Impact of Brief Daily Functional Resistance Training on Lower Extremity Physical Performance
Principal Investigator:
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Christopher Sciamanna
Co-Investigators:
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David Conroy
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Liza Rovniak
R01 AG079938
One of the most common, and untreated, health problems among older adults is mobility disability, observed in nearly one in five (17.9%) of older adults. Mobility disability is typically the first disability to develop and increases future risk for additional disabilities and death. Though the most effective treatments for mobility disability are forms of exercise, especially resistance training (RT), they are rarely used, with fewer than 20% of older adults meeting RT guidelines and even fewer among those with mobility disability. The core problem of disseminating the benefits of RT to older adults is adherence. One potential opportunity to enhance adherence to RT, which has not been tested, is to make RT programs shorter. Studies show that most of the benefits of RT accrue with the first few sets per week, consistent with the law of diminishing utility. While traditional RT programs for older adults, like those offered by Silver Sneakers, are typically 45 minutes three times weekly, fewer than 5% of older adults with free access to these programs participate. Our qualitative work shows that older adults often feel that 45 minute sessions are too challenging (e.g., “I don’t think I have the strength to do it for 45 minutes”) and 75% of older adults we surveyed preferred a 5 minute RT to a 45 minute RT option, assuming they were equally effective. In 2020, we set out to design a brief, home-based RT program that would lead to both high levels of adherence and functional improvement. We called the program FAST (Functional Activity Strength Training) and, to overcome its brevity, FAST was augmented with several standard behavior change techniques (e.g., feedback, reminders, self-monitoring) and a novel form of goal- setting, rarely used in RT studies, for the number of additional repetitions participants should be able to do during the study. In FAST-1, 24 healthy older adults were prescribed 30 seconds of squats and push-ups each day and given no personal supervision. Over 6 months, they performed the exercises on 73% of days and showed large increases in squat and push-up performance (Cohen’s d > 1.0). In FAST-2, we randomly assigned 97 older adults with mobility disability, and those assigned to 30 seconds each of chair stands and steps onto a stepper each day completed exercises on 81% of days (5.7 days per week) and improved their 5 time sit-to-stand test (-2.8 seconds, Cohen’s d=0.53), 30 second chair stand test (+4.2 repetitions, d=1.1) and One Leg Stand test (+3.7 seconds, d=0.40), versus controls. In this multicenter study, we will randomly assign 360 older adults with an SPPB score < 8 to 6 months of daily FAST or to a delayed control group. We will test the impact of FAST on physical performance, walking ability, falls and functional limitations. We hypothesize that FAST will improve these measures more than controls, and that those with greater adherence and perceived effort will improve the most. By rigorously testing FAST, we hope to change the paradigm of RT prescription from “More is better” to “What will people do that works?” and, if FAST proves superior, a future study will test whether FAST leads more older adults to do RT and, thereby, improve the public’s health.
Comparative Effectiveness of Brief Strength and Balance Exercises and Standard Home-Based Group Exercise for Primary Care Patients with Mobility Disability
Principal Investigator:
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Christopher Sciamanna
Co-Investigators:
PCORI contract
PCORI listing
One in four older adults, the fastest growing demographic group in the US, reports serious difficulty walking or climbing stairs. Older adults note that these walking difficulties “deprives you of your identity” and “affects my day to day life… I can’t do very much work on my own.” Walking difficulties impair people’s quality of life more than depression, anxiety, or pain. Walking difficulties also increase the chances of future disability, death, and healthcare costs. Though strength training improves walking ability, fewer than one in five older adults do strength training enough to benefit. What is unknown is how to create a strength training program that improves the ability of older adults to walk and do other things they need and want to do and that older adults are willing to do.
One approach to designing a strength training program that has not been tried before is to make them shorter. In 2020, the project team set out to design a short strength training program that older adults could do at home that would improve their physical function and that they would consistently do. The program was called FAST (Functional Activity Strength Training) and, to make it more effective, the team set specific goals for how many additional repetitions each person should be able to do over 12 weeks. These goals were then mentioned repeatedly, and feedback was provided about how well people made progress toward these goals.
In the first study of FAST (FAST-1), 24 healthy older adults performed 30 seconds of squats and push-ups each day but received no personal supervision. Over six months, they performed the exercises on 73 percent of days, which led to large increases in the number of push-ups and squats they were able to do. In the second study of FAST (FAST-2), the team randomly assigned 97 older adults who had trouble walking, and those assigned to do 30 seconds each of chair stands and steps onto a stepper each day improved their ability to stand up from a chair and stand on one leg more than those who did not do the exercises.
In this project, the team plans to test the impact of FAST, its brief home-based strength training program which includes performance goal setting, to a program for home (BAND TOGETHER) that is similar to one offered by Silver Sneakers, available online to millions of older adults, and includes strength, balance, and aerobic exercises. The team hypothesizes that the brief program (FAST) will improve leg function better than the standard program (BAND TOGETHER), by encouraging older adults to be more consistent with using it and to try harder when they do.
This study will enroll 520 primary care patients who are at least 65 years of age and randomly assign them to have access to 12 months of daily FAST or three‐times weekly BAND TOGETHER. Each program will be delivered via the internet and each patient will receive about 30 minutes per month of personal support. The study will enroll patients who have trouble walking, have access to the internet, can provide informed consent, and receive permission from their doctor. The study is designed to see whether patients who have access to FAST, after 12 months, have better walking ability, balance, and leg strength and can do their normal daily activities more easily and fall less often than patients who have access to BAND TOGETHER.
To help us understand how best to perform the study, as well as how best to share the results, the study team assembled a group of stakeholders that includes patients, primary care providers, fitness center directors, and people who work for insurance, public health, and senior services organizations. The team will bring those stakeholders together each year and consult them regularly to help make difficult decisions as they arise--decisions that may impact each group of stakeholders differently. Two patient partners will work with investigators to supervise the group of stakeholders and organize their feedback, structured as a public comment period, to help the research team make decisions that take into account the perspectives of all of the key groups of stakeholders involved in improving the physical function of older adults.
