Combinations of Epoch Durations and Cut-Points to Estimate Sedentary Time and Physical Activity Among Adolescents

Fröberg, Andreas,1985Gothenburg University,Göteborgs universitet,Institutionen för kost- och idrottsvetenskap,Department of Food and Nutrition, and Sport Science (author)

The purpose of the current study was to investigate how combinations of different epoch durations and cut-points affect the estimations of sedentary time and physical activity in adolescents. Accelerometer data from 101 adolescents were derived and 30 combinations were used to estimate sedentary time, light, moderate, vigorous, and combined moderate-to-vigorous physical activity. Data were analyzed with repeated measurement analyses of variance. Large differences of sedentary time and times of different physical activity intensities were observed between 1 s and longer epoch durations using virtually all cut-points. Generally, sedentary time, moderate physical activity, vigorous physical activity, and combined moderate-to-vigorous physical activity progressively decreased, whereas light physical activity increased with longer epoch durations. The extreme differences between cut-points were large and increased with longer epoch durations for sedentary time and for all physical activity intensities except for vigorous physical activity per epoch duration. Caution is required when cross-comparing studies using different epoch durations and cut-points. To accurately register adolescents’ spontaneous intermittent physical activity behavior, short epoch durations are recommended.

Berg, Christina,1963Gothenburg University,Göteborgs universitet,Institutionen för kost- och idrottsvetenskap,Department of Food and Nutrition, and Sport Science(Swepub:gu)xbchrq (author)
Larsson, Christel,1972Gothenburg University,Göteborgs universitet,Institutionen för kost- och idrottsvetenskap,Department of Food and Nutrition, and Sport Science(Swepub:gu)xlachr (author)
Boldemann, CeciliaKarolinska Institutet (author)
Raustorp, Anders,1958-Gothenburg University,Göteborgs universitet,Linnéuniversitetet,Institutionen för idrottsvetenskap (ID),University of Gothenburg,HA,Institutionen för kost- och idrottsvetenskap,Department of Food and Nutrition, and Sport Science(Swepub:gu)xrausa (author)
Göteborgs universitetInstitutionen för kost- och idrottsvetenskap (creator_code:org_t)

In:Measurement in Physical Education and Exercise Science: Taylor & Francis21:3, s. 154-1601091-367X1532-7841
In:International Society of Behavioral Nutrition and Physical Activity: Taylor & Francis21:3, s. 154-160

By the author/editor: Fröberg, Andreas ...; Berg, Christina, ...; Larsson, Christe ...; Boldemann, Cecil ...; Raustorp, Anders ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Health Sciences; and Sport and Fitnes ...

By the university: Linnaeus University; University of Gothenburg; Karolinska Institutet

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