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1.
BMC Public Health ; 24(1): 2658, 2024 Sep 28.
Article in English | MEDLINE | ID: mdl-39342204

ABSTRACT

BACKGROUND: Falls are the leading cause of injury related morbidity and mortality in older adults. Primary and secondary prevention strategies that address modifiable risk factors are critically important to reduce the number of falls and fall related injuries. A number of evidence-based fall prevention programs are available, but few offer potential for broad dissemination and public health impact due to implementation barriers, such as a need for trained program leaders and clinicians. METHODS: The study will use a randomized controlled trial design to evaluate incorporating physical therapy exercises (primary prevention strategy) within an existing intervention called Walk with Ease. While Walk with Ease has an established evidence-base related to the management of arthritis pain and symptoms, the present study will determine the potential to also reduce falls and fall risk in community-dwelling older adults. The integrated process and outcome evaluation will determine the relative effectiveness of individually-prescribed exercises (compared to standardized exercises) as well as the potential of 'habit training' resources (relative to generic behavior prompts) to improve compliance with exercises in this population. DISCUSSION: The study, conducted through a local clinical-community partnership will advance both the science and practice of community-based fall prevention programming, while also informing implementation strategies needed to promote broader dissemination. TRIAL REGISTRATION: ClinicalTrials.gov, NCT05693025, Registered January 20, 2023, Updated March 1, 2023.


Subject(s)
Accidental Falls , Exercise Therapy , Walking , Aged , Female , Humans , Male , Accidental Falls/prevention & control , Exercise Therapy/methods , Independent Living , Outcome and Process Assessment, Health Care , Program Evaluation , Randomized Controlled Trials as Topic
2.
J Behav Med ; 47(5): 804-818, 2024 Oct.
Article in English | MEDLINE | ID: mdl-39014034

ABSTRACT

Planning-based interventions are often used to help individuals form habits. Existing literature suggests a one-size-fits all approach to habit formation, but planning interventions may be optimized if tailored to individual differences and/or behavioral complexity. We test the hypothesis that planning to do a relatively complex behaviour (exercise) at a time that matches an individuals' diurnal preference will facilitate behavioral engagement; whereas for a simpler behaviour (calcium supplementation), the optimal time-of-day for a new behavior will occur in the morning. Young, women volunteers (N = 317) were randomly assigned to take calcium supplements or to exercise for 4 weeks and to control (no planning) or to one of three planning interventions (morning plan; evening plan; unassigned-time plan). Participants reported diurnal preference at baseline and habit strength and behavioral frequency weekly. Fitbit Zips and Medication Event Monitoring System Caps (MEMS) were used to objectively assess behavioral engagement. Multilevel modelling found that calcium-supplementation was greatest for morning-types in the morning-cue condition, whereas exercise was greatest for morning-types with morning cues and evening-types with evening cues. Habit-formation strategies may depend on diurnal preference and behavioral complexity. Future research can evaluate the role of other individual differences.


Subject(s)
Circadian Rhythm , Exercise , Habits , Humans , Female , Adult , Exercise/psychology , Young Adult , Circadian Rhythm/physiology , Dietary Supplements , Health Behavior , Calcium, Dietary/administration & dosage
3.
J Behav Med ; 46(4): 632-641, 2023 08.
Article in English | MEDLINE | ID: mdl-36662351

ABSTRACT

Habit strength for taking medication is associated with medication adherence. However, habit strength is typically measured via self-reports, which have limitations. Objective sensors may provide advantages to self-reports. To evaluate whether habit-strength metrics derived from objective sensor data (MEMS® Caps; AARDEX Group) are associated with self-reported habit strength and adherence (objective and self-reported) and whether objective and self-reported habit strength are independently associated with adherence. Patients (N = 79) on oral medications for type 2 diabetes completed self-reports of habit strength and medication adherence and used MEMS® Caps to take their prescribed medication for one month. MEMS® Caps data were used to create five objective metrics of habit strength (e.g., individual-level variance in pill timing) and quantify medication adherence (% days correct dosing). Consistency in behavior from week to week (versus across each day) had the greatest association with self-reported habit strength (r(78) = 0.29, p = 0.01), self-reported adherence (r(78) = 0.32, p = 0.005), and objective adherence (r(78) = 0.61, p < 0.001). Objective and self-reported habit strength were independently associated with adherence. Weekly pill-timing consistency may be more useful than daily pill-timing consistency for predicting adherence and understanding patients' medication-taking habits. Self-reports and objective metrics of habit strength may be measuring different constructs, warranting further research.


Subject(s)
Diabetes Mellitus, Type 2 , Humans , Diabetes Mellitus, Type 2/drug therapy , Benchmarking , Medication Adherence , Self Report , Habits
4.
Ann Behav Med ; 55(3): 280-285, 2021 03 20.
Article in English | MEDLINE | ID: mdl-32542355

ABSTRACT

BACKGROUND: Many of our daily behaviors are habitual, occurring automatically in response to learned contextual cues, and with minimal need for cognitive and self-regulatory resources. Behavioral habit strength predicts adherence to actions, including to medications. The time of day (morning vs. evening) may influence adherence and habit strength to the degree that stability of contexts/routines varies throughout the day. PURPOSE: The current study evaluates whether patients are more adherent to morning versus evening doses of medication and if morning doses show evidence of greater habit strength than evening doses. METHODS: Objective adherence data (exact timing of pill dosing) were collected in an observational study by electronic monitoring pill bottles in a sample of patients on twice-daily pills for Type 2 diabetes (N = 51) over the course of 1 month. RESULTS: Data supported the hypothesis that patients would miss fewer morning than evening pills. However, counter to the hypothesis, variability in dose timing (an indicator of habit strength) was not significantly different for morning versus evening pills. CONCLUSIONS: Findings suggest that medication adherence may be greater in the morning than in the evening. However, more research is needed to evaluate the role of habitual action in this greater adherence. Furthermore, future research should evaluate the validity of behavioral timing consistency as an indicator of habit strength.


Subject(s)
Habits , Medication Adherence , Adult , Aged , Female , Humans , Male , Middle Aged , Time Factors
5.
Behav Med ; 47(2): 89-98, 2021.
Article in English | MEDLINE | ID: mdl-31369356

ABSTRACT

Introjected regulation has been inconsistently linked to physical activity, which may be due to it being an umbrella construct for different types of introjected regulation that have the potential to be differentially related to behavior. We evaluated (1) whether self-oriented approach, self-oriented avoidance, other-oriented approach, and other-oriented avoidance were distinct constructs from one another and from identified regulation, and (2) whether the following were related to physical activity engagement from strongest to weakest: self-oriented approach, self-oriented avoidance, other-oriented approach, and other-oriented avoidance. Behavioral regulations were measured at baseline, physical activity was measured via self-report at baseline and follow-up, and using daily diaries (N = 336). A factor analysis revealed a four-factor solution: general approach, self-oriented avoidance, other-oriented avoidance, and identified regulation. Self-oriented avoidance was the strongest predictor of physical activity, followed by general approach, and other-oriented avoidance. Including measures that capture these subdimensions of introjected regulation in future research has the potential to clarify inconsistent relationships in the literature.


Subject(s)
Motivation , Motor Activity , Exercise , Humans , Leisure Activities , Self Report
6.
Ann Behav Med ; 54(12): 915-919, 2020 12 01.
Article in English | MEDLINE | ID: mdl-33416844

ABSTRACT

This introduction to the special issue outlines key ways that behavioral medicine researchers can accelerate their science. The authors highlight the 2020 Society of Behavioral Medicine's annual meeting plenary sessions, that fit this theme.


Subject(s)
Behavioral Medicine , Congresses as Topic , Societies, Medical , Behavioral Medicine/trends , Humans
7.
Int J Behav Med ; 26(6): 665-672, 2019 Dec.
Article in English | MEDLINE | ID: mdl-31701389

ABSTRACT

BACKGROUND: Medically unexplained syndromes (MUS) are both prevalent and disabling. While illness beliefs and behaviors are thought to maintain MUS-related disability, little is known about which specific behavioral responses to MUS are related to disability or the way in which beliefs and behaviors interact to impact functioning. The purpose of the present study was to examine the relationship between illness beliefs and disability among patients with MUS, and assess the extent to which behaviors mediate this relationship. METHODS: The study examined data from the baseline assessment of a multi-site randomized controlled trial (RCT). Participants were 248 veterans with MUS. Illness beliefs, behavioral responses to illness, and disability were assessed through self-report questionnaire. Data were analyzed using mediation analysis. RESULTS: Threat-related beliefs predicted greater disability through decreased activity and increased practical support seeking. Protective beliefs predicted less disability through reductions in all-or-nothing behavior and limiting behavior. CONCLUSIONS: These outcomes suggest that all-or-nothing behavior, limiting behavior, and practical support seeking are important in the perpetuation of disability among those with MUS. This has implications for improving MUS treatment by highlighting potential treatment targets. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT02161133.


Subject(s)
Adaptation, Psychological , Occupational Diseases/psychology , Somatoform Disorders/psychology , Veterans/psychology , Adult , Culture , Female , Health Behavior , Humans , Male , Medically Unexplained Symptoms , Middle Aged , Randomized Controlled Trials as Topic , Surveys and Questionnaires
8.
J Couns Psychol ; 66(6): 678-689, 2019 Nov.
Article in English | MEDLINE | ID: mdl-31204835

ABSTRACT

Little is known about what predicts student service members' and veterans' (SSM/V) adjustment to college. In qualitative research, SSM/V report feeling they do not belong and are misunderstood by college communities, a phenomenon that counseling psychologists call cultural incongruity. The goal of the current study was to quantitatively examine the relationship between cultural incongruity and adjustment to college. We surveyed 814 SSM/V about their adjustment to college using the Student Adaptation to College Questionnaire. Cultural incongruity was operationalized in two ways: feelings of not belonging were measured via direct report and the association with adjustment to college assessed with regression. Feelings of being misunderstood about academic barriers were assessed by comparing SSM/V's perceptions of academic barriers and SSM/V's perceptions of how others view the SSM/V's academic barriers and the association with adjustment was assessed using polynomial regression and response surface analysis. Cultural incongruity predicted adjustment to college. After controlling for other known predictors, feelings of not belonging accounted for 18% of the variance in adjustment to college. Polynomial regression showed that feeling understood about academic barriers protected against the negative impact of the barrier on adjustment to college. Cultural incongruity predicts adjustment to college for SSM/V. Helping SSM/V feel their unique barriers to college adjustment are understood may blunt the impact of these barriers. (PsycINFO Database Record (c) 2019 APA, all rights reserved).


Subject(s)
Cultural Characteristics , Motivation , Self Report , Students/psychology , Universities , Veterans/psychology , Adolescent , Adult , Aged , Aged, 80 and over , Cross-Sectional Studies , Emotions/physiology , Female , Forecasting , Humans , Middle Aged , Motivation/physiology , Social Support , Young Adult
9.
Couns Psychol ; 47(5): 770-795, 2019 Jul 01.
Article in English | MEDLINE | ID: mdl-32015569

ABSTRACT

Medically unexplained symptoms (MUS) are common among veterans and are difficult to treat. Optimal treatment entails continued care from providers, including primary care and counseling psychologists. Non-concordance between veterans' and providers' views of MUS may contribute to poor veteran satisfaction with care and possibly disengagement with care (e.g., non-adherence to treatment recommendations, including counseling and graded exercise). The current study surveyed 243 veterans with MUS post-deployment and evaluated the degree of non-concordance perceived by veterans with their primary care providers regarding their MUS and the effect of perceived non-concordance on treatment behaviors and outcomes. Many veterans in the current sample perceived non-concordance with their provider regarding their MUS (19% reporting quite a bit or complete disagreement). Perceived non-concordance (regarding MUS overall and specific causal perceptions) predicted important outcomes of interest, particularly veterans' satisfaction with their provider. Perceived concordance with primary care doctors may be required for sufficient adherence to MUS treatment recommendations, such as seeking and maintaining psychological counseling. Research should evaluate the effect of perceived concordance with the counseling psychologist on adherence to and outcomes from counseling for MUS.

10.
Couns Psychol ; 47(5): 741-769, 2019 Jul 01.
Article in English | MEDLINE | ID: mdl-32015568

ABSTRACT

Medically unexplained symptoms and syndromes (MUS) affect the health of 20%-30% of patients seen in primary care. Optimally, treatment for these patients requires an interdisciplinary team consisting of both primary care and mental health providers. By developing an expertise in MUS, counseling psychologists can improve the care of patients with MUS who are already in their practice, expand the number of patients they help, and enhance the integration of counseling psychology into the broader medical community. Additionally, counseling psychologists' expertise in culture, attunement to therapeutic processes, and our focus on prioritizing patients' perspectives and quality of life can fill the gap in research on MUS and bringing increased attention to counseling psychologists' unique contributions to health service delivery.

11.
Ann Behav Med ; 52(2): 146-156, 2018 02 05.
Article in English | MEDLINE | ID: mdl-29538631

ABSTRACT

Background: The Necessity-Concerns Framework (NCF) is a multidimensional theory describing the relationship between patients' positive and negative evaluations of their medication which interplay to influence adherence. Most studies evaluating the NCF have failed to account for the multidimensional nature of the theory, placing the separate dimensions of medication "necessity beliefs" and "concerns" onto a single dimension (e.g., the Beliefs about Medicines Questionnaire-difference score model). Purpose: To assess the multidimensional effect of patient medication beliefs (concerns and necessity beliefs) on medication adherence using polynomial regression with response surface analysis. Methods: Community-dwelling older adults >65 years (n = 1,211) presenting their own prescription for antihypertensive medication to 106 community pharmacies in the Republic of Ireland rated their concerns and necessity beliefs to antihypertensive medications at baseline and their adherence to antihypertensive medication at 12 months via structured telephone interview. Results: Confirmatory polynomial regression found the difference-score model to be inaccurate; subsequent exploratory analysis identified a quadratic model to be the best-fitting polynomial model. Adherence was lowest among those with strong medication concerns and weak necessity beliefs, and adherence was greatest for those with weak concerns and strong necessity beliefs (slope ß = -0.77, p<.001; curvature ß = -0.26, p = .004). However, novel nonreciprocal effects were also observed; patients with simultaneously high concerns and necessity beliefs had lower adherence than those with simultaneously low concerns and necessity beliefs (slope ß = -0.36, p = .004; curvature ß = -0.25, p = .003). The difference-score model fails to account for the potential nonreciprocal effects. Conclusion: Results extend evidence supporting the use of polynomial regression to assess the multidimensional effect of medication beliefs on adherence.


Subject(s)
Antihypertensive Agents/administration & dosage , Health Knowledge, Attitudes, Practice , Hypertension/drug therapy , Medication Adherence/statistics & numerical data , Aged , Aged, 80 and over , Female , Follow-Up Studies , Humans , Male , Regression Analysis
12.
Psychol Sport Exerc ; 30: 55-63, 2017 May.
Article in English | MEDLINE | ID: mdl-28966555

ABSTRACT

OBJECTIVE: E-diaries and accelerometers promise more objective, real-time measurements of health behavior. However, social-psychological theory suggests that using electronic behavioral monitoring may influence rather than just record physical activity (PA), especially when a device is novel. DESIGN: Participants (n=146) were randomly assigned to either an accelerometer-only, e-diary-only, accelerometer+e-diary, or a no-technology control group for one week to assess how these technologies influenced PA, both perceived and actual, in young adults. METHOD: Participants reported their PA, overall and number of discrete exercise sessions (DES) at baseline and follow-up; accelerometers provided daily step counts and e-diaries captured daily reports of PA for the active week of the study. RESULTS: Average daily steps in the accelerometer-only and accelerometer+e-diary groups did not differ nor did daily reports of PA via e-diary compared to accelerometer+e-diary group, showing that neither technology affected actual PA. ANCOVAS tested group differences in perceived PA; The accelerometer-only group had increased perceived overall PA but not DES compared to no-technology control. CONCLUSIONS: Accelerometers may increase perceived overall PA, but the tested technologies did not increase DES or actual PA, suggesting that they may be viable unbiased measures of PA.

13.
J Behav Med ; 39(6): 935-946, 2016 Dec.
Article in English | MEDLINE | ID: mdl-27515801

ABSTRACT

The Common-Sense Model of Self-Regulation (the "Common-Sense Model", CSM) is a widely used theoretical framework that explicates the processes by which patients become aware of a health threat, navigate affective responses to the threat, formulate perceptions of the threat and potential treatment actions, create action plans for addressing the threat, and integrate continuous feedback on action plan efficacy and threat-progression. A description of key aspects of the CSM's history-over 50 years of research and theoretical development-makes clear the model's dynamic underpinnings, characteristics, and assumptions. The current article provides this historical narrative and uses that narrative to highlight dynamic aspects of the model that are often not evaluated or utilized in contemporary CSM-based research. We provide suggestions for research advances that can more fully utilize these dynamic aspects of the CSM and have the potential to further advance the CSM's contribution to medical practice and patients' self-management of illness.


Subject(s)
Illness Behavior , Models, Psychological , Self Care/history , Self Care/psychology , History, 20th Century , History, 21st Century , Humans
14.
J Behav Med ; 39(6): 1076-1091, 2016 Dec.
Article in English | MEDLINE | ID: mdl-26980098

ABSTRACT

Non-adherence to health behaviors required for chronic illness self-management is pervasive. Advancing health-behavior theory to include behavioral initiation and maintenance factors, including reflective (e.g., belief- and feedback-based) and automatic (e.g., habit-based) mechanisms of adherence to different treatment-related behaviors could improve non-adherence prediction and intervention efforts. To test behavioral initiation and maintenance factors from an extended common sense self-regulation theoretical framework for predicting medication adherence and physical activity among patients with Type 2 diabetes. Patients (n = 133) in an in-person (n = 80) or online (n = 53) version of the study reported treatment-related (1) barriers, (2) beliefs and experiential feedback (reflective mechanisms of treatment-initiation and short-term repetition), and (3) habit strength (automatic mechanism of treatment-maintenance) for taking medication and engaging in regular physical activity at baseline. Behaviors were assessed via self-reports (n = 133) and objectively (electronic monitoring pill bottles, accelerometers; n = 80) in the subsequent month. Treatment-specific barriers and habit strength predicted self-reported and objective adherence for both behaviors. Beliefs were inconsistently related to behavior, even when habits were "weak". Experiential feedback from behavior was not related to adherence. Among patients with Type 2 diabetes diagnosis, medication and physical activity adherence were better predicted by their degree of automatic behavioral repetition than their beliefs/experiences with the treatment-actions. Habit strength should be an intervention target for chronic illness self-management; assessing it in practice settings may effectively detect non-adherence to existing treatment-regimens. However, future research and further refining of CS-SRM theory regarding the processes required for such habit development are needed.


Subject(s)
Chronic Disease/psychology , Exercise/psychology , Habits , Health Behavior , Medication Adherence/psychology , Self Care/psychology , Diabetes Mellitus, Type 2/psychology , Female , Humans , Male , Middle Aged
16.
Ann Behav Med ; 48(1): 7-16, 2014 Aug.
Article in English | MEDLINE | ID: mdl-24500078

ABSTRACT

BACKGROUND: Patients' medication-related concerns and necessity-beliefs predict adherence. Evaluation of the potentially complex interplay of these two dimensions has been limited because of methods that reduce them to a single dimension (difference scores). PURPOSE: We use polynomial regression to assess the multidimensional effect of stroke-event survivors' medication-related concerns and necessity beliefs on their adherence to stroke-prevention medication. METHODS: Survivors (n = 600) rated their concerns, necessity beliefs, and adherence to medication. Confirmatory and exploratory polynomial regression determined the best-fitting multidimensional model. RESULTS: As posited by the necessity-concerns framework (NCF), the greatest and lowest adherence was reported by those necessity weak concerns and strong concerns/weak Necessity-Beliefs, respectively. However, as could not be assessed using a difference-score model, patients with ambivalent beliefs were less adherent than those exhibiting indifference. CONCLUSIONS: Polynomial regression allows for assessment of the multidimensional nature of the NCF. Clinicians/Researchers should be aware that concerns and necessity dimensions are not polar opposites.


Subject(s)
Health Knowledge, Attitudes, Practice , Medication Adherence/psychology , Models, Psychological , Stroke/drug therapy , Stroke/psychology , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Medication Adherence/statistics & numerical data , Middle Aged , Regression Analysis , Survivors/psychology
17.
Psychol Health Med ; 19(5): 519-24, 2014.
Article in English | MEDLINE | ID: mdl-24219030

ABSTRACT

Perceptions that stress causes and stress-reduction controls hypertension have been associated with poorer blood pressure (BP) control in hypertension populations. The current study investigated these "stress-model perceptions" in stroke survivors regarding prevention of recurrent stroke and the influence of these perceptions on patients' stroke risk factor control. Stroke and transient ischemic attack survivors (N=600) participated in an in-person interview in which they were asked about their beliefs regarding control of future stroke; BP and cholesterol were measured directly after the interview. Counter to expectations, patients who endorsed a "stress-model" but not a "medication-model" of stroke prevention were in better control of their stroke risk factors (BP and cholesterol) than those who endorsed a medication-model but not a stress-model of stroke prevention (OR for poor control=.54, Wald statistic=6.07, p=.01). This result was not explained by between group differences in patients' reported medication adherence. The results have implications for theory and practice, regarding the role of stress belief models and acute cardiac events, compared to chronic hypertension.


Subject(s)
Health Knowledge, Attitudes, Practice , Hypertension/psychology , Ischemic Attack, Transient/psychology , Stroke/psychology , Adult , Aged , Aged, 80 and over , Female , Humans , Ischemic Attack, Transient/prevention & control , Male , Medication Adherence/psychology , Middle Aged , Risk Factors , Secondary Prevention , Stress, Psychological/psychology , Stroke/prevention & control , Survivors/psychology
18.
PEC Innov ; 5: 100344, 2024 Dec 15.
Article in English | MEDLINE | ID: mdl-39323932

ABSTRACT

Older adults face unique barriers and challenges related to physical activity (PA) participation. Motivational interviewing (MI) is a commonly used health coaching strategy to support behavior change that holds potential for older adults. Previous research on MI strategies has focused primarily on face-to-face delivery, limiting insights regarding virtual programs. Objectives: The purpose of this study was to determine if MI could be delivered telephonically with high fidelity and high acceptability in older adult participants. The study is designed to inform future trials evaluating its effectiveness in supporting virtual PA programs. Methods: This study evaluated the feasibility and acceptability of telephonic MI among older adults that enrolled in an online version of the Walk with Ease program. Results: Of 39 participants referred, 29 enrolled and 27 provided feedback. Participants were highly accepting and adherent, with 74 % of patients attending at least five of six sessions, and 96 % of participants indicating satisfaction with the MI provided. Coaches improved program enjoyment by helping set effective goals and providing ongoing accountability. Conclusions: Evaluations documented adequate fidelity and high acceptability of telephonic delivery, and motivation results revealed large, significant increases in autonomous regulation (quality of motivation). Innovation: Telephonic MI using non-healthcare professional coaches is feasibly delivered with high fidelity, and is acceptable to older adult participants. The innovative delivery format offers novel opportunities supporting virtual and telehealth interventions to reduce chronic disease risk among older adults.

19.
Article in English | MEDLINE | ID: mdl-39354798

ABSTRACT

Interventions often fail to achieve long-term behavioral maintenance. Utilizing motivational and volitional strategies to promote behavioral maintenance factors may improve this. Using a full-factorial experiment, we tested the effects of three intervention components (focused on intrinsic motivation and identity, exercise preparation habit, and exercise instigation habit) on exercise participation over a year, among new users (N = 751; 91% identifying as female, 54% identifying as White race) of a global, online exercise class platform, run by Les Mills International Ltd, called LM+. We also tested the intervention components' theoretical mechanisms of action-habit formation, intrinsic motivation, identity, and self-efficacy. Multi-level models found some support for a main effect of the exercise preparation habit intervention component in promoting self-reported and objective exercise participation (behavioral outcomes measured via monthly surveys and the LM+ platform; mechanisms measured via monthly surveys)-in particular online exercise class frequency (fixed effect estimate = 0.84, p < 0.05, and = 0.12, p < 0.05, respectively). The preparation habit component also significantly increased preparation habit strength (0.30, p < 0.05) and instigation habit strength (0.33, p < 0.05). Other expected effects were nonsignificant. Helping individuals form an exercise preparation habit may facilitate initiating and maintaining exercise over time, in particular for attending online exercise classes, potentially through promoting greater preparation and exercise instigation habit strength.

20.
Psychol Sport Exerc ; 73: 102642, 2024 07.
Article in English | MEDLINE | ID: mdl-38615899

ABSTRACT

Many adults with major depressive disorder (MDD) do not receive effective treatment. The potential benefits of resistance exercise training (RET) are understudied and may be mechanistically related to cerebral blood flow changes. PURPOSE: To assess feasibility, acceptability, and preliminary efficacy of a 16-week, theory-informed RET trial for the treatment of MDD and explore changes in cerebral blood flow. METHODS: Ten adults with DSM-5-diagnosed MDD were enrolled in a single-arm, 16-week, twice-weekly, whole-body RET intervention, consistent with US and WHO Physical Activity resistance exercise guidelines. To build intrinsic motivation and develop exercise-preparatory habits, motivators and commitment were discussed weekly. Screening, enrollment, and intervention attendance and compliance rates documented feasibility. At baseline and weeks 8, 16, and 26, current MDD diagnosis, clinician-rated, and self-reported symptom severity were evaluated along with cerebral blood flow which was assessed as middle cerebral artery (MCA) mean blood velocity, conductance, and pulsatility. RESULTS: Nine participants completed the intervention. Strong feasibility and acceptability (98 % adherence, 93 % compliance, and 90 % retention) were found. MDD remission was reached by 8/9 participants at week 16 and persisted through week 26. There were large decreases in clinician-rated and self-reported symptoms at each assessment (Hedges' g = 0.84-2.13). There were small-to-moderate increases in MCA velocity (g = 0.32-0.57) and conductance (g = 0.20-0.76) across time, with minimal changes in pulsatility (all g < 0.21). CONCLUSIONS: Preliminary results suggest RET for MDD treatment is feasible and plausibly efficacious, finding large antidepressant effects. A sufficiently powered randomized controlled trial to assess RET's efficacy for treating MDD via potential cerebrovascular mechanisms is warranted.


Subject(s)
Cerebrovascular Circulation , Depressive Disorder, Major , Feasibility Studies , Resistance Training , Humans , Depressive Disorder, Major/therapy , Depressive Disorder, Major/physiopathology , Male , Female , Adult , Resistance Training/methods , Middle Aged , Cerebrovascular Circulation/physiology , Middle Cerebral Artery/diagnostic imaging , Middle Cerebral Artery/physiopathology , Motivation , Treatment Outcome , Patient Compliance
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