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Just four minutes of daily strength training may significantly improve strength, balance and mobility in older adults, according to a study led by researchers at Penn State College of Medicine.
Published in the journal PLOS One, the study found that adults aged 65 and older experienced meaningful improvements in physical performance after 12 weeks of a brief daily exercise routine.
The findings suggest that older adults may be able to maintain physical independence with much less exercise than many people assume.
Muscle strength, balance and mobility are important for reducing the risk of falls and maintaining the ability to live independently. As people age, everyday activities such as standing up from a chair, climbing stairs and walking can become increasingly difficult.
Christopher Sciamanna, professor of medicine and public health at Penn State College of Medicine and lead author of the study, said even a short exercise routine could improve important aspects of physical function.
“The human body is designed to improve very quickly,” Sciamanna said. “And just a few repetitions of an exercise performed regularly can lead to huge improvements.”
He added that exercise should focus on maintaining the physical abilities people want to preserve as they age.
Why shorter workouts matter
Strength training, also known as resistance training, involves making muscles work against resistance, such as body weight or elastic bands. Research has shown that it can improve muscle strength within a few months.
However, fewer than one in five older adults meet the recommendation to perform muscle-strengthening activities at least twice a week, according to the study.
Time constraints, physical discomfort and the demands of conventional exercise programmes can discourage older people from exercising regularly.
Smita Dandekar, an associate professor of pediatrics at Penn State College of Medicine and a co-author of the study, said the complexity of planning a workout could also discourage participation.
“Exercise is actually really complicated, because you have to decide how many repetitions, how far, how many sets, how much rest, and how many times per week,” Dandekar said. Making exercise sessions shorter could help address some of these barriers, she added.
The researchers had previously conducted a smaller experiment called FAST-1, in which 24 older adults performed just 30 seconds of push-ups and squats daily. After six months, participants improved their ability to perform squats.
Encouraged by those findings, the researchers launched a second study to examine whether a brief but more varied routine could improve physical performance.
Four exercises in four minutes
The new trial, called FAST-2, involved 97 participants with an average age of 74. They were randomly assigned to two groups, one following the exercise programme and the other receiving no intervention.
Before the trial, participants reported exercising for an average of only about 18 minutes a week, well below general recommendations for physical activity.
The FAST-2 programme consisted of four exercises:
- Push-ups: To strengthen the upper body.
- Chair stands: To strengthen the legs by repeatedly rising from a seated position.
- Two-arm rows: To work the upper-body muscles against resistance.
- Stair stepping: To strengthen the legs and support functional mobility.
Each exercise lasted 30 seconds, followed by 30 seconds of rest, making the total routine four minutes.
Participants received four elastic resistance bands, an adjustable stepper and written instructions explaining how to perform the movements. Easier exercise variations were also provided to accommodate different physical abilities.
The findings highlight the potential of short, manageable exercise routines to help older adults maintain strength and mobility. However, the four-minute programme should not be considered a complete replacement for broader physical activity recommendations, which also include aerobic exercise and other activities that support overall health.
For older adults who find conventional workouts difficult to maintain, a brief daily routine could offer a practical starting point for building strength and preserving independence.