• A 15-year follow-up study of hip bone mineral density and associations with leisure time physical activity. The Tromsø Study 2001-2016 

      Mikkilä, Saija; Johansson, Jonas; Nordström, Anna Hava; Nordström, Peter; Emaus, Nina; Handegård, Bjørn Helge; Morseth, Bente; Welde, Boye (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-26)
      Aims<p> The aim was to investigate the long-term association between leisure time physical activity and hip areal bone mineral density (aBMD), in addition to change in hip aBMD over time, in 32–86 years old women and men.<p> <p>Methods <p>Data were retrieved from the 2001, 2007–2008, and 2015–2016 surveys of the Tromsø Study, a longitudinal population study in Norway. Leisure time physical ...
    • A 15-year follow-up study of hip bone mineral density and associations with leisure time physical activity. The Tromsø Study 2001-2016 

      Mikkilä, Saija; Johansson, Jonas; Nordström, Anna Hava; Nordström, Peter; Emaus, Nina; Handegård, Bjørn Helge; Morseth, Bente; Welde, Boye (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-26)
      Aims<p> <p>The aim was to investigate the long-term association between leisure time physical activity and hip areal bone mineral density (aBMD), in addition to change in hip aBMD over time, in 32–86 years old women and men.<p> <p>Methods <p>Data were retrieved from the 2001, 2007–2008, and 2015–2016 surveys of the Tromsø Study, a longitudinal population study in Norway. Leisure time physical activity ...
    • Adiposity Without Obesity: Associations with Osteoporosis, Sarcopenia, and Falls in the Healthy Ageing Initiative Cohort Study 

      Scott, David; Johansson, Jonas; Ebeling, Peter R.; Nordström, Peter; Nordström, Anna Hava (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-23)
      Objective - Obesity is commonly defined by BMI rather than adiposity, which may have differential effects on musculoskeletal health. Musculoskeletal outcomes were compared in older adults with normal adiposity and normal BMI (NA‐NBMI), those with high adiposity but normal BMI (HA‐NBMI), and those with high adiposity and high BMI (HA‐HBMI).<p> <p>Methods - In 3,411 70‐year‐olds, obesity was defined ...
    • Anthropometric measures are satisfactory substitutes for the DXA‐derived visceral adipose tissue in the association with cardiometabolic risk—The Tromsø Study 2015–2016 

      Lundblad, Marie Wasmuth; Jacobsen, Bjarne Koster; Johansson, Jonas; Grimsgaard, Sameline; Andersen, Lene Frost; Hopstock, Laila Arnesdatter (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-03)
      Background - Body mass index (BMI) increases while cardiometabolic risk factors decrease in individuals in high-income countries. This paradoxical observation raises the question of whether current measures of overweight and obesity properly identify cardiometabolic risk.<p> <p>Methods - A total of 3675 participants (59% women) aged 40–84 years with whole-body dual-energy x-ray absorptiometry ...
    • Associations of accelerometer-determined physical activity and sedentary behavior with sarcopenia and incident falls over 12 months in community-dwelling Swedish older adults 

      Scott, David; Johansson, Jonas; Gandham, Anoohya; Ebeling, Peter R; Nordström, Peter; Nordström, Anna Hava (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-05)
      <i>Objective</i>: To determine associations of accelerometer-determined time and bouts of sedentary behavior, light physical activity (PA) and moderate-to-vigorous PA (MVPA) with sarcopenia and incident falls over 12 months. <p> <p><i>Methods</i>:A total of 3334 Swedish 70-year-olds were assessed for sarcopenia, as defined by the revised definition of the European Working Group on Sarcopenia in ...
    • Associations of Sarcopenia and Its Components with Bone Structure and Incident Falls in Swedish Older Adults 

      Scott, David; Johansson, Jonas; McMillan, Lachlan; Ebeling, Peter R; Nordström, Peter; Nordström, Anna Hava (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-21)
      The aim of this study was to compare bone structure parameters and likelihood of falls across European Working Group on Sarcopenia in Older People (EWGSOP2) sarcopenia categories. 3334 Swedish 70-year olds had appendicular lean mass (normalized to height; ALMHt), lumbar spine and total hip areal BMD (aBMD) estimated by dual-energy X-ray absorptiometry. Volumetric BMD (vBMD) and structure at the ...
    • Between-study differences in grip strength: a comparison of Norwegian and Russian adults aged 40-69 years 

      Cooper, Rachel; Shkolnikov, Vladimir M.; Kudryavtsev, Alexander; Malyutina, Sofia; Ryabikov, Andrew; Hopstock, Laila Arnesdatter; Johansson, Jonas; Cook, Sarah Anne; Leon, David; Strand, Bjørn Heine (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-03)
      Background - Identifying individuals with low grip strength is an initial step in many operational definitions of sarcopenia. As evidence indicates that contemporaneous Russian populations may have lower mean levels of grip strength than other populations in northern Europe, we aimed to: compare grip strength in Russian and Norwegian populations by age and sex; investigate whether height, body mass ...
    • Collecting health-related research data using consumer-based wireless smart scales 

      Johannessen, Erlend; Johansson, Jonas; Hartvigsen, Gunnar; Horsch, Alexander; Årsand, Eirik; Henriksen, André (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-14)
      Background: Serious public-health concerns such as overweight and obesity are in many cases caused by excess intake of food combined with decreases in physical activity. Smart scales with wireless data transfer can, together with smart watches and trackers, observe changes in the population’s health. They can present us with a picture of our metabolism, body health, and disease risks. Combining ...
    • Complex lifestyle intervention among inactive older adults with elevated cardiovascular disease risk and obesity: a mixed-method, single-arm feasibility study for RESTART—a randomized controlled trial 

      Deraas, Trygve Sigvart; Hopstock, Laila Arnesdatter; Henriksen, André; Morseth, Bente; Sand, Anne-Sofie; Njølstad, Inger; Pedersen, Sigurd; Sagelv, Edvard Hamnvik; Johansson, Jonas; Grimsgaard, Sameline (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-27)
      Background - Physical inactivity and obesity are global public health challenges. Older adults are important to target for prevention and management of disease and chronic conditions. However, many individuals struggle with maintaining increased physical activity (PA) and improved diet. This feasibility study provides the foundation for the RESTART trial, a randomized controlled trial (RCT) to test ...
    • Criterion validity of two physical activity and one sedentary time questionnaire against accelerometry in a large cohort of adults and older adults 

      Sagelv, Edvard Hamnvik; Hopstock, Laila Arnesdatter; Johansson, Jonas; Hansen, Bjørge Hermann; Søren, Brage; Horsch, Alexander; Ekelund, Ulf; Morseth, Bente (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-26)
      <i>Objectives</i> - We compared the ability of physical activity and sitting time questionnaires (PAQ) for ranking individuals versus continuous volume calculations (physical activity level (PAL), metabolic equivalents of task (MET), sitting hours) against accelerometry measured physical activity as our criterion.<p> <p><i>Methods</i> - Participants in a cohort from the Tromsø Study completed ...
    • Differences in sarcopenia prevalence between upper-body and lower-body based EWGSOP2 muscle strength criteria: the Tromsø study 2015–2016 

      Johansson, Jonas; Strand, Bjørn Heine; Morseth, Bente; Hopstock, Laila Arnesdatter; Grimsgaard, Sameline (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-10)
      <p><i>Background - </i>The European Working Group on Sarcopenia in Older People (EWGSOP2) recommends grip strength and chair stand tests to be used as primary defining measures. It is unclear how either test affects prevalence estimates. <p><i>Methods - </i>This cross-sectional study involved 3498 community-dwelling participants (40–84 years) from the 7th Tromsø Study survey (2015–2016). We used ...
    • Dual-Energy X-Ray Absorptiometry Derived Adiposity Measures and Pre-Frailty/Frailty among Norwegian Adults: The Tromsø Study 2007–2015 

      Uchai, Shreeshti; Andersen, Lene Frost; Johansson, Jonas; Hopstock, Laila Arnesdatter; Hjartåker, Anette (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-25)
      OBJECTIVES: Aging is associated with changes in body composition. Excess adiposity among older adults has been linked with metabolic syndromes and aggravated age-associated decline in physical functioning. Few longitudinal studies have explored the association between dual-energy X-ray absorptiometry (DXA)-derived total as well as central adiposity measures and frailty. We examined the association ...
    • Effects of Resistance Training on Functional Strength and Muscle Mass in 70-Year-Old Individuals With Pre-sarcopenia: A Randomized Controlled Trial 

      Vikberg, Sanna; Sorlen, Niklas; Branden, Lisa; Johansson, Jonas; Nordström, Anna Hava; Hult, Andreas; Nordström, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-07)
      Objective: Sarcopenia has been defined as age-related loss of muscle mass and function. The aim of this randomized controlled trial was to examine the effects of a 10-week instructor-led resistance training program on functional strength and body composition in men and women aged 70 years with presarcopenia. Design, Setting, and Participants: Participants were randomized to either 10 weeks of a ...
    • Effects of Resistance Training on Functional Strength and Muscle Mass in 70-Year-Old Individuals With Pre-sarcopenia: A Randomized Controlled Trial. 

      Vikberg, Sanna; Sörlén, Niklas; Brandén, Lisa; Johansson, Jonas; Nordström, Anna; Hult, Andreas; Nordström, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-07)
      <i>Objective</i> - Sarcopenia has been defined as age-related loss of muscle mass and function. The aim of this randomized controlled trial was to examine the effects of a 10-week instructor-led resistance training program on functional strength and body composition in men and women aged 70 years with pre-sarcopenia.<p> <p><i>Design, Setting, and Participants</i> - Participants were randomized ...
    • Effects of Resistance Training on Functional Strength and Muscle Mass in 70-Year-Old Individuals With Pre-sarcopenia: A Randomized Controlled Trial 

      Vikberg, Sanna; Sörlén, Niklas; Brandén, Jonas; Johansson, Jonas; Nordström, Anna; Hult, Andreas; Nordström, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-07)
      <i>Objective</i> - Sarcopenia has been defined as age-related loss of muscle mass and function. The aim of this randomized controlled trial was to examine the effects of a 10-week instructor-led resistance training program on functional strength and body composition in men and women aged 70 years with pre-sarcopenia.<p> <p><i>Design, Setting, and Participants</i> - Participants were randomized ...
    • Health research requires efficient platforms for data collection from personal devices 

      Johannessen, Erlend; Henriksen, André; Årsand, Eirik; Horsch, Alexander; Johansson, Jonas; Hartvigsen, Gunnar (Journal article; Tidsskriftartikkel; Peer reviewed, 2023)
      Data from consumer-based devices for collecting personal health-related data could be useful in diagnostics and treatment. This requires a flexible and scalable software and system architecture to handle the data. This study examines the existing mSpider platform, addresses shortcomings in security and development, and suggests a full risk analysis, a more loosely coupled component- based system for ...
    • Measuring Physical Activity Using Triaxial Wrist Worn Polar Activity Trackers: A Systematic Review 

      Henriksen, André; Johansson, Jonas; Hartvigsen, Gunnar; Grimsgaard, Sameline; Hopstock, Laila Arnesdatter (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      Collecting objective physical activity data from research participants are increasingly done using consumer-based activity trackers. Several validation studies of Polar devices are conducted to date, but no systematic review of the current level of accuracy for these devices exist. The aim of this study is therefore to investigate the accuracy of current wrist-worn Polar devices that equips a triaxial ...
    • Mid-calf skeletal muscle density and its associations with physical activity, bone health and incident 12-month falls in older adults: The Healthy Ageing Initiative 

      Scott, David; Johansson, Jonas; McMillan, Lachlan; Ebeling, Peter R; Nordström, Anna Hava; Nordström, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-08)
      <i>Background</i> - Lower skeletal muscle density, indicating greater infiltration of adipose tissue into muscles, is associated with higher fracture risk in older adults. We aimed to determine whether mid-calf muscle density is associated with falls risk and bone health in community-dwelling older adults.<p><p> <i>Methods</i> - 2214 community-dwelling men and women who participated in the ...
    • Moderate-to-vigorous physical activity modifies the relationship between sedentary time and sarcopenia: the Tromsø Study 2015–2016 

      Johansson, Jonas; Morseth, Bente; Scott, David; Strand, Bjørn Heine; Hopstock, Laila Arnesdatter; Grimsgaard, Sameline (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-01)
      <p>Background: Sarcopenia is an age-related muscle disease primarily characterized by reductions in muscle strength that increases the risk of falls, fractures, cognitive impairment, and mortality. Exercise is currently preferred in prevention and treatment, but it is unknown how different habitual physical activity and sedentary behaviour patterns associate with sarcopenia status. The purpose of ...
    • A multiple risk factor program is associated with decreased risk of cardiovascular disease in 70-year-olds: A cohort study from Sweden 

      Nordström, Anna; Bergman, Jonathan; Björk, Sabine; Carlberg, Bo; Johansson, Jonas; Hult, Andreas; Nordström, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-11)
      <i>Background</i> - In individuals below 65 years of age, primary prevention programs have not been successful in reducing the risk of cardiovascular disease (CVD) and death. However, no large study to our knowledge has previously evaluated the effects of prevention programs in individuals aged 65 years or older. The present cohort study evaluated the risk of CVD in a primary prevention program for ...