scholarly journals Sleeping habits of adolescents in relation to their physical activity and exercise output: results from the ELSPAC study

2018 ◽  
Vol 72 (12) ◽  
pp. 1141-1146 ◽  
Author(s):  
Jan Máchal ◽  
Filip Zlámal ◽  
Lubomír Kukla ◽  
Jan Švancara ◽  
Hynek Pikhart ◽  
...  
Keyword(s):  
Physical Activity ◽  
Physical Fitness ◽  
Sleep Duration ◽  
Parental Education ◽  
Sport Activity ◽  
Work Capacity ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Obese Adolescent ◽  
Sleep Timing

BackgroundLittle is known about the effects of physical activity and fitness on sleep timing parameters in adolescence.MethodsWe investigated the development of sleep timing between age 8 and 15 and its association with physical fitness at age 15 in 787 adolescents (408 males, 379 females). Physical fitness was measured using the physical work capacity (PWC) protocol. Information on sport activity was collected at ages 11 and 15. Finally, the contribution of other covariates (sex, body mass index (BMI), parental education and occupational skill level) to the association between sleep parameters and physical fitness was evaluated. The correlation of BMI and physical fitness was assessed separately.ResultsMild correlation of sleep duration at ages 8 and 15 was observed (r=0.08–0.16). Higher sport activity participation and physical fitness were found to be mildly associated with delayed bedtime and reduced sleep duration; the association with bedtime was significant after adjustment for all covariates. Sport activity at age 11 was not associated with sleep timing at age 15. Interestingly, higher BMI was linked to delayed bedtime and higher physical fitness.ConclusionOur findings do not support existing hypotheses suggesting the association of low physical activity and fitness with shorter sleep duration and high BMI in a generally non-obese adolescent population without severe sleep restriction.

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.

Is Fitness Level in Childhood Associated with Physical Activity Level as an Adult?

2009 ◽  
Vol 21 (3) ◽  
pp. 329-338 ◽  
Author(s):  
François Trudeau ◽  
Louis Laurencelle ◽  
Roy J. Shephard
Keyword(s):  
Physical Activity ◽  
Physical Fitness ◽  
Physical Activity Level ◽  
Work Capacity ◽  
Activity Level ◽  
Perceived Barriers ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Fitness Level ◽  
Barriers To Exercise

The purpose of this study was to examine the possible influence of childhood physical fitness on physical activity level and some of its psychosocial determinants as an adult. Childhood (age 10–12 years) data from the longitudinal Trois-Rivières Growth and Development Study (body mass index, Physical Work Capacity (PWC170)), number of sit-ups/min, left + right hands grip strength) were correlated with adult data (age 35.0 ± 0.3 years) for physical activity (PA) level, attitude toward PA, intention to exercise, perceived barriers to exercise and support of an active lifestyle by significant others. No significant relationships between childhood physical fitness and adulthood PA were found. Although the sample size is relatively small, our data suggest that the preadolescent physical fitness level has no measurable impact on adult habitual PA, attitudes toward PA, intentions to exercise, perceived barriers to exercise or support from the individual’s entourage.

Physical Fitness and the Metabolic Syndrome in Adults From the Quebec Family Study

2005 ◽  
Vol 30 (2) ◽  
pp. 140-156 ◽  
Author(s):  
Normand G. Boulé ◽  
Claude Bouchard ◽  
Angelo Tremblay
Keyword(s):  
Metabolic Syndrome ◽  
Physical Fitness ◽  
Hdl Cholesterol ◽  
Work Capacity ◽  
Abdominal Fat ◽  
Fat Free Mass ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Abdominal Adiposity ◽  
The Metabolic Syndrome

Physically fit individuals have a lower risk of cardiovascular disease and type 2 diabetes. However, it is unknown whether the associations between physical fitness and the metabolic syndrome are independent of total and abdominal adiposity. Physical fitness was defined as the physical work capacity on a cycle ergometer at heart rate of 150 bpm (PWC 150) in a sample of 158 men and 198 women 20-60 years of age. PWC 150 was adjusted for fat-free mass prior to the analyses. Percent body fat was estimated by hydrostatic weighing. Visceral and subcutaneous abdominal fat were measured by computed tomography. The prevalence of the metabolic syndrome was based on two definitions. The metabolic syndrome decreased with increasing fitness in men (approx. 6 times higher in less fit vs. most fit fertile, p <  0.05) and in women (approx. 4 times higher in less fit vs. most fit tertile, p <  0.05). Fitness was negatively associated with most individual components of the metabolic syndrome, except HDL-cholesterol for which the correlation was positive. However, in men and in women, the effects of physical fitness on the individual components of the metabolic syndrome were attenuated after considering total and abdominal adiposity. Key words: aerobic capacity, adiposity, abdominal fat, insulin resistance syndrome

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.

The Relationship between Peak Oxygen Uptake and Physical Activity in 6- to 8-Year-Old Children

1989 ◽  
Vol 1 (2) ◽  
pp. 127-136 ◽  
Author(s):  
Juliane R. Fenster ◽  
Patty S. Freedson ◽  
Richard A. Washburn ◽  
R. Curtis Ellison
Keyword(s):  
Physical Activity ◽  
Aerobic Capacity ◽  
Large Scale ◽  
Work Capacity ◽  
Peak Oxygen Uptake ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Activity Levels ◽  
Activity Method ◽  
The Relationship

The relationship between physical activity measured using the LSI (Large Scale Integrated Activity Monitor), and questionnaire, with physical work capacity 170 (PWC 170) and aerobic capacity (peak V̇O2) was evaluated in 6- to 8-year-old children (n = 18). The mean (± SD) peak V̇O2 was 44.1 ± 5.6 ml • kg−1 • min−1. Peak V̇O2 was not significantly different for children (n = 8) who had completed two treadmill trials (45.4 vs. 43.5 ml • kg−1 • min−1; R = 0.67, p<0.05). The log LSI expressed as counts per hour (M ± SD = 2.1 ±.22 cts/hr) was the only activity method significantly related to peak V̇O2 (r = 0.59, p<0.05). The correlation between peak V̇O2 with the questionnaire was positive but nonsignificant (r = 0.20). PWC 170 was not related to peak V̇O2 (r = 0.21) or the activity variables (r = 0.12 questionnaire; r = 0.18 log LSI). When the group was divided into high and low peak V̇O2 groups (high: M = 48.8 ml • kg−1 • min−1; low: M = 39.5 ml • kg−1 • min−1), the log LSI was able to distinguish significant differences in activity levels (high: 2.23 ±. 19 cts/hr; low: 1.99±.19 cts/hr). This study suggests that activity measured with the LSI and aerobic capacity are related in this sample of 6- to 8-year-old children.

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.

Physical Work Capacity in Chronic Renal Disease

1987 ◽  
Vol 10 (1) ◽  
pp. 23-30 ◽  
Author(s):  
A. Kettner-Melsheimer ◽  
M. Weiβ ◽  
W. Huber
Keyword(s):  
Muscle Strength ◽  
Renal Disease ◽  
Physical Fitness ◽  
Chronic Renal Disease ◽  
Work Capacity ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Dialysis Patients ◽  
Creatinine Concentration ◽  
Cardiovascular Capacity

We studied the physical fitness of 71 patients with renal disease before dialysis, after starting dialysis, and after successful renal transplantation. Maximal muscle strength was determined in 58 patients and maximal cardiovascular capacity was assessed in 36 patients. Before dialysis there was a 31 percent reduction in muscle strength in men and 47 percent in women. The loss of muscle strength was most pronounced in the leg extensors. Cardiovascular capacity and muscle strength was positively correlated in the dialysis patients (p ≤ 0.05). The cardiovascular capacity was decreased 29% in predialysis patients, 45% in dialysis patients and 37% in transplanted patients compared to untrained healthy controls. The predialysis patients had a 19% greater cardiovascular capacity than the dialysis patients and a 9% greater cardiovascular capacity than the transplanted patients. While hemoglobin concentrations showed a positive correlation (p ≤ 0.05) with maximal cardiovascular capacity and creatinine concentration showed a negative correlation (p ≤ 0.05) with maximal cardiovascular capacity in the predialysis patients, hemoglobin concentrations and creatinine concentrations did not correlate with cardiovascular capacity in the dialysed and transplanted patients. In dialysis patients as well as in patients after kidney transplantation hemoglobin and creatinine concentrations, muscle strength, height, weight, and age are factors influencing the physical work capacity, but none of these variables alone seems to be a strong determination factor. Besides the complications of kidney disease which may itself reduce physical fitness, the lack of physical training is an important factor in determining the residual muscle strength and cardiovascular capacity for all patients with renal insufficiency.

Three Days Fast in Sportsmen Decreases Physical Work Capacity but Not Strength or Perception-Reaction Time

2001 ◽  
Vol 11 (4) ◽  
pp. 420-429 ◽  
Author(s):  
Ángel Gutiérrez ◽  
Marcela González-Gross ◽  
Manuel Delgado ◽  
Manuel J. Castillo
Keyword(s):  
Physical Activity ◽  
Reaction Time ◽  
Grip Strength ◽  
Respiratory Exchange Ratio ◽  
Work Capacity ◽  
Hand Grip Strength ◽  
Physical Work ◽  
Physical Work Capacity ◽  
Hand Grip ◽  
Training Activities

This study investigates, in young nonobese healthy athletes, the consequences of a 3-day fast coupled, or not, to enhanced physical activity. Eight male subjects, aged 21 ± 2 years, fasted for 3 days on two separate occasions, 4 weeks apart. On the first occasion, subjects continued their daily training activities. On the second occasion, a daily physical exercise program was added to these activities. Subjects were evaluated before and after 24 hours and 72 hours of fasting. Evaluation consisted of body composition, basal respiratory exchange ratio, plasma metabolic parameters, perception-reaction time (both simple and discriminant), hand grip strength, and physical work capacity at 170 beats per minute (PWC170). Fasting determined significant reductions in body weight, body fat, and muscle mass. These reductions were not affected by enhanced physical activity. Basal respiratory exchange ratio decreased with fasting but was not influenced by increased training activities. Fasting determined a significant decrease in blood glucose levels, while plasma proteins, urea, uric acid, and free fatty acids increased. Perception-reaction time and hand grip strength were unmodified during fasting. By contrast, PWC170 was significantly and progressively reduced during fasting, and this decrease was not reversed by an increase in training activities.

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