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  • Author: Anders Pedersen x
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Anders Lindelof, Claus Vinther Nielsen and Birthe D. Pedersen

Background:

Individuals’ attitude toward physical activity may contribute to their willingness to participate in such behavior. This study qualitatively and longitudinally explored obese adolescents’ attitudes to physical activity.

Methods:

Fifteen obese adolescents were recruited at a weight loss camp. Participants were followed for 2.5 years with 3 yearly rounds of participant observations and interviews. Data were analyzed using a phenomenological-hermeneutic approach.

Results:

Four categories were identified: 1) throughout the study participants became more sedentary as they de-selected activities like bike riding; 2) participants did not perceive their increasing inactive lifestyle as hindering weight loss as they consider such activities as futile compared with vigorously hard exercise; 3) participants frequently failed to participate in hard exercise, like going to the gym; and 4) participants had a genuine antipathy against being physical active.

Conclusions:

Among others, a reason why obese adolescents fail to live an active life is that they find limited pleasure in such behavior. It is argued that obese adolescents need a positive attitude toward physical activity if they are to be more active. With reference to Bourdieu’s theory of practice, it is hypothesized that such attitude needs to be learned through everyday life by experiencing joy and meaning by being physical active.

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Anders Grøntved, Grete Skøtt Pedersen, Lars Bo Andersen, Peter Lund Kristensen, Niels Christian Møller and Karsten Froberg

Independent associations between personal- and demographic characteristics and physical activity in 3–6 year old children attending preschool were identified in this study. Boys spent a larger proportion of the time on moderate-and-vigorous physical activity (MVPA; p < .001) and had a higher total physical activity level compared with girls (p < .001). The 3–4 year old children spent less time on MVPA and had a lower total physical activity level compared with both 4–5 (p < .01) and 5–6 year old children (p < .001). The individual preschool, gender and age of preschool children were strong predictors of physical activity (R2-total model=(0.36−0.39)) during preschool attendance.

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Ulrika Andersson-Hall, Stefan Pettersson, Fredrik Edin, Anders Pedersen, Daniel Malmodin and Klavs Madsen

Purpose: This study investigated how postexercise intake of placebo (PLA), protein (PRO), or carbohydrate (CHO) affected fat oxidation (FO) and metabolic parameters during recovery and subsequent exercise. Methods: In a cross-over design, 12 moderately trained women (VO2max 45 ± 6 ml·min−1·kg−1) performed three days of testing. A 23-min control (CON) incremental FO bike test (30–80% VO2max) was followed by 60 min exercise at 75% VO2max. Immediately postexercise, subjects ingested PLA, 20 g PRO, or 40 g CHO followed by a second FO bike test 2 h later. Results: Maximal fat oxidation (MFO) and the intensity at which MFO occurs (Fatmax) increased at the second FO test compared to the first following all three postexercise drinks (MFO for CON = 0.28 ± 0.08, PLA = 0.57 ± 0.13, PRO = 0.52 ± 0.08, CHO = 0.44 ± 0.12 g fat·min−1; Fatmax for CON = 41 ± 7, PLA = 54 ± 4, PRO = 55 ± 6, CHO = 50 ± 8 %VO2max, p < 0.01 for all values compared to CON). Resting FO, MFO, and Fatmax were not significantly different between PLA and PRO, but lower for CHO. PRO and CHO increased insulin levels at 1 h postexercise, though both glucose and insulin were equal with PLA at 2 h postexercise. Increased postexercise ketone levels only occurred with PLA. Conclusion: Protein supplementation immediately postexercise did not affect the doubling in whole body fat oxidation seen during a subsequent exercise trial 2 h later. Neither did it affect resting fat oxidation during the postexercise period despite increased insulin levels and attenuated ketosis. Carbohydrate intake dampened the increase in fat oxidation during the second test, though a significant increase was still observed compared to the first test.