Yoga for older adults: memory, attention and mental flexibility

Yoga studies report gains in working memory and mental flexibility, including an eight-week trial with three 60-minute classes each week.

日本語で読む（Japanese version）

Remembering what you came to buy while taking out your wallet means holding information in mind as you act. So does listening to a shop assistant and changing your plan. These small exchanges draw on the ability to retain information and move between tasks. When a name will not come to you, memory may feel like the whole story. Yoga research has also found changes in how older adults handle information while doing something else.[10]

In a randomized controlled trial involving 118 community-dwelling adults with an average age of 62.0, an eight-week Hatha yoga program improved working memory and the efficiency of mental switching compared with stretching and strengthening exercise. The comparison is particularly useful: the other group was exercising too, rather than simply waiting for a program to begin. Both groups had the same class frequency and duration.[10]

For adults over 60 and families considering an activity together, this offers a concrete reason to consider yoga. Studies in community settings and residential homes have reported changes in holding information, recalling it and shifting responses. The findings concern different mental abilities, measured by different tests. Looking at those abilities separately gives a clearer picture of what practice might offer than a broad promise of a sharper mind.[6][10][14]

Working memory helps you use what you remember

The eight-week Hatha yoga trial examined executive function: the mental work of keeping information available while carrying out a task, and changing your approach when the task changes. Working memory is the temporary holding and use of information. Task switching concerns moving from one set of demands to another. These are related to memory, but they ask more of a person than recalling a word after hearing it.[10]

Participants were randomly assigned to Hatha yoga or a stretching-strengthening control group. Both attended classes three times a week, for 60 minutes each time, over eight weeks. The researchers assessed task switching and working memory before and after the program. Giving the comparison group a matching exercise schedule makes the result relevant to someone choosing between activities, since the contrast includes two ways of taking part in regular movement.[10]

The yoga group responded faster in mixed and repeated task-switching conditions. Accuracy was higher in the single-task condition. Improvements also appeared in tasks requiring participants to check incoming information against earlier information, and to recall part of a changing sequence. The findings therefore included both speed and accuracy, rather than suggesting that participants merely answered more quickly at the expense of getting things right.[10]

The reported effects were relatively small. Partial eta squared, a statistical measure of the size of an effect in the analysis, was 0.04 for reaction time, 0.05 for single-task accuracy, 0.08 for the memory-updating task and 0.06 for partial recall. These values describe changes on particular tests. Several aspects of information handling improved, but the result was not a dramatic expansion of memory capacity.[10]

The tests were a task-switching paradigm, the n-back task and running memory span. In n-back, the person checks current information against something presented earlier. The accuracy advantage appeared in the 2-back condition, which refers to information two steps back. In running memory span, the advantage concerned partial recall scores. Each result belongs to a specified condition within a test, rather than a single overall score for all aspects of cognition.[10]

That detail matters when thinking about daily life. Holding the order of errands in mind or keeping track of information while discussing plans with family are everyday examples of using information, rather than merely storing it. They help explain the abilities being studied. The trial’s demonstrated benefits remain improvements on its tests; these familiar situations are ways to understand why the tested abilities are relevant.[10]

The active comparison is also a strength. A contrast with people doing nothing would include the wider experience of joining an activity. Here, participants in the other group also attended exercise classes, with the same frequency and length. The yoga group’s better results under those conditions provide a more specific basis for choosing yoga than a personal story about feeling more alert after a class.[10]

For a reader whose main concern is forgetting names, working memory can initially sound like a separate subject. Yet it broadens the question in a useful way. The trial asked whether people could retain information while responding, update what they held in mind and switch efficiently. Its findings suggest that the cognitive interest in yoga extends beyond the number of items someone can remember.[10]

Words, shapes and sequences reveal different changes

A randomized trial in residential homes examined verbal and visual memory alongside attention and the ability to hold information. Homes were randomly allocated in blocks. At the beginning, there were 62 participants in the yoga group and 58 in the waiting-list group, a total of 120. At six months, 87 had completed the study: 44 in yoga and 43 in the waiting-list group.[6]

The program changed over time. Yoga sessions were daily during the first month, weekly until the third month, and participants were then encouraged to continue without supervision until the sixth month. This was a progression from frequent instruction toward practice undertaken independently. It differs from a program that keeps the same number of supervised classes throughout, so its results should be read alongside that changing pattern of support.[6]

At the end of six months, the yoga group showed significantly greater improvements than the waiting-list group in immediate and delayed recall of words and visual material. Improvements also appeared in attention and spatial working memory, verbal fluency, executive function and processing speed. The comparisons accounted for the corresponding initial test score and education. The reported benefits therefore covered a range of tasks, rather than one memory test alone.[6]

Words and shapes give researchers different material to test. Recalling words that have been heard is a different task from remembering a figure that has been seen. Immediate recall and recall after a delay add another distinction. This trial reported improvements across both kinds of material and both timing conditions. Its findings extend beyond reproducing something directly after it has been presented.[6]

The assessments included Rey’s Auditory Verbal Learning Test and Rey’s complex figure test, alongside tests involving digit and spatial sequences. The researchers also tested producing words, responding to interference between colors and words, and following a sequence. These different demands help explain why an article about memory also needs to discuss attention, response speed and the way a person organizes an answer.[6]

Verbal fluency was assessed by asking participants to produce words orally. The Stroop color-word interference test contributed to the assessment of executive function, and Trail Making Test A to processing speed. The improvements reported in the study included these tasks as well as verbal and visual recall. The breadth of the report is a reason to look beyond remembering a list when considering cognitive outcomes.[6]

A separate randomized comparison involved 45 healthy residents of a retirement home, aged 65–80. They were divided into yoga, physical activity and no-activity groups, with 15 people in each. The yoga program consisted of two 45-minute sessions a week over 12 weeks, making 24 sessions. Attention, memory and reasoning were tested before and after the program.[14]

There were 26 men and 19 women, with an average age of 72.3. After the program, the yoga group improved from its own starting scores in all three areas. At the end, attention and reasoning also differed significantly between yoga and each of the other groups. Reasoning here can be understood as working out an answer from the information available, another part of cognition beyond remembering material.[14]

The yoga group’s before-and-after changes were reported as Hedges’ g values of 1.35 for attention, 1.04 for memory and 1.82 for reasoning. Each within-group change had p < 0.001. For attention and reasoning at the end, comparisons with physical activity had p < 0.001 and comparisons with no activity had p < 0.01. The corresponding between-group claim was not reported for memory.[14]

This distinction preserves what the study actually found. Its memory result described the yoga group’s improvement from its own starting point. Its attention and reasoning results also included comparisons with people undertaking other activities or no activity. Both are informative, but they answer different questions. With 15 participants per group, the study gives a specific picture of healthy residents in that setting.[14]

Reading the community and residential studies together widens the range of living situations represented. For adults traveling from home to classes, there is evidence about task switching and working memory. For residents participating in activities where they live, there are findings on words, shapes, attention and reasoning. The shared interest is cognition, while the program, comparison and tests remain specific to each study.[6][10][14]

The wider evidence separates memory from attention

A meta-analysis of mind-body exercise, including healthy older adults, found small benefits for verbal memory and working memory, but did not confirm an improvement in attention. This wider finding sits alongside the positive attention result in the small residential trial. The feature’s separate article on mild cognitive impairment explores that combined evidence in more detail, including why different cognitive domains need separate consideration.[3][14]

The broader result is useful because a single successful test can otherwise become a claim about all mental abilities. Remembering verbal material, holding information for use and maintaining attention have different demands. Evidence of a benefit in one area gives a reason to be interested in that area. It also makes the absence of a confirmed benefit elsewhere part of the picture, rather than an inconvenient detail.[3]

A cross-sectional study of long-term Hatha yoga practice showed a similarly uneven pattern. It compared 30 healthy older men: 15 who had practiced for at least two years and 15 who had not. The groups were similar in age, years of education and level of physical activity. Executive function and reaction time showed promising results. Episodic memory and sustained attention showed no significant differences between groups, although a trend toward improvement favored the yoga practitioners on those measures.[15]

Episodic memory concerns remembering events; sustained attention concerns keeping attention going. These are distinct from changing tasks efficiently or producing a quick response. The study’s mixed findings illustrate the problem with saying simply that yoga makes someone mentally sharper. More precise terms keep the promising findings visible while retaining the outcomes for which the groups did not differ significantly.[15]

The researchers used the French adaptation of the Victoria Stroop test, Zazzo’s Cancellation Task, the Five Word Test and a set of computerized reaction-time tests. Together these assessed selective attention, sustained attention, episodic memory and processing speed. That range of tests allowed the researchers to examine several aspects of cognition in established practitioners, instead of judging long-term practice from a single measure.[15]

The comparison participants had no experience of yoga, meditation or other mind-body interventions. Matching physical activity levels meant the comparison was between men with similar overall activity, rather than simply between active and inactive people. The authors called for further study of physiological and psychological variables to clarify the relationship between yoga and cognitive performance.[15]

These participants were already practitioners or nonpractitioners when they were assessed. The study offers a comparison at that point in their lives, rather than following randomly assigned beginners through a program. Executive function and reaction time favored practitioners; episodic memory and sustained attention showed a favorable trend without significant between-group differences.[15]

Trials involving people with mild cognitive impairment, or MCI, and research using brain imaging are discussed in the separate article on that condition. Keeping those studies distinct helps readers understand which participants the findings concern. This article’s main focus is the broader question of memory, attention and switching between tasks in later life, across community and residential settings.[5][9]

Forgotten words are not the only measure of what yoga might offer.

Numbers: memory and mental switching

• 118 people, average age 62.0: the community trial comparing Hatha yoga with stretching and strengthening.[10]
• Three classes a week, 60 minutes each, for eight weeks: the schedule followed by both groups in that trial.[10]
• 87 people over six months: the residential trial’s completers, comprising 44 yoga participants and 43 waiting-list participants.[6]
• Two sessions a week, 45 minutes each, for 12 weeks: the program tested in healthy retirement-home residents.[14]