Laura Karavirta
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View article: Use it or lose it: a four-year follow-up assessing whether physical activity near one’s capacity reduces the risk of functional decline among older adults
Use it or lose it: a four-year follow-up assessing whether physical activity near one’s capacity reduces the risk of functional decline among older adults Open
Background Physical capacity (PC) defines the limits for physical activity (PA), while activities in daily life typically remain submaximal. Older adults whose daily activities approach their physical capacity may experience less functiona…
View article: The Prospective Physical Activity, Sitting, and Sleep consortium (ProPASS): addressing methodological and geographical barriers to inform global public health guidelines, interventions, and precision medicine (Preprint)
The Prospective Physical Activity, Sitting, and Sleep consortium (ProPASS): addressing methodological and geographical barriers to inform global public health guidelines, interventions, and precision medicine (Preprint) Open
UNSTRUCTURED For decades, global guidance for sedentary behaviour and sleep has primarily been informed by studies that relied on self-report questionnaires to assess behaviours. However, it is widely recognised that self-reported data su…
View article: Differences in prolonged walking intensity and duration between older people reporting difficulty, modifications or no difficulty in walking
Differences in prolonged walking intensity and duration between older people reporting difficulty, modifications or no difficulty in walking Open
Older people report modifying their walking by slowing down speed or using walking aids to accommodate increased exertion and the decline in physical capacity. Self-reported walking modifications and difficulties are associated with daily …
View article: Laser-Assisted Drug Delivery for Hypertrophic Scar Treatment: A Scoping Review
Laser-Assisted Drug Delivery for Hypertrophic Scar Treatment: A Scoping Review Open
Fractional ablative laser (FAL) is a minimally invasive method of hypertrophic scar management first introduced in 2004. Laser technologies and techniques have continued to evolve since that time and have included the addition of laser-ass…
View article: Determinants of mobility in community-dwelling older adults: a network analysis before, during, and two years after the onset of the COVID-19 pandemic
Determinants of mobility in community-dwelling older adults: a network analysis before, during, and two years after the onset of the COVID-19 pandemic Open
Background We conceptualized out-of-home mobility as life space mobility and autonomy outdoors. Both are correlated with quality of life and influenced by multiple underlying factors. We used a complex systems approach and network models t…
View article: Body composition and functional capacity as determinants of physical activity in middle-aged and older adults: a cross-sectional analysis
Body composition and functional capacity as determinants of physical activity in middle-aged and older adults: a cross-sectional analysis Open
Background Body composition and functional capacity are both related to physical activity, but the interplay is complex, as different body tissue types contribute differently on physical activity and functional capacity. To clarify the rol…
View article: Physical determinants of daily physical activity in older men and women
Physical determinants of daily physical activity in older men and women Open
Introduction The ability to perform bodily movement varies in ageing men and women. We investigated whether physical fitness may explain sex differences in daily physical activity energy expenditure (PAEE) among older people. Methods In th…
View article: 24-hour movement behaviors and changes in quality of life over time among community-dwelling older adults: a compositional data analysis
24-hour movement behaviors and changes in quality of life over time among community-dwelling older adults: a compositional data analysis Open
Background Favorable movement behavior patterns, comprising more physical activity, less sedentary behavior, and sufficient sleep, may promote the maintenance of good quality of life (QoL) with advancing age. The aim of the present study w…
View article: Use it or lose it: A four-year follow-up to assess whether engagement with physical activity close to one's physical capacity may protect against decline in physical functioning among older adults
Use it or lose it: A four-year follow-up to assess whether engagement with physical activity close to one's physical capacity may protect against decline in physical functioning among older adults Open
PURPOSE: Physical activity (PA) is distinct from physical capacity (PC), even though they are correlated in old age. PC defines the limits for PA, while activities in daily life typically remain submaximal. Individuals whose intensity of d…
View article: Reciprocal Associations Between Relative or Absolute Physical Activity, Walking Performance, and Autonomy in Outdoor Mobility Among Older Adults: A 4-Year Follow-Up
Reciprocal Associations Between Relative or Absolute Physical Activity, Walking Performance, and Autonomy in Outdoor Mobility Among Older Adults: A 4-Year Follow-Up Open
Objectives: To examine the reciprocal associations between walking performance, physical activity (PA), and perceived autonomy in outdoor mobility in 322 older adults. Methods: At baseline and four years later, a 6-min walk test assessed w…
View article: 184 Use it or lose it: can engagement in physical activity close to one’s relative physical capacity protect against decline in physical functioning among older adults?
184 Use it or lose it: can engagement in physical activity close to one’s relative physical capacity protect against decline in physical functioning among older adults? Open
Purpose Physical activity (PA) is distinct from physical capacity (PC), even though they correlate strongly in old age. Physical capacity defines the boundaries for PA, while activities in daily life typically remain submaximal. Older peop…
View article: The role of cardiorespiratory fitness and body composition in the association between physical activity and menopausal symptoms
The role of cardiorespiratory fitness and body composition in the association between physical activity and menopausal symptoms Open
Objective The aim of the study was to conduct exploratory analyses on the role of cardiorespiratory fitness (CRF) and body composition in the association between physical activity and menopausal symptoms. Methods This was a cross-sectional…
View article: Free-Living Sit-to-Stand Characteristics as Predictors of Lower Extremity Functional Decline among Older Adults
Free-Living Sit-to-Stand Characteristics as Predictors of Lower Extremity Functional Decline among Older Adults Open
Purpose Habitual strength and power-demanding activities of daily life may support the maintenance of adequate lower extremity functioning with aging, but this has been sparingly explored. Hence, we examined whether the characteristics of …
View article: Physical determinants of daily physical activity in older men and women
Physical determinants of daily physical activity in older men and women Open
Introduction The ability to perform bodily movement varies in ageing men and women. We investigated whether physical fitness may explain sex differences in daily physical activity energy expenditure (PAEE) among older people. Methods A pop…
View article: Longitudinal changes in life-space mobility and autonomy in participation outdoors among Finnish community-dwelling older adults from pre-COVID-19 to through the pandemic
Longitudinal changes in life-space mobility and autonomy in participation outdoors among Finnish community-dwelling older adults from pre-COVID-19 to through the pandemic Open
Background Among older people, community mobility was reduced at the beginning of the COVID-19 pandemic, but the longer-term changes are unclear. Aims To study lower extremity performance and car driving as predictors of changes in older a…
View article: Laboratory-assessed gait cycle entropy for classifying walking limitations among community-dwelling older adults
Laboratory-assessed gait cycle entropy for classifying walking limitations among community-dwelling older adults Open
View article: Physical Behavior Profiles Among Older Adults and Their Associations With Physical Capacity and Life-Space Mobility
Physical Behavior Profiles Among Older Adults and Their Associations With Physical Capacity and Life-Space Mobility Open
We identified data-driven multidimensional physical activity (PA) profiles using several novel accelerometer-derived metrics. Participants aged 75, 80, and 85 ( n = 441) wore triaxial accelerometers for 3–7 days. PA profiles were formed wi…
View article: Physical Activity Changes From Before to During the First Wave of the COVID-19 Pandemic Among Community-Dwelling Older Adults in Finland
Physical Activity Changes From Before to During the First Wave of the COVID-19 Pandemic Among Community-Dwelling Older Adults in Finland Open
This study aimed to compare community-dwelling older adults’ physical activity (PA) during the COVID-19 restrictions in 2020 to their PA levels 2 years before and investigate associations between earlier physical performance and PA levels …
View article: Autonomic nervous system and postural control regulation during orthostatic test as putative markers of physical resilience among community-dwelling older adults
Autonomic nervous system and postural control regulation during orthostatic test as putative markers of physical resilience among community-dwelling older adults Open
View article: Comparing the associations between muscle strength, walking speed, and mortality in community-dwelling older adults of two birth cohorts born 28 years apart
Comparing the associations between muscle strength, walking speed, and mortality in community-dwelling older adults of two birth cohorts born 28 years apart Open
View article: O.4.1-8 Association of sit-to-stand capacity and free-living performance using thigh-worn accelerometers among 60-90-year-old adults
O.4.1-8 Association of sit-to-stand capacity and free-living performance using thigh-worn accelerometers among 60-90-year-old adults Open
Introduction Five times sit-to-stand (STS) test is commonly used as a clinical assessment of lower-extremity functional ability, but its association with free-living performance has not been studied. Therefore, we investigated the associat…
View article: O.4.1-6 Multidimensional physical activity profiles and changes in physical function and self-reported walking ability among community-dwelling older adults – a 4-year follow-up
O.4.1-6 Multidimensional physical activity profiles and changes in physical function and self-reported walking ability among community-dwelling older adults – a 4-year follow-up Open
Purpose Physical activity (PA) is multidimensional but often assessed using single metrics. We studied how data-driven PA profiles predict changes in physical functioning and self-reported walking ability over time among older adults. Meth…
View article: O.1.2-9 Sex-related differences in free-living estimates of physical activity energy expenditure between older men and women
O.1.2-9 Sex-related differences in free-living estimates of physical activity energy expenditure between older men and women Open
Purpose Physical activity is often quantified as physical activity energy expenditure (PAEE), which may be affected by individual ability to sustain physical activity intensity. We examined if there is a true difference in physical activit…
View article: Association of Sit-to-Stand Capacity and Free-Living Performance Using Thigh-Worn Accelerometers among 60- to 90-Yr-Old Adults
Association of Sit-to-Stand Capacity and Free-Living Performance Using Thigh-Worn Accelerometers among 60- to 90-Yr-Old Adults Open
Purpose Five times sit-to-stand (STS) test is commonly used as a clinical assessment of lower-extremity functional ability, but its association with free-living performance has not been studied. Therefore, we investigated the association b…
View article: Association between arterial stiffness and walking capacity in older adults
Association between arterial stiffness and walking capacity in older adults Open
View article: Association Between Free-Living Sit-to-Stand Transition Characteristics, and Lower-Extremity Performance, Fear of Falling, and Stair Negotiation Difficulties Among Community-Dwelling 75 to 85-Year-Old Adults
Association Between Free-Living Sit-to-Stand Transition Characteristics, and Lower-Extremity Performance, Fear of Falling, and Stair Negotiation Difficulties Among Community-Dwelling 75 to 85-Year-Old Adults Open
Background Good sit-to-stand (STS) performance is an important factor in maintaining functional independence. This study investigated whether free-living STS transition volume and intensity, assessed by a thigh-worn accelerometer, is assoc…
View article: Is Complexity of Daily Activity Associated with Physical Function and Life-Space Mobility among Older Adults?
Is Complexity of Daily Activity Associated with Physical Function and Life-Space Mobility among Older Adults? Open
Purpose Information about mobility and physical function may be encoded in the complexity of daily activity pattern. Therefore, daily activity pattern complexity metrics could provide novel insight into the relationship between daily activ…
View article: Physical Activity Scaled to Preferred Walking Speed as a Predictor of Walking Difficulty in Older Adults: A 2-Year Follow-up
Physical Activity Scaled to Preferred Walking Speed as a Predictor of Walking Difficulty in Older Adults: A 2-Year Follow-up Open
Background The usual accelerometry-based measures of physical activity (PA) are dependent on physical performance. We investigated the associations between PA relative to walking performance and the prevalence and incidence of early and ad…
View article: Day-to-Day Variability and Year-to-Year Reproducibility of Accelerometer-Measured Free-Living Sit-to-Stand Transitions Volume and Intensity among Community-Dwelling Older Adults
Day-to-Day Variability and Year-to-Year Reproducibility of Accelerometer-Measured Free-Living Sit-to-Stand Transitions Volume and Intensity among Community-Dwelling Older Adults Open
(1) Background: The purpose of this study was to evaluate the day-to-day variability and year-to-year reproducibility of an accelerometer-based algorithm for sit-to-stand (STS) transitions in a free-living environment among community-dwell…
View article: Use of walking modifications, perceived walking difficulty and changes in outdoor mobility among community-dwelling older people during COVID-19 restrictions
Use of walking modifications, perceived walking difficulty and changes in outdoor mobility among community-dwelling older people during COVID-19 restrictions Open
Background Outdoor mobility enables participation in essential out-of-home activities in old age. Aim To compare changes in different aspects of outdoor mobility during COVID-19 restrictions versus two years before according to self-report…