scholarly journals Examining the Interaction of Force and Repetition on Musculoskeletal Disorder Risk

2012 ◽  
Vol 55 (1) ◽  
pp. 108-124 ◽  
Author(s):  
Sean Gallagher ◽  
John R. Heberger
Keyword(s):  
Fatigue Failure ◽  
Musculoskeletal Disorder ◽  
Failure Process ◽  
Epidemiological Studies ◽  
Laboratory Studies ◽  
Musculoskeletal Tissues ◽  
Relationship Of ◽  
The Relationship ◽  
Risk Fatigue ◽  
Increases In Risk

Objective: Our aims were (a) to perform a systematic literature review of epidemiological studies that examined the interaction of force and repetition with respect to musculoskeletal disorder (MSD) risk, (b) to assess the relationship of force and repetition in fatigue failure studies of musculoskeletal tissues, and (c) to synthesize these findings. Background: Many epidemiological studies have examined the effects of force and repetition on MSD risk; however, relatively few have examined the interaction between these risk factors. Method: In a literature search, we identified 12 studies that allowed evaluation of a force-repetition interaction with respect to MSD risk. Identified studies were subjected to a methodological quality assessment and critical review. We evaluated laboratory studies of fatigue failure to examine tissue failure responses to force and repetition. Results: Of the 12 epidemiological studies that tested a Force × Repetition interaction, 10 reported evidence of interaction. Based on these results, the suggestion is made that force and repetition may be interdependent in terms of their influence on MSD risk. Fatigue failure studies of musculoskeletal tissues show a pattern of failure that mirrors the MSD risk observed in epidemiological studies. Conclusions: Evidence suggests that there may be interdependence between force and repetition with respect to MSD risk. Repetition seems to result in modest increases in risk for low-force tasks but rapid increases in risk for high-force tasks. This interaction may be representative of a fatigue failure process in affected tissues.

Relationship of stalk morphology and chemical composition to lodging resistance in maize (Zea mays L.) in a rainforest zone

1985 ◽  
Vol 104 (2) ◽  
pp. 429-433 ◽  
Author(s):  
H. A. Esechie
Keyword(s):  
Chemical Composition ◽  
Zea Mays L ◽  
Morphological Characters ◽  
Laboratory Studies ◽  
Lodging Resistance ◽  
Basal Section ◽  
Basal Internode ◽  
Relationship Of ◽  
The Relationship ◽  
Rainforest Zone

SummaryField and laboratory studies were carried out in 1981 and 1982 to investigate the relationship of stalk morphology and chemical composition to lodging resistance in maize in the rainforest zone of Nigeria.Morphological characters correlated with lodging were plant height, diameter and length of basal internode, thickness of rind and weight of 5 cm basal section. Lodging was negatively correlated with grain yield, and with the percentages of total nonstructural carbohydrate, protein and potassium in the stalks. Premature stalk senescence and rot were common in varieties susceptible to lodging. Lodging had no relationship with leaf area and number of days from sowing to flowering.

The relationship of Zonocerus variegatus (L.) (Acridoidea: Pyrgomorphidae) with cassava (Manihot esculenta)

1977 ◽  
Vol 67 (3) ◽  
pp. 391-404 ◽  
Author(s):  
E. A. Bernays ◽  
R. F. Chapman ◽  
E. M. Leather ◽  
A. R. McCaffery ◽  
W. W. D. Modder
Keyword(s):  
Hydrogen Cyanide ◽  
Manihot Esculenta ◽  
Normal Growth ◽  
The Other ◽  
Zonocerus Variegatus ◽  
Laboratory Studies ◽  
Low Levels ◽  
Relationship Of ◽  
The Relationship ◽  
Ibadan Nigeria

AbstractField and laboratory studies at Ibadan, Nigeria, showed that the young nymphs of Zonocerus variegatus (L.) normally reject cassava after biting it and die if they are confined on growing leaves. Later instars will eat cassava, especially when deprived of food for some time, but the adults progressively lose weight when restricted to feeding on growing cassava. On cut cassava, on the other hand, extensive feeding occurs and normal growth is maintained. The change from unpalatability to acceptability occurs within about an hour of cutting and is apparently associated with wilting. Cassava produces latex, but this was not distasteful to Zonocerus. The readiness to feed on growing cassava was associated with low levels of hydrogen cyanide production by the leaves; wilted leaves still produced hydrogen cyanide, but at a lower rate than turgid, growing leaves. In the area around Ibadan, Zonocerus regularly defoliates cassava in the latter part of the dry season, probably because a shortage of attractive foods forces the insect to eat cassava.

Nutrition for the Japanese Elderly

1992 ◽  
Vol 8 (2-3) ◽  
pp. 165-175 ◽  
Author(s):  
H. Shibata ◽  
H. Nagai ◽  
H. Haga ◽  
S. Yasumura ◽  
T. Suzuki ◽  
...  
Keyword(s):  
Fats And Oils ◽  
Epidemiological Studies ◽  
Nutrient Intakes ◽  
Total Proteins ◽  
Okinawa Prefecture ◽  
Dietary Records ◽  
Japanese Elderly ◽  
Akita Prefecture ◽  
Relationship Of ◽  
The Relationship

The present paper examines the relationship of nutritional status to further life expectancy and health status in the Japanese elderly based on 3 epidemiological studies. Nutrient intakes in 94 Japanese centenarians investigated between 1972 and 1973 showed a higher proportion of animal protein to total proteins than in contemporary average Japanese. High intakes of milk and fats and oils had favorable effects on 10-year (1976–1986) survivorship in 422 urban residents aged 69–71. The survivors revealed a longitudinal increase in intakes of animal foods such as eggs, milk, fish and meat over the 10 years. Nutrient intakes were compared, based on 24-hour dietary records, between a sample from Okinawa Prefecture where life expectancies at birth and 65 were the longest in Japan, and a sample from Akita Prefecture where the life expectancies were much shorter. Intakes of Ca, Fe, vitamins A, B1, B2, C, and the proportion of energy from proteins and fats were significantly higher in the former than in the latter. Intakes of carbohydrates and NaCl were lower.

scholarly journals A comparison of methods of measuring the persistence of neutralizing and haemagglutinin-inhibiting antibodies to louping ill virus in experimentally infected sheep

1968 ◽  
Vol 66 (2) ◽  
pp. 217-227 ◽  
Author(s):  
K. J. O'Reilly ◽  
C. E. Gordon Smith ◽  
D. A. McMahon ◽  
E. T. W. Bowen ◽  
G. White
Keyword(s):  
Epidemiological Studies ◽  
Infected Sheep ◽  
Comparison Of Methods ◽  
Louping Ill ◽  
Antibody Levels ◽  
Relationship Of ◽  
The Relationship

Sheep, after infection with louping ill virus and after re-infection with the same strain of virus 19–21 months later, were bled at intervals and their sera examined for neutralizing and haemagglutinin-inhibiting antibodies. Each antibody type was measured by the constant serum/variable virus and constant virus/variable serum methods. The persistence of each type of antibody and its significance in epidemiological studies is discussed. The relationship of antibody levels in ewes and their lambs was also examined.

scholarly journals Sleep Apnoea Adverse Effects on Cancer: True, False, or Too Many Confounders?

2020 ◽  
Vol 21 (22) ◽  
pp. 8779
Author(s):  
David Gozal ◽  
Isaac Almendros ◽  
Amanda I. Phipps ◽  
Francisco Campos-Rodriguez ◽  
Miguel A. Martínez-García ◽  
...  
Keyword(s):  
Cancer Progression ◽  
Experimental Studies ◽  
Epidemiological Studies ◽  
Sleep Apnoea ◽  
Epidemiological Evidence ◽  
Obstructive Sleep ◽  
Cancer Types ◽  
Relationship Of ◽  
Risk Of Cancer ◽  
The Relationship

Obstructive sleep apnoea (OSA) is a prevalent disorder associated with increased cardiovascular, metabolic and neurocognitive morbidity. Recently, an increasing number of basic, clinical and epidemiological reports have suggested that OSA may also increase the risk of cancer, and adversely impact cancer progression and outcomes. This hypothesis is convincingly supported by biological evidence linking certain solid tumours and hypoxia, as well as by experimental studies involving cell and animal models testing the effects of intermittent hypoxia and sleep fragmentation that characterize OSA. However, the clinical and epidemiological studies do not conclusively confirm that OSA adversely affects cancer, even if they hold true for specific cancers such as melanoma. It is likely that the inconclusive studies reflect that they were not specifically designed to test the hypothesis or because of the heterogeneity of the relationship of OSA with different cancer types or even sub-types. This review critically focusses on the extant basic, clinical, and epidemiological evidence while formulating proposed directions on how the field may move forward.

scholarly journals An Unusual Occurrence of Multiple Sclerosis in a Small Rural Community

1976 ◽  
Vol 3 (3) ◽  
pp. 163-166 ◽  
Author(s):  
Thomas John Murray
Keyword(s):  
Multiple Sclerosis ◽  
Age Of Onset ◽  
Late Onset ◽  
Epidemiological Studies ◽  
Farming Community ◽  
Unpasteurized Milk ◽  
Close Proximity ◽  
Unusual Occurrence ◽  
Relationship Of ◽  
The Relationship

SUMMARY:Ten patients with multiple sclerosis were found to have lived in close proximity in a Nova Scotia farming community of 150 people. All had drunk unpasteurized milk as children, were teetotallers, ate a high animal fat diet, and were well educated. Of greater interest was the observation that six of the ten cases were related in two family groups.The only time all patients lived in the community at the same time was in 1951 and 1952 during a polio outbreak. The relationship of polio to multiple sclerosis bears further study.The average age of the patients when they had measles was 11.8 years. Evidence suggests a link between risk of multiple sclerosis and both late onset of measles and pubertal age. Late onset of measles may be important in this cluster. Further epidemiological studies are needed to examine the age of onset of measles in M.S. cases.

scholarly journals Shoulder Risk Assessment Based on Fatigue Failure Theory

2019 ◽  
Vol 63 (1) ◽  
pp. 1117-1121
Author(s):  
Dania Bani Hani ◽  
Sean Gallagher ◽  
Richard F. Sesek ◽  
Rong Huangfu ◽  
Mark C. Schall ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Fatigue Failure ◽  
Animal Studies ◽  
Failure Process ◽  
Epidemiological Studies ◽  
Cumulative Damage ◽  
Assessment Model ◽  
Failure Theory ◽  
Epidemiological Database

Recent studies support the notion that a fatigue failure process may be responsible for the development of MSDs, including epidemiological studies, animal studies, and in vitro testing of musculoskeletal tissues. This study presents a new risk assessment model for the shoulder, which estimates the daily dose of the cumulative damage (CD) for the shoulder and allows the CD for multiple tasks to be summed to get an overall estimate for the daily cumulative damage. Videotapes of jobs from an existing epidemiological study from a large U.S. automotive manufacturer were analyzed to get exposure information required for the model. The model was then validated using outcomes from the epidemiological database. Logistic regression was used to assess the associations between Log CD and various shoulder outcomes. Results indicated that the cumulative damage for the shoulder was highly associated with all shoulder outcomes and that application of the fatigue failure methods also works extremely well in assessing the probability of association with shoulder outcomes. These results provide further support regarding the role of the fatigue failure process in the development of MSDs.

The Relationship of Coping Style to Dysphoria, Anxiety, and Anger

1998 ◽  
Vol 83 (3) ◽  
pp. 783-791 ◽  
Author(s):  
Sherry L. Whatley ◽  
April C. Foreman ◽  
Steven Richards
Keyword(s):  
Social Support ◽  
Coping Style ◽  
Depression Scale ◽  
Epidemiological Studies ◽  
Trait Anger ◽  
Ways Of Coping ◽  
Course Grades ◽  
The Social ◽  
Relationship Of ◽  
The Relationship

This study examines Problem-focused Coping and Emotion-focused Coping, as measured by the Revised Ways of Coping Checklist, in relation to Dysphoria, Anxiety, Anger, Social Support, and course grades in psychology. Women university students ( N = 245) were assessed two times six weeks apart. Problem-focused Coping was significantly negatively correlated with scores on the Center for Epidemiological Studies–Depression scale and with scores on the Self-rating Anxiety Scale at both time periods. Emotion-focused Coping was significantly positively correlated with scores on these scales and with scores on the State-Trait Anger scale at both times. Emotion-focused Coping was significantly negatively correlated with scores on the Social Support Questionnaire at both times and significantly negatively correlated with grades.

Nutrition and longevity

2002 ◽  
Vol 12 (2) ◽  
pp. 97-107 ◽  
Author(s):  
Hiroshi Shibata ◽  
Shu Kumagai
Keyword(s):  
Nutrient Intake ◽  
Epidemiological Studies ◽  
Food Items ◽  
Wide Variability ◽  
Influence Of Food ◽  
Poor Individual ◽  
Relationship Of ◽  
The Relationship ◽  
Specific Food ◽  
Overall Mortality

Until recently, there has been relatively little scientific research investigating the influence of food or nutrient intake on longevity. This is partly due to the fact that most investigators have been interested in the relationship of food or nutrient intake to specific diseases i.e. communicable diseases, coronary heart disease and cancer of specific sites, rather than to overall mortality or longevity. Another significant factor is the difficulty of comparing the nutritional intake of populations, owing to the wide variability in individual intake and poor individual recall of specific food items in epidemiological studies.

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