then summing and averaging the 10-items to create a composite score. Higher scores indicate more scheduling and planning done for exercise.

The Physical Activity Self-regulation Scale (PASR-12; Umstattd et al., 2009) assesses the degree to which self-regulation strategies are used to support physical activity behavior. The PASR-12 is a 12-item questionnaire and the composite score is calculated by summing the 12-items. There are six subscales within the PASR-12 (calculated by summing the designated items): self-monitoring, goal-setting, social support, reinforcement, time management, and relapse prevention. Higher scores indicate greater strategy-use (either by subscale or composite score of total strategies used).

The Self-efficacy to Regulate Work and Life Questionnaire is a 5-item questionnaire that assesses how confident individuals are in regulating their work and non-work domains (Chan et al., 2016).The five items include: 1) "How confident are you in changing your lifestyle to achieve a good work-life balance?," 2) "How confident are you in finding out how to balance work and life?," 3) "How confident are you in achieving your ideal work-life balance?," 4) "How confident are you in implementing strategies to achieve work-life balance?," and 5) "How confident are you in inventing ways to balance your work and life?." Responses to all items are based on a scale ranging from 0 (cannot do at all) to 100 (highly certain can do). The composite score is calculated by summing and averaging the five items, with higher scores indicating that individuals are more confident in their abilities to cope with work-life challenges.

The Multidimensional Outcome Expectancies for Exercise Scale (MOEES; Wójcicki, White, \& McAuley, 2009) is a 15-item questionnaire that has three subscales: physical outcome expectancies, social outcome expectancies, and self-evaluative outcome expectancies. The MOEES assesses an individual's beliefs or expectations about the benefits of regular exercise. Each question is based on a 5-point Likert scale, ranging from 1 (strongly disagree) to 5 (strongly agree). Each subscale is scored by summing the total items, with higher scores being indicative of higher outcome expectations for exercise.

The work-life balance scale (WLB-6; Gröpel \& Kuhl, 2009) is a 6-item questionnaire that measures perceived sufficiency of time available for work and social life. Each question is based on a 6-point Likert scale, ranging from 1 (completely disagree) to 6 (completely agree). The WLB-6 is scored by reverse coding select items and summing the total items, with higher scores being indicative of high work-life balance.

The Exercise Self-Schema Questionnaire (ESSQ; Kendzierski, 1988) was originally a 9-item scale. We are using a modified version which includes an additional item reflecting self-certainty ratings for each self-description item, as well as an extra question reflecting self-description, -importance, and -certainty with regard to "I am someone who will always be an exerciser" (Mullen, 2011). This version is a 12-item questionnaire and each question is based on an 11-point Likert Scale, ranging from 1 (does not describe me) to 11 (describes me). The ESSQ will be scored by summing and averaging the subscales (self-description, importance, certainty), with higher scores indicating greater exercise schema. Schematics can also be determined by categorizing responses to self-description and importance items that fall within the 8 to 11 range. In this study, change in self-schema will be assessed via changes in mean levels of the continuous variables rather than the dichotomous categorization.

The Sources of Self-efficacy for Physical Activity (Warner et al., 2014) is an 18-item questionnaire that measures mastery experience, self-persuasion, verbal persuasion, vicarious experience, negative affect, and positive affect relative to physical activity. Each question is based on a 4-point Likert Scale, ranging from 1 (strongly disagree) to 4 (strongly agree). The questionnaire is scored by summing and averaging the subscales, with higher scores indicating greater use of self-efficacy sources.