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638 records – page 1 of 64.

A 7-day activity diary for assessment of daily energy expenditure validated by the doubly labelled water method in adolescents.

https://arctichealth.org/en/permalink/ahliterature52682
Source
Eur J Clin Nutr. 1997 Sep;51(9):585-91
Publication Type
Article
Date
Sep-1997
Author
L E Bratteby
B. Sandhagen
H. Fan
G. Samuelson
Author Affiliation
Department of Clinical Physiology, University Hospital, Uppsala, Sweden.
Source
Eur J Clin Nutr. 1997 Sep;51(9):585-91
Date
Sep-1997
Language
English
Publication Type
Article
Keywords
Activities of Daily Living
Adolescent
Basal Metabolism
Calorimetry, Indirect
Comparative Study
Deuterium - diagnostic use
Energy Metabolism
Exertion
Female
Humans
Male
Oxygen Isotopes
Research Support, Non-U.S. Gov't
Sensitivity and specificity
Sweden
Water
Abstract
OBJECTIVES: To validate the use of an activity diary and predicted BMR for assessment of daily total energy expenditure (TEE) and physical activity level (PAL = TEE/BMR) in adolescents. DESIGN: TEE and PAL estimated from activity diary records kept for seven days and BMR predicted from age, gender and body weight were compared with the results of doubly labelled water (DLW) measurements and indirect calorimetry performed during the same time period. SETTING: The Unit of paediatric Physiology of the Department of Clinical Physiology, University Hospital, Uppsala, Sweden. SUBJECTS: Fifty randomly selected 15 y old adolescents (25 boys and 25 girls). RESULTS: The mean difference between TEE estimated in all adolescents by the activity diary and by DLW methods was 1.2%. The limits of agreement (mean difference 2 s.d.) were -3.47 and 3.77 MD/d, equivalent to a coefficient of variation of 15%. The mean difference between PAL assessed by activity diary records and by DLW measurements was 0.001, and the limits of agreement between the two methods were 0.54. CONCLUSIONS: The results imply that the activity diary method provides a close estimate of TEE and PAL in population groups.
PubMed ID
9306084 View in PubMed
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The 13th Annual International Symposium in obesity: bariatric/metabolic surgery: how it influences energy balance regulation.

https://arctichealth.org/en/permalink/ahliterature131119
Source
Int J Obes (Lond). 2011 Sep;35 Suppl 3:S1-2
Publication Type
Article
Date
Sep-2011
Author
D. Richard
P. Boisvert
Author Affiliation
Merck Frosst/CIHR Research Chair in Obesity, Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculty of Medicine, Université Laval, Québec, Canada. Denis.Richard@criucpq.ulaval.ca
Source
Int J Obes (Lond). 2011 Sep;35 Suppl 3:S1-2
Date
Sep-2011
Language
English
Publication Type
Article
Keywords
Bariatric Surgery - methods - statistics & numerical data
Canada - epidemiology
Congresses as topic
Energy Metabolism
Evidence-Based Medicine
Humans
Obesity, Morbid - epidemiology - metabolism - surgery
Patient Selection
PubMed ID
21912380 View in PubMed
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A 26 year physiological description of a National Hockey League team.

https://arctichealth.org/en/permalink/ahliterature156070
Source
Appl Physiol Nutr Metab. 2008 Aug;33(4):753-60
Publication Type
Article
Date
Aug-2008
Author
H A Quinney
Randy Dewart
Alex Game
Gary Snydmiller
Darren Warburton
Gordon Bell
Author Affiliation
Faculty of Physical Education and Recreation, University of Alberta, Edmonton, AB, Canada.
Source
Appl Physiol Nutr Metab. 2008 Aug;33(4):753-60
Date
Aug-2008
Language
English
Publication Type
Article
Keywords
Adolescent
Adult
Anthropometry - methods
Body Height - physiology
Body mass index
Body Weights and Measures - methods - statistics & numerical data
Canada
Energy Metabolism - physiology
Hand Strength - physiology
Hockey - physiology - statistics & numerical data
Humans
Male
Oxygen Consumption - physiology
Physical Endurance - physiology
Physical Fitness - physiology
Skinfold thickness
Time
Young Adult
Abstract
The primary purpose of this investigation was to examine the physiological profile of a National Hockey League (NHL) team over a period of 26 years. All measurements were made at a similar time of year (pre-season) in 703 male (mean age +/- SD = 24 +/- 4 y) hockey players. The data were analyzed across years, between positions (defensemen, forwards, and goaltenders), and between what were deemed successful and non-successful years using a combination of points acquired during the season and play-off success. Most anthropometric (height, mass, and BMI) and physiological parameters (absolute and relative VO2 peak, relative peak 5 s power output, abdominal endurance, and combined grip strength) showed a gradual increase over the 26 year period. Defensemen were taller and heavier, had higher absolute VO2 peak, and had greater combined grip strength than forwards and goaltenders. Forwards were younger and had higher values for relative VO2 peak. Goaltenders were shorter, had less body mass, a higher sum of skinfolds, lower VO2 peak, and better flexibility. The overall pre-season fitness profile was not related to team success. In conclusion, this study revealed that the fitness profile for a professional NHL ice-hockey team exhibited increases in player size and anaerobic and aerobic fitness parameters over a 26 year period that differed by position. However, this evolution of physiological profile did not necessarily translate into team success in this particular NHL franchise.
PubMed ID
18641719 View in PubMed
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31P-NMR study of skeletal muscle metabolism in patients with chronic respiratory impairment.

https://arctichealth.org/en/permalink/ahliterature5321
Source
Am Rev Respir Dis. 1992 Oct;146(4):1019-24
Publication Type
Article
Date
Oct-1992
Author
T. Kutsuzawa
S. Shioya
D. Kurita
M. Haida
Y. Ohta
H. Yamabayashi
Author Affiliation
Department of Respiratory Medicine, Tokai University School of Medicine, Isehara, Japan.
Source
Am Rev Respir Dis. 1992 Oct;146(4):1019-24
Date
Oct-1992
Language
English
Publication Type
Article
Keywords
Aged
Anaerobic Threshold - physiology
Energy Metabolism - physiology
Exercise - physiology
Forearm
Glycolysis - physiology
Humans
Hydrogen-Ion Concentration
Lung Diseases, Obstructive - metabolism
Magnetic Resonance Spectroscopy - diagnostic use
Male
Middle Aged
Muscles - metabolism
Phosphates - metabolism
Phosphocreatine - metabolism
Research Support, Non-U.S. Gov't
Abstract
To evaluate the energy metabolism of peripheral skeletal muscle during exercise in patients with chronic respiratory impairment, the 31P-nuclear magnetic resonance (NMR) spectra of forearm muscle were investigated in nine patients and nine age-matched control subjects. We calculated the phosphocreatine (PCr) to PCr + inorganic phosphate (PI) ratio, the time constant of PCr recovery and the intracellular pH. The exercise consisted of repetitive hand grips against a 2-kg load every 3 s for 6 min (0.33 W). The patients showed a marked decrease in the PCr/(PCr + PI) ratio and pH in the muscle during exercise in contrast to the control subjects whose PCr/(PCr + PI) showed a minor decrease without any change in pH. The relationship between PCr utilization and pH demonstrated that anaerobic glycolysis switched on earlier in patients with chronic respiratory impairment. A split PI peak was observed in five of nine patients during exercise. The PCr/(PCr + PI) ratio during the last minute of exercise correlated significantly with the vital capacity (% predicted), with the FEV1/FVC, with the body weight, with the maximum strength of hand grip, and with the muscle mass. The results indicate impaired oxidative phosphorylation and the early activation of anaerobic glycolysis in the muscles of patients with chronic respiratory impairment. Several factors related to chronic respiratory impairment, such as disuse, malnutrition and dysoxia, would contribute to the metabolic changes observed in the muscles examined.
PubMed ID
1416390 View in PubMed
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Abnormality of energy metabolism in the skeletal muscle of patients with liver cirrhosis and changes under administration of glucose and branched-chain amino acids.

https://arctichealth.org/en/permalink/ahliterature5271
Source
Tokai J Exp Clin Med. 2004 Dec;29(4):191-8
Publication Type
Article
Date
Dec-2004
Author
Jun Doi
Koichi Shiraishi
Munetaka Haida
Shohei Matsuzaki
Author Affiliation
Department of Gastroenterology, Tokai University Hachioji Hospital, Hachioji, Tokyo 192-0032, Japan.
Source
Tokai J Exp Clin Med. 2004 Dec;29(4):191-8
Date
Dec-2004
Language
English
Publication Type
Article
Keywords
Aged
Amino Acids, Branched-Chain - administration & dosage
Case-Control Studies
Citric Acid Cycle
Comparative Study
Energy Metabolism
Exercise
Fasting
Female
Glucose - administration & dosage - metabolism
Humans
Hydrogen-Ion Concentration
Liver Cirrhosis - metabolism
Magnetic Resonance Spectroscopy
Male
Middle Aged
Muscle, Skeletal - metabolism
Oxygen - metabolism
Phosphocreatine - metabolism
Spectroscopy, Near-Infrared
Abstract
We assessed changes in skeletal muscle energy metabolism by 31P-magnetic resonance spectroscopy (31P-MRS) and oxygen supply by near-infrared spectroscopy (NIR), after exercise and after administration of glucose and a branched-chain amino acids (BCAA), in healthy volunteers and patients with liver cirrhosis. As for the patients with liver cirrhosis, 4 were classified in Child-Pugh Grade A and the other 4 in Grade B. In patients with liver cirrhosis, the intramuscular pH and PCr index (PCr/PCr + Pi) were lower than in healthy subjects after exercise in the fasting state; the deltapH and deltaPCr index were statistically siginificant (p
PubMed ID
15717491 View in PubMed
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Accelerated recovery of ischemic canine myocardium induced by AMP. Preliminary report.

https://arctichealth.org/en/permalink/ahliterature55698
Source
Adv Myocardiol. 1985;6:483-90
Publication Type
Article
Date
1985
Author
H M Sami
J R Koke
N. Bittar
Source
Adv Myocardiol. 1985;6:483-90
Date
1985
Language
English
Publication Type
Article
Keywords
Adenosine Diphosphate - metabolism
Adenosine Monophosphate - metabolism - pharmacology
Adenosine Triphosphate - metabolism
Animals
Coronary Disease - drug therapy
Creatine - metabolism
Dogs
Energy Metabolism - drug effects
Female
Male
Myocardial Contraction - drug effects
Nitroprusside - pharmacology
Phosphocreatine - metabolism
Abstract
Experiments were conducted on 18 dogs using an in situ blood-perfused canine heart model. Intracoronary infusion of AMP resulted in increased ATP and total adenine nucleotide levels. On reperfusion following a 15-min period of ischemia, ATP and total adenine nucleotide levels were significantly higher than control. Most important, contractile function recovered more rapidly in the AMP-treated dogs. It is therefore concluded that the delayed functional recovery noted after periods of ischemia is likely to be a direct result of delayed ATP resynthesis.
PubMed ID
3992046 View in PubMed
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The Actiheart in adolescents: a doubly labelled water validation.

https://arctichealth.org/en/permalink/ahliterature118532
Source
Pediatr Exerc Sci. 2012 Nov;24(4):589-602
Publication Type
Article
Date
Nov-2012
Author
Nerissa Campbell
Harry Prapavessis
Casey Gray
Erin McGowan
Elaine Rush
Ralph Maddison
Author Affiliation
School of Kinesiology, The University of Western Ontario, London, Ontario, Canada.
Source
Pediatr Exerc Sci. 2012 Nov;24(4):589-602
Date
Nov-2012
Language
English
Publication Type
Article
Keywords
Adolescent
Adult
Anthropometry
Body Composition
Body mass index
Child
Cohort Studies
Energy Metabolism - physiology
Exercise Test - instrumentation - methods
Female
Heart Rate - physiology
Humans
Linear Models
Male
Monitoring, Physiologic - instrumentation
Motor Activity - physiology
Ontario
Water - diagnostic use
Abstract
This study investigated the validity of the Actiheart device for estimating free-living physical activity energy expenditure (PAEE) in adolescents.
Total energy expenditure (TEE) was measured in eighteen Canadian adolescents, aged 15-18 years, by DLW. Physical activity energy expenditure was calculated as 0.9 X TEE minus resting energy expenditure, assuming 10% for the thermic effect of feeding. Participants wore the chest mounted Actiheart device which records simultaneously minute-by-minute acceleration (ACC) and heart rate (HR). Using both children and adult branched equation modeling, derived from laboratory-based activity, PAEE was estimated from the ACC and HR data. Linear regression analyses examined the association between PAEE derived from the Actiheart and DLW method where DLW PAEE served as the dependent variable. Measurement of agreement between the two methods was analyzed using the Bland-Altman procedure.
A nonsignificant association was found between the children derived Actiheart and DLW PAEE values (R = .23, R(2) = .05, p = .36); whereas a significant association was found between the adult derived Actiheart and DLW PAEE values (R = .53, R(2) = .29, p
PubMed ID
23196766 View in PubMed
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Active living among older Canadians: a time-use perspective over 3 decades.

https://arctichealth.org/en/permalink/ahliterature116266
Source
J Aging Phys Act. 2014 Jan;22(1):103-13
Publication Type
Article
Date
Jan-2014
Author
Jamie E L Spinney
Hugh Millward
Author Affiliation
Dept. of Geography, Saint Mary's University, Halifax, NS, Canada.
Source
J Aging Phys Act. 2014 Jan;22(1):103-13
Date
Jan-2014
Language
English
Publication Type
Article
Keywords
Activities of Daily Living
Aged
Aged, 80 and over
Aging - physiology - psychology
Canada - epidemiology
Demography
Energy Metabolism
Female
Health Behavior
Humans
Independent Living - statistics & numerical data
Leisure Activities
Male
Motor Activity
Physical Exertion
Prevalence
Seasons
Socioeconomic Factors
Time Factors
Abstract
This research uses four nationally representative samples of time diary data, spanning almost 30 yr, that are fused with energy expenditure information to enumerate the median daily duration of moderate or vigorous effort activity, quantify the prevalence of Canadians age 65 yr and older who are meeting recommended daily levels of physical activity, and explore the factors affecting rates of active living. Results indicate that 41.1% of older Canadians met recommended levels of physical activity in 1992, 40.6% in 1998, 43.5% in 2005, and 39.6% in 2010. Both rates of active living and daily duration of aerobic activity exhibit significant differences among sociodemographic groups, with age, sex, activity limitation, urban-rural, and season exhibiting the most significant influences. This study illustrates the potential for time diary data to provide detailed surveillance of physical activity patterns, active aging research, and program development, as well.
PubMed ID
23416414 View in PubMed
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Activity budgets and activity rhythms in red ruffed lemurs (Varecia rubra) on the Masoala Peninsula, Madagascar: seasonality and reproductive energetics.

https://arctichealth.org/en/permalink/ahliterature95795
Source
Am J Primatol. 2005 May;66(1):23-44
Publication Type
Article
Date
May-2005
Author
Vasey Natalie
Author Affiliation
Department of Anthropology, Portland State University, Portland, Oregon 97207-0751, USA. nvasey@pdx.edu
Source
Am J Primatol. 2005 May;66(1):23-44
Date
May-2005
Language
English
Publication Type
Article
Keywords
Activity Cycles - physiology
Animals
Ecosystem
Energy Metabolism - physiology
Feeding Behavior - physiology
Lemuridae - physiology
Madagascar
Motor Activity - physiology
Observation
Reproduction - physiology
Seasons
Sex Factors
Abstract
The activity budgets and daily activity rhythms of Varecia rubra were examined over an annual cycle according to season and reproductive stage. Given the relatively high reproductive costs and patchy food resources of this species, I predicted that V. rubra would 1) travel less and feed more during seasonal resource scarcity in an attempt to maintain energy balance, and 2) show sex differences in activity budgets due to differing reproductive investment. Contrary to the first prediction, V. rubra does not increase feeding time during seasonal food scarcity; rather, females feed for a consistent amount of time in every season, whereas males feed most during the resource-rich, hot dry season. The results are consistent with other predictions: V. rubra travels less in the resource-scarce cold rainy season, and there are some pronounced sex differences, with females feeding more and resting less than males in every season and in every reproductive stage except gestation. However, there are also some provocative similarities between the sexes when activity budgets are examined by reproductive stage. During gestation, female and male activity budgets do not differ and appear geared toward energy accumulation: both sexes feed and rest extensively and travel least during this stage. During lactation, activity budgets are geared toward high energy expenditure: both sexes travel most and in equal measure, and rest least, although it remains the case that females feed more and rest less than males. These similarities between female and male activity budgets appear related to cooperative infant care. The high energetic costs of reproduction in V. rubra females may require that they allot more time to feeding year round, and that their overall activity budget be more directly responsive to seasonal climate change, seasonal food distribution, and reproductive schedules.
Notes
Erratum In: Am J Primatol. 2005 Aug;66(4):393-4
PubMed ID
15898071 View in PubMed
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Activity pattern and energy expenditure due to physical activity before and during pregnancy in healthy Swedish women.

https://arctichealth.org/en/permalink/ahliterature63107
Source
Br J Nutr. 2006 Feb;95(2):296-302
Publication Type
Article
Date
Feb-2006
Author
Marie Lof
Elisabet Forsum
Author Affiliation
Division of Nutrition, Department of Biomedicine and Surgery, University of Linkoping, SE-58185 Linkoping, Sweden.
Source
Br J Nutr. 2006 Feb;95(2):296-302
Date
Feb-2006
Language
English
Publication Type
Article
Keywords
Adult
Body Composition - physiology
Body mass index
Body Weight - physiology
Energy Metabolism - physiology
Exertion - physiology
Female
Heart Rate - physiology
Humans
Pregnancy - physiology
Pregnancy Trimester, First
Pregnancy Trimester, Third
Questionnaires
Research Support, Non-U.S. Gov't
Running - physiology
Sleep - physiology
Sweden
Walking - physiology
Abstract
Human pregnancy is associated with increased requirements for dietary energy and this increase may be partly offset by reductions in physical activity during gestation. Studies in well-nourished women have shown that the physical activity level (PAL), obtained as the total energy expenditure (TEE) divided by the BMR, decreases in late pregnancy. However, it is not known if this decrease is really caused by reductions in physical activity or if it is the result of decreases in energy expenditure/BMR (the so-called metabolic equivalent, MET) for many activities in late pregnancy. In the present study activity pattern, TEE and BMR were assessed in twenty-three healthy Swedish women before pregnancy as well as in gestational weeks 14 and 32. Activity pattern was assessed using a questionnaire and heart rate recording. TEE was assessed using the doubly labelled water method and BMR was measured by means of indirect calorimetry. When compared to the pre-pregnant value, there was little change in the PAL in gestational week 14 but it was significantly reduced in gestational week 32. Results obtained by means of the questionnaire and by heart rate recording showed that the activity pattern was largely unaffected by pregnancy. The findings support the following conclusion: in a population of well-nourished women where the activity pattern is maintained during pregnancy, the increase in BMR represents approximately the main part of the pregnancy-induced increase in TEE, at least until gestational week 32.
PubMed ID
16469145 View in PubMed
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638 records – page 1 of 64.