Neuromodulation for Exercise Adherence

Neuromodulation for Exercise Adherence in Older Veterans

Lack of adherence to an exercise program is a major problem for older Veterans. Several fall prevention programs fail in the home setting due to lack of adherence. Exercise adherence is dependent on brain function among other factors. Magnetic stimulation of the front part of the brain improves brain function necessary for planning and following-through. The investigators propose a three-phase study in 106 sedentary older Veterans. Everyone will be trained on use of the exergame, Nintendo Wii-Fit, that the investigators' team has found beneficial in improving balance and gait. They will be asked to exercise using Wii-Fit at home for 45 minutes daily five days/week for 12-weeks. Those that exercise less than recommended dose and those that exercise adequately but have low executive function will receive either real or sham magnetic stimulation to the front part of their brain over ten sessions paired with exercise training. All subjects will further complete 24-weeks of Wii-Fit home exercises. Adherence, executive function, balance and gait, self-efficacy, delay discounting, and falls will be measured periodically.

Study Overview

• Status: Recruiting
• Conditions: Executive Dysfunction; Poor Exercise Adherence
• Intervention / Treatment: Device: rTMS; Device: Sham; Other: No intervention

Detailed Description

Background: Fall-related hospitalizations and consequent morbidity and mortality continue to rise despite the availability for over two decades of evidence-based fall-prevention programs. This is a major problem since more than 2.5 million older adults are treated annually for fall-related injuries in the US. Fall-prevention programs focusing on strength and balance exercises have been successful in facility settings but exercise programs are ineffective at home due to lack of adherence. Estimates indicate that only 1 in 5 individuals adhere to home exercise programs for fall prevention. Thus, there is an urgent need to improve adherence to exercise performed at home by older adults seeking to improve balance for the sake of fall prevention. Behavioral interventions have failed to consistently improve adherence to exercise. Biological reasons for poor exercise adherence, such as executive dysfunction, have not been explored. Adherence to long-term exercise is dependent on executive function (EF), which is controlled by the [dorsolateral prefrontal cortex (DLPFC)] of the brain. EF influences choices in scheduling, forgoing competing activities, enduring subtle costs of time and inconvenience, and the ability to delay gratification. Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive neuromodulation increasingly used for neural network specific interventions. rTMS of the DLPFC improves EF, memory, motivation, and mental flexibility. rTMS studies to date have stimulated the motor cortex for gait and balance improvements. The role of DLPFC in exercise adherence has not been explored. The proposed study will be the first to test DLPFC stimulation for improving exercise adherence.

Objective: The study objective is to determine the effects of rTMS treatment of the dorsolateral prefrontal cortex compared to sham on: [1. Short-term (2-wk) changes in executive function;] 2. Long-term (24-wk) adherence to a home-based exercise program; 3. Long-term (24-wk) changes in balance and gait; and [4. Short-term (2-wk) changes in self-efficacy and delay discounting.]

Methods: Sedentary community-dwelling older Veterans (age 65 years, [N=106]) will participate in a double-blind randomized sham-controlled three-phase study. The proposed study will use Nintendo Wii-Fit exercises. Phase I will include two weeks of facility-based exercise for safety assessment and learning the program, followed by 12 weeks of home-based exercises. [Subjects with poor adherence and those with good adherence with low EF] will then be randomized to rTMS or sham treatments. Phase II will include ten consecutive weekdays of rTMS or sham treatment along with exercise training for subjects with poor adherence [and for those with good adherence and low EF] and continuation of home-based exercises for those with good adherence and EF. Phase III includes 24-weeks of a home-based exercise program. All subjects will exercise for 45 minutes five days/week. [Objective measure of adherence collected from Wii-Fit console and Conner's continuous performance test for EF will be the primary outcome measures.] Balance and gait will be assessed. [Self-efficacy, delay discounting along with fear of falls, and falls incidence will be assessed. Outcome measures will be assessed at baseline, and at 14, 16, and 40 weeks.]

Significance: This project will have a major impact in improving adherence to an exercise program and in turn, improve balance in sedentary community-dwelling older Veterans. At the end of the proposed project, the investigators will gain knowledge about the efficacy of rTMS in improving EF and exercise adherence. Knowledge gained about the adherence to home-based exercises would be applicable to multiple conditions such as diabetes. Since Wii-Fit and rTMS are readily available, translation of the study results to clinical practice would be expeditious.

• Study Type: Interventional
• Enrollment (Estimated): 106
• Phase: Phase 4

Contacts and Locations

• Study Contact: Name: Kalpana P Padala, MD MS; Phone Number: (501) 257-2044; Email: kalpana.padala@va.gov

Study Locations

• United States
  • Arkansas
    • North Little Rock, Arkansas, United States, 72114-1706
      • Recruiting
      • Central Arkansas Veterans Healthcare System Eugene J. Towbin Healthcare Center, Little Rock, AR
      • Contact: Kalpana P Padala, MD MS; Phone Number: 501-257-2044; Email: kalpana.padala@va.gov
      • Principal Investigator: Kalpana P Padala, MD MS

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 60 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Sedentary Community Dwelling Veterans age 60 years
• Have TV at home

• Subjects reporting spending long periods of time in sedentary behavior by answering affirmatively to the question: 'For most days, do you feel you sit for too long (6-8 hours or more a day)?

  • Some examples might include when watching TV, working at the computer / laptop or when doing sitting-based hobbies such as reading and sewing' will be included

Exclusion Criteria:

GENERAL EXCLUSION CRITERIA

• Those that participate in regular physical activity for at least 30 minutes five or more days of the week

EXCLUSIONARY DUE TO Wii-Fit Exercises

• Use of wheel chair for mobility
• Cognitive impairment [Montreal Cognitive Assessment (MoCA < 26)]
• Weight 325 lbs. (weight restriction of the Wii-Board)
• Absolute contraindications to exercise per The American College of Sports Medicine guidelines
• Those with medical conditions that in the opinion of the study physician are likely to compromise safe participation

EXCLUSIONARY DUE TO rTMS

• Taking medications known to increase risk of seizures from 2012 Beers criteria such as bupropion, chlorpromazine, clozapine.
• Taking other medications known to increase risk of seizures such as tricyclic antidepressants.
• Taking ototoxic medications: Aminoglycosides, CisplatinHistory of seizures/ seizures in first degree relatives
• Those with implanted device
• History of stroke, aneurysm, or cranial neurosurgery
• History of bipolar disorder
• History of abnormal electroencephalogram (EEG)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Sham Comparator: Sham; This group will be randomized to receive sham treatment	Device: Sham; This group will receive sham treatment
Active Comparator: rTMS; This group will be randomized to receive rTMS	Device: rTMS; This group will receive rTMS treatment
Other: No intervention; This group will receive no intervention	Other: No intervention; This group will receive no intervention

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in Adherence as measured by number of minutes	Total number of minutes exercised	14 weeks, 40 weeks
Change in Conner's Continuous Performance Test	Commission Error percentage Range 0-100% Higher score is improvement	14 weeks, 16 weeks, 40 weeks
Change in Adherence as measured by number of sessions	Total number of sessions exercised	14 weeks, 40 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in Gait speed	The test measures habitual walking speed in meters/sec	14 weeks, 16 weeks, 40 weeks
Change in Timed Up and Go	This is a widely accepted test of pro-active balance and mobility and measured in secs	14 weeks, 16 weeks, 40 weeks

Collaborators and Investigators

• Sponsor: VA Office of Research and Development
• Investigators: Principal Investigator: Kalpana P Padala, MD MS, Central Arkansas Veterans Healthcare System Eugene J. Towbin Healthcare Center, Little Rock, AR

Study record dates

Study Major Dates

• Study Start (Actual): April 1, 2019
• Primary Completion (Estimated): January 31, 2025
• Study Completion (Estimated): January 31, 2025

Study Registration Dates

• First Submitted: November 5, 2018
• First Submitted That Met QC Criteria: November 5, 2018
• First Posted (Actual): November 7, 2018

Study Record Updates

• Last Update Posted (Actual): February 23, 2024
• Last Update Submitted That Met QC Criteria: February 22, 2024
• Last Verified: February 1, 2024

More Information

Terms related to this study

• Keywords: exercise adherence; Older veterans; home based exercise
• Other Study ID Numbers: E2961-R

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes
• product manufactured in and exported from the U.S.: Yes