scholarly journals Bone Mass in Prepubertal Children: Gender Differences and the Role of Physical Activity and Sunlight Exposure1

1998 ◽  
Vol 83 (12) ◽  
pp. 4274-4279 ◽  
Author(s):  
G. Jones ◽  
T. Dwyer
Keyword(s):  
Physical Activity ◽  
Gender Differences ◽  
Body Composition ◽  
Muscle Strength ◽  
Bone Mass ◽  
Sports Participation ◽  
Sunlight Exposure ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Age Group

Retrospective studies have suggested that the prepubertal years may be an important window of opportunity to increase bone mass, but there have been few direct studies and little exploration of gender differences in this age group. In this study, we report the associations among physical activity measures, sunlight exposure, body composition, and bone mass in 8-yr-old children. We studied 330 children in 1996 (115 girls and 215 boys; response rate, 60%) who had previously taken part in a cohort study of cot death in 1988. They had measurement of anthropometrics (height, weight, and body composition), sunlight exposure (by questionnaire), and physical activity[ questionnaire, muscle strength by dynamometry, and bicycle ergometric physical work capacity at a pulse of 170 beats/min (PWC170)]. Bone mineral density (BMD) was assessed at the spine, femoral neck, and total body by a Hologic QDR2000 densitometer. In females only, PWC170[ hip, 2.4%/quartile (95% confidence interval (CI), 0.3–4.5); spine, 1.7%/quartile (95% CI, 0.0–3.4); size adjusted] was associated with BMD, whereas in males only, BMD was associated with both sports participation (hip, 4.2% (95% CI, 1.1–7.3); spine, 4.3% (95% CI, 0.9–7.7)] and muscle strength [hip, 1.7%/quartile (95% CI, 0.0–3.4); but not spine; size adjusted]. Winter sunlight exposure was associated with BMD in girls [hip, 2.9%/category (95% CI, 0.7–5.0); spine, 3.6%/category (95% CI, 1.4–5.8)], but not in boys [hip, 0.3%/category (95% CI, −1.4 to +2.0); spine, 1.4%/category (95% CI, −0.7 to +3.5)]. Males and females were very similar in body size. However, males had higher size-adjusted BMD at the hip (9.6%; 95% CI, 6.9–14), whereas females had higher size-adjusted BMD at the spine (3.2%; 95% CI, 0.8–5.6%). In conclusion, this study has suggested that physical activity and exposure to sunlight are important in the bone mineralization of prepubertal male and female children. The magnitude of both gender and environmental differences in bone mass in this age group is substantial, suggesting that modification at this stage of life may influence peak bone mass and possibly fracture risk in later life.

Relationship Between Physical Activity and the Objective Indicators of Physical Capital for Women in Fitness

2015 ◽  
Vol 6 (2) ◽  
pp. 21-35
Author(s):  
Aleksandra Čuprika ◽  
Andra Fernāte ◽  
Leonīds Čupriks
Keyword(s):  
Physical Activity ◽  
Body Composition ◽  
Physical Fitness ◽  
Functional State ◽  
Physical Capital ◽  
Work Capacity ◽  
Physical Work ◽  
Physical Work Capacity ◽  
The Impact ◽  
Objective Indicators

Abstract As it is mentioned in the action direction Healthy and Workable Individual of the National Development Plan of Latvia 2012 –2020: 30% of all the dead in Latvia have lost their life at the age of being able to work. The main causes of death rate are different diseases (cardio-vascular a.o.), as well as outer death causes (injuries) (Pudule et al, 2012; Štale et al, 2013). Only 8% of the EU and 6% of the Latvian population regularly perform moderate and very difficult physical activity (PA) (Eurobarometer, 2013). Therefore it is necessary to implement purposeful and effective health promoting and risk limiting events to develop the physical capital of one. The understanding of the impact of physical activity on one’s physical capital is not well explored in the previous studies (Hutson, 2012; Maguire, 2008; Goldenberg, 2003; Hedblom, 2009). Therefore, the aim of the study is to determine the relationship between PA and the objective indicators of physical capital for women in fitness. In the study voluntarily participated 33 women (30±4.1 years) from 2 fitness clubs in Riga. In order to determine the respondents’ objective indicators of physical capital were applied: bioimpedance method (TANITA SC330, Japan, 89/336/EC), heart rate variability analysis data processing software ‘Omega’, complex load test with expiratory gas analysis (VIASYS Healthcare GMBH, Germany) and Eirofit tests for adults. In order to determine the level of PA the IPAQ (Craig et al, 2003) short version in Latvian (Kaupuzs & Larins, 2010) was used. Descriptive and inferential statistics were made (SPSS ver.18.0). Several moderately close (0.5<|rs|<0.69; p<0.01) and close correlations (0.7<|rs|<0.99; p<0.01) are determined between the level of PA and indicators of body composition, physical work capacity, physical fitness and functional state of the body. The level of PA has a positive impact on the objective indicators of physical capital. The more physically active the respondent is, the better physical fitness, higher work capacity, better the indicators of his body composition are and better functional state.

scholarly journals Physical Activity Behaviors and Physical Work Capacity in University Students during the COVID-19 Pandemic

2022 ◽  
Vol 19 (2) ◽  
pp. 891
Author(s):  
Grzegorz Bielec ◽  
Aneta Omelan
Keyword(s):  
Physical Activity ◽  
Body Composition ◽  
University Students ◽  
Work Capacity ◽  
The Body ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Metabolic Equivalent ◽  
Metabolic Equivalent Of Task ◽  
On Line

Objective. The COVID-19 pandemic led to restricted access to sports and recreation facilities, resulting in a general decrease in physical activity. Many studies present the results of on-line questionnaires conducted during the pandemic, but there are few reports of objectively measured indicators of physical condition. Thus, the objective of this study was to assess the changes in physical work capacity, body composition, and physical activity behaviors in university students during 14 weeks of lockdown. Material and Methods. Twenty students of Tourism and Recreation (13 female and 7 male) participated in the study. The first examination was conducted in November 2020, and the second in March 2021. Body composition was assessed with a Tanita 418 MA device. The students performed the PWC 170 cycling test and completed the International Physical Activity Questionnaire (short version) on-line. Results. Neither physical work capacity nor body composition parameters changed substantially during the analyzed period. In the female students, vigorous physical activity decreased significantly, but no substantial changes occurred in weekly metabolic equivalent of task. In male students, walking days and metabolic equivalent of task decreased, but the changes were not significant. Conclusions. Fourteen weeks of COVID-19 lockdown had little effect on the body composition, physical work capacity level, and physical activity habits of Tourism and Recreation students. Studies with larger groups of participants should verify the current conclusions, and care should be taken when extrapolating to other populations.

Association of body composition, physical activity and physical performance with knee cartilage thickness and bone area in young adults

Rheumatology ◽  
2019 ◽  
Vol 59 (7) ◽  
pp. 1607-1616
Author(s):  
Tao Meng ◽  
Benny Antony ◽  
Alison Venn ◽  
Felix Eckstein ◽  
Flavia Cicuttini ◽  
...  
Keyword(s):  
Physical Activity ◽  
Young Adults ◽  
Body Composition ◽  
Physical Performance ◽  
Lean Mass ◽  
Cartilage Thickness ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Bone Area ◽  
Knee Cartilage

Abstract Objective To describe associations of body composition, physical activity and physical performance with knee cartilage thickness and subchondral bone area in young adults. Methods Body composition, physical activity and physical performance were measured 4–5 years prior to knee MRI. Cartilage thickness and bone area were measured quantitatively from MRI. Associations were assessed using linear regression analysis, with mediators being identified using mediation analysis. Results Participants (n = 186) were 31–41 years of age when the MRI was acquired and 48% were female. Greater lean mass was positively associated with cartilage thickness [β = 6.52 μm/kg (95% CI 0.86, 12.18)] and bone area [β = 13.37 mm2/kg (95% CI 5.43, 21.31)]. Physical performance measures were positively associated with cartilage thickness [long jump: β = 2.44 μm/cm (95% CI 0.70, 4.18); hand grip strength: 7.74 μm/kg (95% CI 1.50, 13.98); physical work capacity: 1.07 μm/W (95% CI 0.29, 1.85)] and bone area [long jump: β = 3.99 mm2/cm (95% CI 0.64, 7.34); hand grip strength: 19.06 mm2/kg (95% CI 7.21, 30.92); leg strength: 3.18 mm2/kg (95% CI 1.09, 5.28); physical work capacity: 3.15 mm2/W (95% CI 1.70, 4.60)]. Mediation analysis suggested these associations were mediated by lean mass (effect mediated: 27–95%). Conclusion Greater lean mass and better physical performance measured 4–5 years prior were associated with greater knee cartilage thickness and subchondral bone area in young adults, and the associations of physical performance were largely mediated by lean mass. These findings suggest lean mass may play an important role in maintaining knee joint health in young adults.

scholarly journals 12-Month changes of muscle strength, body composition and physical activity in adults with dystrophinopathies

2020 ◽  
pp. 1-8
Author(s):  
Matthew F. Jacques ◽  
Gladys L. Onambele-Pearson ◽  
Neil D. Reeves ◽  
Georgina K. Stebbings ◽  
Ellen A. Dawson ◽  
...  
Keyword(s):  
Physical Activity ◽  
Body Composition ◽  
Muscle Strength

scholarly journals Body Composition, Physical Activity, and Convenience Food Consumption among Asian American Youth: 2011–2018 NHANES

2020 ◽  
Vol 17 (17) ◽  
pp. 6187
Author(s):  
Soyang Kwon ◽  
Meme Wang-Schweig ◽  
Namratha R. Kandula
Keyword(s):  
Physical Activity ◽  
Body Composition ◽  
Muscle Strength ◽  
Food Consumption ◽  
Asian American ◽  
Convenience Food ◽  
White American ◽  
Asian American Youth ◽  
Racial Ethnic ◽  
Hispanic White

The primary purpose of this study was to describe obesity, body composition, convenience food consumption, physical activity, and muscle strength among Asian American youth compared to other racial/ethnic groups. The secondary purpose was to examine whether obesity, body composition, convenience food consumption, physical activity, and muscle strength differed by acculturation levels among Asian American youth. A secondary analysis was conducted using data from 12,763 children aged 2 to 17 years that participated in the 2011–2018 US National Health and Nutrition Examination Survey (NHANES). In the NHANES interview, acculturation, dietary behavior, and physical activity questionnaires were administered. The acculturation level was indicated by the language spoken at home. In the NHANES examination, anthropometry, dual-energy X-ray absorptiometry (DXA), and muscle strength assessments were conducted. Compared to non-Hispanic White American boys, Asian American boys had similar levels of obesity, central obesity, and fat mass. Among the five racial/ethnic groups examined, lean body mass, muscle mass, convenience food consumption, and daily physical activity were the lowest in the Asian group. More acculturated Asian American boys, but not girls, were more likely to be obese (OR = 3.28 (1.63, 6.60)). More acculturated Asian American youth more frequently consumed convenience food (1.4 more meals/month (1.2, 1.6)). This study highlights the obesity problem among Asian American boys, which worsens with acculturation to America. The study results also suggest that although Asian American youth consume less convenience food overall than non-Hispanic White American youth, increasing acculturation may negatively influence food choices.

A seven-year physical activity intervention for children increased gains in bone mass and muscle strength

2016 ◽  
Vol 105 (10) ◽  
pp. 1216-1224 ◽  
Author(s):  
Jesper Fritz ◽  
Björn E. Rosengren ◽  
Magnus Dencker ◽  
Caroline Karlsson ◽  
Magnus K. Karlsson
Keyword(s):  
Physical Activity ◽  
Muscle Strength ◽  
Bone Mass ◽  
Physical Activity Intervention

Relation of Academic Performance to Physical Activity and Fitness in Children

2001 ◽  
Vol 13 (3) ◽  
pp. 225-237 ◽  
Author(s):  
Terence Dwyer ◽  
James F. Sallis ◽  
Leigh Blizzard ◽  
Ross Lazarus ◽  
Kimberlie Dean
Keyword(s):  
Physical Activity ◽  
Academic Performance ◽  
Work Capacity ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Cross Sectional ◽  
Standing Long Jump ◽  
Long Jump ◽  
Nationally Representative ◽  
School Ratings

The objective of this study was to examine the association of scholastic performance with physical activity and fitness of children. To do so, school ratings of scholastic ability on a five-point scale for a nationally representative sample of 7,961 Australian schoolchildren aged 7–15 years were compared with physical activity and fitness measurements. Consistently across age and sex groups, the ratings were significantly correlated with questionnaire measures of physical activity and with performance on the 1.6-kilometer run, sit-ups and push-ups challenges, 50-meter sprint, and standing long jump. There were no significant associations for physical work capacity at a heart rate of 170 (PWC170). The results are concordant with the hypothesis that physical activity enhances academic performance, but the cross-sectional nature of the observations limits causal inference, and the disparity for PWC170 gives reason to question whether the associations were due to measurement bias or residual confounding.

Body Composition and Its Relationship to Growth and Bone Mass in Patients with Thalassemia

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 3890-3890
Author(s):  
Ellen Fung ◽  
Yan Xu ◽  
Janet Kwiatkowski ◽  
Sylvia Titi Singer ◽  
Ashutosh Lal ◽  
...  
Keyword(s):  
Physical Activity ◽  
Body Composition ◽  
Nutritional Status ◽  
Bone Mass ◽  
Body Fat ◽  
Lean Mass ◽  
Bone Health ◽  
Calcium Intake ◽  
Z Score ◽  
Percentage Body Fat

Abstract Optimal nutritional status is imperative for achieving the genetic potential for growth and development in children as well as for robust immune function and bone health in adults. Patients with thalassemia (Thal) are known to have abnormal growth, altered development and immune function and deficits in bone mass. For children, weight and height is commonly used to assess overall nutritional status, whereas for adults, body composition is a gross marker of an individual’s overall nutritional health. Nutritional status and body composition has not been explored in patients with Thal. To examine this, we have assessed body composition (fat, lean) and bone density by dual energy x-ray absorptiometry (DXA, Hologic Delphi A) in 370 subjects enrolled in a cross-sectional study of the Thal Clinical Research Network (TCRN), a North American collaborative research group. In addition to DXA, weight and height were measured, medical history obtained and a brief calcium food frequency and physical activity questionnaire completed. The total sample was divided into 2 groups: (TxThal) 257 transfused thalassemia major and E-beta thal patients (23.7 ± 11 yr, 131 male), and (NTxThal) 113 never or minimally transfused patients with other thalassemia syndromes (21.3 ± 13 yr, 50 male). Body mass index (BMI) was calculated (kg/m2) and cutoffs determined for children (<17=underweight, ≥30 obese) and adults (<18.5=underweight, ≥30 obese). As expected there was a high correlation between BMI and fat and lean mass by DXA (r=0.7 to 0.86, p<0.001). 6.2% of adults and 39.3% of children were classified as underweight by BMI and nearly 1/3 of children with Thal had abnormally low percentage body fat; while only 3.4% of adults and 2.2% of children were considered obese. Compared to median data from NHANES, adult patients with Thal are much leaner (BMI: 22.8±0.4) compared to contemporary adult Americans (28.1±0.2, p<0.0001). TxThal had more total body fat mass (14.3 vs 11.4 g, p<0.0001) and percentage body fat (27.3% vs. 24.9% p=0.007) compared to NTxThal. As has been observed in epidemiological studies of healthy subjects, calcium intake was inversely related to fat mass (p=0.009) as well as lean mass (p=0.007) after controlling for the effects of age, gender and diagnosis. Current physical activity level was a strong predictor of reduced body fat (p=0.007), whereas hemoglobin level was positively related to lean mass (p=0.001). Moreover, body fat was a positive predictor for height Z-score (p<0.0001). Low bone mass (BMD Z-Score <−2.0) was found in 50% of subjects, and BMD Z-score was moderately correlated with height Z-score (p<0.0001) and weight Z-score (p<0.0001). Though the majority of patients with Thal were classified as having a healthy body composition with very few obese patients, nearly 40% of the children in this sample were underweight. NTxThal appear at particular risk for underweight. These results suggest that an adequate amount of body fat is necessary for optimal growth and bone health in patients with Thal, and that calcium intake is associated with optimal body composition. These preliminary findings support the need for more careful study of nutritional status and its relationship to overall health in patients with thalassemia.

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