{"id":{"repo_id":"uwo","oai_identifier":"oai:uwo.scholaris.ca:20.500.14721/29357"},"canonical_url":"https://search.dev.ndltd.org/etd/uwo/oai:uwo.scholaris.ca:20.500.14721/29357","repository":{"repo_id":"uwo","name":"Western University","base_url":"https://uwo.scholaris.ca/server/oai/request"},"display":{"title":"Using the Health Action Process Approach (HAPA) to understand and change sedentary behaviour in office workers: Effects on motivation, behaviour, and health outcomes","abstract":"Sedentary behaviour (SB) is positively associated with all-cause mortality, as well as numerous chronic diseases, including fatal and non-fatal cardiovascular disease, type 2 diabetes, certain types of cancer, and metabolic syndrome. Interventions targeting reductions in sedentary time among office workers who are an at-risk population for high levels of SB are needed. The main objective of this dissertation was to contribute to the body of knowledge surrounding theory-based behavioural interventions targeting SB among office working adults. First, a systematic review of the literature (study 1, chapter 2) was conducted that highlighted important cognitive and motivational factors associated with SB, which should be targeted in theory-based interventions designed to reduce SB. Using the motivational phase of the Health Action Process Approach (HAPA), a randomized controlled trial (RCT – study 2, chapter 3) demonstrated that SB and diabetes information can be a meaningful source of motivation among preintender office workers (n = 96). Those in the intervention reported significantly higher intentions for reducing daily sedentary time (ps ≤ .05, ɳp2 values ≥ .08) than their control counterparts. Using the volitional phase of the HAPA, a subsequent RCT (study 3, chapter 4) showed that action and coping planning, augmented with tailored text messages reduced workplace sitting time and increased specific non-SBs in office workers (n = 60). Relative to the controls, participants who received the intervention reported significantly greater reductions in time spent sitting (87.54 min/workday) and accompanying increases in time spent standing (32.56 min/workday) and stretching (11.34 min/workday) at work over an 8-week period (ps < .05, ɳp2 range = .05-.08). Finally, study 3 (chapter 4) also revealed that the intervention targeting reductions in SB can lead to significant improvements in office workers’ perceived emotional well-being and role limitations due to emotional health problems (ps < .05, ɳp2 range = .08-.10). Avenues for future research will be discussed.","abstract_html":"Sedentary behaviour (SB) is positively associated with all-cause mortality, as well as numerous chronic diseases, including fatal and non-fatal cardiovascular disease, type 2 diabetes, certain types of cancer, and metabolic syndrome. Interventions targeting reductions in sedentary time among office workers who are an at-risk population for high levels of SB are needed. The main objective of this dissertation was to contribute to the body of knowledge surrounding theory-based behavioural interventions targeting SB among office working adults. First, a systematic review of the literature (study 1, chapter 2) was conducted that highlighted important cognitive and motivational factors associated with SB, which should be targeted in theory-based interventions designed to reduce SB. Using the motivational phase of the Health Action Process Approach (HAPA), a randomized controlled trial (RCT – study 2, chapter 3) demonstrated that SB and diabetes information can be a meaningful source of motivation among preintender office workers (n = 96). Those in the intervention reported significantly higher intentions for reducing daily sedentary time (ps ≤ .05, ɳp2 values ≥ .08) than their control counterparts. Using the volitional phase of the HAPA, a subsequent RCT (study 3, chapter 4) showed that action and coping planning, augmented with tailored text messages reduced workplace sitting time and increased specific non-SBs in office workers (n = 60). Relative to the controls, participants who received the intervention reported significantly greater reductions in time spent sitting (87.54 min/workday) and accompanying increases in time spent standing (32.56 min/workday) and stretching (11.34 min/workday) at work over an 8-week period (ps &lt; .05, ɳp2 range = .05-.08). Finally, study 3 (chapter 4) also revealed that the intervention targeting reductions in SB can lead to significant improvements in office workers’ perceived emotional well-being and role limitations due to emotional health problems (ps &lt; .05, ɳp2 range = .08-.10). Avenues for future research will be discussed.","abstract_has_math":false,"creators":["Rollo, Andrew Scott"],"institution":"The University of Western Ontario","degree_name":"Ph D","degree_level":null,"degree_discipline":"Kinesiology","degree_department":null,"school":null,"contributors":[],"advisors":["Prapavessis, Harry"],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-08-16","date_published":"2019-08-16","updated_at":"2026-07-27T21:56:16Z","subjects":["sedentary behaviour","office workers","Health Action Process Approach","motivation","intervention","health behaviour change"],"languages":["en_ca"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14721/29357","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Prapavessis, Harry"]},{"key":"dc:creator","label":"Author","values":["Rollo, Andrew Scott"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-07-10T16:20:37Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-07-10T16:20:37Z"]},{"key":"dc:date.issued","label":"Date","values":["2019-08-16"]},{"key":"dc:publisher","label":"Institution","values":["The University of Western Ontario"]},{"key":"dc:type","label":"Dc Type","values":["thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Kinesiology"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph D"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["sedentary behaviour","office workers","Health Action Process Approach","motivation","intervention","health behaviour change"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_ca"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14721/29357"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."]},{"key":"dc:description.abstract","label":"Abstract","values":["Sedentary behaviour (SB) is positively associated with all-cause mortality, as well as numerous chronic diseases, including fatal and non-fatal cardiovascular disease, type 2 diabetes, certain types of cancer, and metabolic syndrome. Interventions targeting reductions in sedentary time among office workers who are an at-risk population for high levels of SB are needed. The main objective of this dissertation was to contribute to the body of knowledge surrounding theory-based behavioural interventions targeting SB among office working adults. First, a systematic review of the literature (study 1, chapter 2) was conducted that highlighted important cognitive and motivational factors associated with SB, which should be targeted in theory-based interventions designed to reduce SB. Using the motivational phase of the Health Action Process Approach (HAPA), a randomized controlled trial (RCT – study 2, chapter 3) demonstrated that SB and diabetes information can be a meaningful source of motivation among preintender office workers (n = 96). Those in the intervention reported significantly higher intentions for reducing daily sedentary time (ps ≤ .05, ɳp2 values ≥ .08) than their control counterparts. Using the volitional phase of the HAPA, a subsequent RCT (study 3, chapter 4) showed that action and coping planning, augmented with tailored text messages reduced workplace sitting time and increased specific non-SBs in office workers (n = 60). Relative to the controls, participants who received the intervention reported significantly greater reductions in time spent sitting (87.54 min/workday) and accompanying increases in time spent standing (32.56 min/workday) and stretching (11.34 min/workday) at work over an 8-week period (ps < .05, ɳp2 range = .05-.08). Finally, study 3 (chapter 4) also revealed that the intervention targeting reductions in SB can lead to significant improvements in office workers’ perceived emotional well-being and role limitations due to emotional health problems (ps < .05, ɳp2 range = .08-.10). Avenues for future research will be discussed."]},{"key":"dc:title","label":"Title","values":["Using the Health Action Process Approach (HAPA) to understand and change sedentary behaviour in office workers: Effects on motivation, behaviour, and health outcomes"]}]}],"canonical_facts":{"dc:contributor.advisor":["Prapavessis, Harry"],"dc:creator":["Rollo, Andrew Scott"],"dc:date.accessioned":["2025-07-10T16:20:37Z"],"dc:date.available":["2025-07-10T16:20:37Z"],"dc:date.issued":["2019-08-16"],"dc:description":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."],"dc:description.abstract":["Sedentary behaviour (SB) is positively associated with all-cause mortality, as well as numerous chronic diseases, including fatal and non-fatal cardiovascular disease, type 2 diabetes, certain types of cancer, and metabolic syndrome. Interventions targeting reductions in sedentary time among office workers who are an at-risk population for high levels of SB are needed. The main objective of this dissertation was to contribute to the body of knowledge surrounding theory-based behavioural interventions targeting SB among office working adults. First, a systematic review of the literature (study 1, chapter 2) was conducted that highlighted important cognitive and motivational factors associated with SB, which should be targeted in theory-based interventions designed to reduce SB. Using the motivational phase of the Health Action Process Approach (HAPA), a randomized controlled trial (RCT – study 2, chapter 3) demonstrated that SB and diabetes information can be a meaningful source of motivation among preintender office workers (n = 96). Those in the intervention reported significantly higher intentions for reducing daily sedentary time (ps ≤ .05, ɳp2 values ≥ .08) than their control counterparts. Using the volitional phase of the HAPA, a subsequent RCT (study 3, chapter 4) showed that action and coping planning, augmented with tailored text messages reduced workplace sitting time and increased specific non-SBs in office workers (n = 60). Relative to the controls, participants who received the intervention reported significantly greater reductions in time spent sitting (87.54 min/workday) and accompanying increases in time spent standing (32.56 min/workday) and stretching (11.34 min/workday) at work over an 8-week period (ps < .05, ɳp2 range = .05-.08). Finally, study 3 (chapter 4) also revealed that the intervention targeting reductions in SB can lead to significant improvements in office workers’ perceived emotional well-being and role limitations due to emotional health problems (ps < .05, ɳp2 range = .08-.10). Avenues for future research will be discussed."],"dc:identifier.uri":["https://hdl.handle.net/20.500.14721/29357"],"dc:language.iso":["en_ca"],"dc:publisher":["The University of Western Ontario"],"dc:subject":["sedentary behaviour","office workers","Health Action Process Approach","motivation","intervention","health behaviour change"],"dc:title":["Using the Health Action Process Approach (HAPA) to understand and change sedentary behaviour in office workers: Effects on motivation, behaviour, and health outcomes"],"dc:type":["thesis"],"thesis:degree_discipline":["Kinesiology"],"thesis:degree_name":["Ph D"]},"updated_at":"2026-07-27T21:56:16Z"}