{
  "abstract": "Objectives To examine the contribution of walking, running and cycling to moderate-to-vigorous physical activity (MVPA) and total physical activity (TPA) across and within seasons in adolescents and adultsMethods We included 4433 adolescents (mean age 15.4 years, range 13–17, 56.4% female) and 28 082 adults (mean age 53.1 years, range 18–103, 56.9% female) who participated in the population-based HUNT Study from 2017 to 2019. Participants wore two accelerometers (mean wear time 5.6 days (SD 1.1), range 1–7 days), one on the thigh and one on the lower back, to determine MVPA (defined as moderate/brisk walking (>4.0 km/hour), running and cycling) and TPA (MVPA plus slow walking (≤4.0 km/hour))Results Median MVPA (min/week) across seasons was 224 (36% of TPA) in adolescents and 152 (24% of TPA), 150 (22% of TPA), 100 (17% of TPA) and 34 (8% of TPA) in adults aged 18–49, 50–64, 65–74 and ≥75 years, respectively. Slow walking constituted 64% of TPA across seasons among adolescents, increasing to 92% among those aged ≥75 years.Within seasons, moderate/brisk walking constituted 77–82% of MVPA in adolescents and 72–99% in adults. Adolescents accumulated 104 min/week (IQR 58–175) less MVPA during winter than summer. The corresponding differences in adults aged 18–49 and 50–64 years were 59 (40–90) and 51 (33–77), min/week, respectively. Seasonal differences in MVPA were less pronounced in the age groups 65–74 and ≥75 years.Conclusion Moderate/brisk walking is the main contributor to MVPA in adolescents and adults. The level of MVPA, its seasonal variation and its relative proportion of TPA decrease from adolescence throughout adulthood.",
  "authors": [
    {
      "affiliations": [
        "Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway"
      ],
      "name": "Atle Kongsvold"
    },
    {
      "affiliations": [
        "Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway"
      ],
      "name": "Mats Flaaten"
    },
    {
      "affiliations": [
        "Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway"
      ],
      "name": "Eivind Schjelderup Skarpsno"
    },
    {
      "affiliations": [
        "Department of Computer Science, Norwegian University of Science and Technology, Trondheim, Norway"
      ],
      "name": "Aleksej Logacjov"
    },
    {
      "affiliations": [
        "Department of Computer Science, Norwegian University of Science and Technology, Trondheim, Norway"
      ],
      "name": "Kerstin Bach"
    },
    {
      "affiliations": [
        "Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway",
        "Clinic of Emergency Medicine and Prehospital Care, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway"
      ],
      "name": "Tom Ivar Lund Nilsen"
    },
    {
      "affiliations": [
        "Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway"
      ],
      "name": "Paul Jarle Mork"
    }
  ],
  "title": "Contribution of walking, running and cycling to moderate-to-vigorous and total physical activity in adolescents and adults across and within seasons: cross-sectional data from the Norwegian HUNT Study",
  "uid": "832d2a8d-a68a-55e0-8896-4ef58c9d8ea2"
}