Browsing University of Waterloo by Subject "body composition"
Now showing items 1-15 of 15
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Association of strength, power, and physical performance with muscle mass and composition in older males: a comparison of muscle thickness, echo intensity, and lean tissue mass
(Canadian Science Publishing, 2022-05)Dual-energy X-ray absorptiometry (DXA) appendicular lean tissue is used to screen older adults for sarcopenia. However, emerging data indicates that ageing-related muscle atrophy largely occurs within specific muscles, ... -
Bioelectrical Impedance Analysis Overestimates Fat-Free Mass in Breast Cancer Patients Undergoing Treatment
(Wiley, 2020-12)Background: Bioelectrical impedance analysis (BIA) is commonly used to assess fat-free mass (FFM) and fat mass (FM) in breast cancer patients. However, because of the prevalence of overweight, obesity and variable hydration ... -
Body size normalization of ultrasound measured anterior upper leg muscle thickness in younger and older males and females
(Nature Publishing Group, 2022-01)BACKGROUND: Ultrasound measurements of the anterior upper leg muscle thickness are often used to quantify muscle mass; however, the ideal normalization approach is unclear. Our primary objective was to examine how the ... -
Clinical assessment of body composition after spinal cord injury. An observational study.
(University of Waterloo, 2009-11-19)Background: Persons who sustain a spinal cord injury (SCI) experience a dramatic loss of muscle and bone, and a dramatic increase in adipose tissue. It has been suggested that the muscle atrophy, obesity, and sublesional ... -
Clinically Practical Approach for Screening of Low Muscularity Using Electronic Linear Measures on Computed Tomography Images in Critically Ill Patients
(Wiley, 2018-07-12)Background: Computed tomography (CT) scans performed during routine hospital care offer the opportunity to quantify skeletal muscle and predict mortality and morbidity in intensive care unit (ICU) patients. Existing methods ... -
Comparing occupational musculoskeletal exposures during common materials handling tasks between non-obese and obese adults
(University of Waterloo, 2017-12-08)Higher body mass is associated with increased risk of musculoskeletal injury, a greater number of insurance claims, and higher direct and indirect costs due to decreased productivity during manual materials handling. Over ... -
Development of a bedside-applicable ultrasound protocol to estimate fat mass index derived from whole body dual-energy x-ray absorptiometry scans
(Elsevier, 2019-01)Objectives: Precise measures of adiposity are difficult to obtain in clinical settings due to a lack of access to accurate and reliable techniques. The aim of this study was to develop and internally validate a bedside-applicable ... -
Development of a viable bedside ultrasound protocol to accurately predict appendicular lean tissue mass
(University of Waterloo, 2016-09-27)Background: Quantifying lean tissue or muscle mass in aging and clinical populations is of increasing importance due to emerging associations between low muscle mass and poor physical function, as well as increased rates ... -
The effects of body composition and body configuration on impact dynamics during lateral falls: insights from in-vivo, in-vitro, and in-silico approaches
(University of Waterloo, 2017-10-24)Fall-related injuries are the current leading accidental cause of emergency room and hospital visits, hospitalizations, and injury-related deaths in Ontario. Hip fractures in particular are associated with poor functional ... -
Evaluation of glucose metabolism in breast cancer patients following a combined aerobic and resistance exercise intervention
(University of Waterloo, 2015-09-30)BACKGROUND: Breast cancer patients typically present with impaired glucose metabolism at diagnosis. Given that increased fat mass and decreased lean mass develop throughout the treatment trajectory and into survivorship, ... -
Impairments in glucose and lipid metabolism in breast cancer patients
(University of Waterloo, 2013-01-08)BACKGROUND: Breast cancer patients typically present with unhealthy body composition (high fat mass and low muscularity) near diagnosis. These body composition characteristics often worsen during treatment and ultimately ... -
Influence of subcutaneous adipose tissue and skeletal muscle thickness on rectus femurs echo intensity in younger and older males and females
(Wiley, 2022-09)Objectives—Ultrasound measurements of muscle echo intensity are commonly used surrogates of muscle composition (eg, intramuscular adipose tissue). However, given that soundwaves are increasingly attenuated with tissue ... -
Rectus abdominis muscle thickness is a valid measure of cross-sectional area: implications for ultrasound
(Elsevier, 2022-03)Rationale and objectives: The rectus abdominis muscle exhibits early and significant muscle atrophy, which has largely been characterized using ultrasound measured muscle thickness. However, the validity of rectus abdominis ... -
Site-specific skeletal muscle echo intensity and thickness differences in subcutaneous adipose tissue matched older and younger adults
(Wiley, 2021-03)Background: Age-related deterioration of muscle mass does not occur uniformly across the body. However, there is limited knowledge on the uniformity of age-related muscle composition changes across the body. Objective: ... -
Ultrasound image resolution influences analysis of skeletal muscle composition
(Wiley, 2020-06-03)Introduction: Analysis of muscle composition using ultrasound requires standardization of several equipment settings (i.e. gain). However, the influence of image resolution, which is altered by imaging depth, on measures ...