Mindful Walking Intervention for Physical Inactivity

Rapid Assessment of Physical Activity Scale: self-report scale of physical activity, with total score ranging from 1-10; higher scores indicate increased activity

Upper and lower muscle strength will be measured with the 30-second arm curl test (number of biceps curls completed while holding a hand weight of 2.27 kg for women and 3.63 kg for men) and the 30-second chair-stand test (Prakhinkit et al. 2014).

Pittsburgh Sleep Quality Index: 19 item self-report measure assessing sleep quality over the past month, total score ranging from 0 to 21, with higher scores indicating worse sleep quality

The back scratch flexibility test (how close the hands can be brought together behind the back) and the chair sit-and-reach test will be used to measure upper and lower limb flexibility, respectively (Prakhinkit et al. 2014).

The timed up-and-go test will be used as a measure of agility (Prakhinkit et al. 2014)

The Star Excursion Balance Test will measure dynamic balance (Gribble, Hertel, and Plisky 2012)

6 minute walk test, measure includes how many meters the individual walks in 6 minutes around a 50-yard course (Prakhinkit et al. 2014)

Perceived Stress Scale: 4 item self-report measure assessing perceived stress over the past month, total score ranges from 4 to 20, higher levels indicating higher levels of stress

Adherence to Refills and Medications Scale: 12 item self-report scale assesses adherence to other medication treatments; scores range from 12-34, where lower scores indicate better adherence (adherence to medications not given as part of this study) (Kripalani et al. 2009)

The Five Facet Mindfulness Questionnaire: 39 self-report items assessing five dimensions of mindfulness. Items are rated on a 5 point scale ranging from 1 to 5, with total score ranging from 39 to 195. Higher scores indicate greater dispositional tendency to be mindful in daily life (e.g., observing, describing, acting with awareness, nonjudging of inner experience, nonreactivity to inner experiences).

Executive Function Index: A 27-item self-report inventory assessing five facets of executive functioning (Spinella, 2005); Items rated "how well the following statement describes me" 1 (not at all) to 5 (very much), range 27-135 with higher scores indicating higher levels of executive functioning.

Additional mindfulness practices engaged in outside of the study sessions over the past month, assessed with four self-report items: 'Did you engage in mindfulness meditation in the past month?', 'How many days per week did you engage in mindfulness meditation?', 'How long in minutes did you meditate per session of mindfulness meditation?', 'Describe your practice of mindfulness meditation (what exercises/activities/techniques did you practice?)

Age, race, ethnicity, marital status, language spoken, highest level of education, employment status, annual household income, health insurance, current smoking

Treatment Satisfaction Survey (Zgierska et al. 2008), 5 item self-report measure, qualitative and quantitative items with quantitative scale ranging from 0 to 16, with higher scores indicating greater satisfaction with mindfulness intervention

Adverse Childhood Experiences Questionnaire: 10 item self-report scale assesses adverse events in the first 18 years of life (Felitti, 1998). Scores range from 0 to 10, with higher scores indicating greater number or adverse events.

Life Events Checklist for DSM-5: 17 self-report items that assess a number of different types of traumatic events across the lifespan and personal occurrence versus learning about a traumatic event (Weathers et al., 2013). There is no formal scoring protocol, although endorsing 1 or more items indicates lifetime exposure to a traumatic event.

The Adult Service Use Schedule: Fifteen open-ended, self-report items assessing use of psychological services, accessibility, and length of service use (Bower et al., 2000).