Role of physical activity in bone health in peripubertal boys

Ivuškāns, Artūrs; Jürimäe, Toivo; Lätt, Evelin; Jürimäe, Jaak; Purge, Priit; Minha, Sa’ar; Maasalu, Katre; Mäestu, Evelin

doi:10.1111/ped.12337

Cited by 8 publications

(12 citation statements)

References 28 publications

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“…It is known that children with obesity are taller and their pubertal development starts earlier than in normal-weight children [35,38]. Therefore, we would have expected that our OWB group would be more advanced in their puberty, but this was not the case, similar to what has been found in other studies [37,39]. The mean serum concentrations of acylated ghrelin, des-acyl ghrelin, and PYY were not different between the study groups.…”

Section: Discussionsupporting

confidence: 60%

“…PA was included in further analyses only if the subject had accumulated a minimum of 8 h of activity data per day for at least 2 weekdays and 1 weekend day. The total amount of PA was expressed as the total number of counts divided by the registered time (counts/min) [37]. These data were available for 47 boys in the OWB group and for 132 boys in the NWB group.…”

Section: Methodsmentioning

confidence: 99%

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Associations between Bone Mineral Characteristics and Serum Levels of Ghrelin and Peptide YY in Overweight Adolescent Boys

et al. 2015

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Background/Aims: The role of ghrelin and peptide YY (PYY) in bone mineralization is not fully known. The aim of this study was to determine whether acylated and des-acyl ghrelin and PYY in addition to leptin are related to bone mineral density (BMD) in adolescent overweight boys (OWB) and normal-weight boys (NWB). Participants and Methods: Fifty- five OWB (BMI >85th percentile) and 154 NWB (BMI <85th percentile) aged 12-16 years participated in this study. Fasting serum acylated and des-acyl ghrelin, PYY, leptin, testosterone levels, total body (TB) and lumbar spine (LS) bone mineral content (BMC), and BMD were measured. TB BMC for height and TB and LS bone mineral apparent density (BMAD) were calculated. Results: No differences were seen in acylated and des-acyl ghrelin or PYY levels, while the leptin levels were significantly higher in the OWB compared to the NWB. In the OWB, TB BMAD was positively correlated with acylated ghrelin and leptin, and TB BMC for height was positively correlated with PYY. In the OWB, the variability of TB BMD was determined by TB fat-free mass and des-acyl ghrelin, whereas the variability of TB BMAD was determined by leptin. Conclusions: Des-acyl ghrelin and PYY are involved in the bone mineralization process in puberty, and the impact can vary between normal and overweight subjects.

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Section: Discussionsupporting

confidence: 60%

Section: Methodsmentioning

confidence: 99%

Associations between Bone Mineral Characteristics and Serum Levels of Ghrelin and Peptide YY in Overweight Adolescent Boys

et al. 2015

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“…After screening on title and abstract, 282 articles remained for potential inclusion for which full text was assessed. Finally, 27 articles were included in this systematic review .…”

Section: Resultsmentioning

confidence: 99%

Differences in bone mineral density between normal‐weight children and children with overweight and obesity: a systematic review and meta‐analysis

et al. 2017

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“…The present study analysed data from the fourth wave of a larger project 'Risk factors for metabolic syndrome in boys during pubertal development: a longitudinal study with special attention to physical activity and fitness' (30)(31)(32)(33)(34)(35)(36)(37)(38)(39) . The study was originally started in 2009, where all boys from Grades 3 and 4 from twenty-seven elementary schools in the city and the surroundings of Tartu, Estonia, were invited to participate.…”

Section: Study Populationmentioning

confidence: 99%

Diet misreporting can be corrected: confirmation of the association between energy intake and fat-free mass in adolescents

et al. 2016

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Subjective energy intake (sEI) is often misreported, providing unreliable estimates of energy consumed. Therefore, relating sEI data to health outcomes is difficult. Recently, Börnhorst et al. compared various methods to correct sEI-based energy intake estimates. They criticised approaches that categorise participants as under-reporters, plausible reporters and over-reporters based on the sEI:total energy expenditure (TEE) ratio, and thereafter use these categories as statistical covariates or exclusion criteria. Instead, they recommended using external predictors of sEI misreporting as statistical covariates. We sought to confirm and extend these findings. Using a sample of 190 adolescent boys (mean age=14), we demonstrated that dual-energy X-ray absorptiometry-measured fat-free mass is strongly associated with objective energy intake data (onsite weighted breakfast), but the association with sEI (previous 3-d dietary interview) is weak. Comparing sEI with TEE revealed that sEI was mostly under-reported (74 %). Interestingly, statistically controlling for dietary reporting groups or restricting samples to plausible reporters created a stronger-than-expected association between fat-free mass and sEI. However, the association was an artifact caused by selection bias - that is, data re-sampling and simulations showed that these methods overestimated the effect size because fat-free mass was related to sEI both directly and indirectly via TEE. A more realistic association between sEI and fat-free mass was obtained when the model included common predictors of misreporting (e.g. BMI, restraint). To conclude, restricting sEI data only to plausible reporters can cause selection bias and inflated associations in later analyses. Therefore, we further support statistically correcting sEI data in nutritional analyses. The script for running simulations is provided.

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Role of physical activity in bone health in peripubertal boys

Abstract: In overweight peripubertal boys, physical activity is more associated with bone mineral parameters compared to normal weight subjects. In addition to vigorous physical activity, moderate physical activity has a significant impact on bone mineral parameters in overweight subjects.

Cited by 8 publications

References 28 publications

Associations between Bone Mineral Characteristics and Serum Levels of Ghrelin and Peptide YY in Overweight Adolescent Boys

Associations between Bone Mineral Characteristics and Serum Levels of Ghrelin and Peptide YY in Overweight Adolescent Boys

Differences in bone mineral density between normal‐weight children and children with overweight and obesity: a systematic review and meta‐analysis

Diet misreporting can be corrected: confirmation of the association between energy intake and fat-free mass in adolescents

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