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Bioimpedance analysis and HIV-related fatigue
1Yancey County Health Department, Burnsville, NC, USA.
Insights
This study found no link between body composition and fatigue in people with HIV. However, participants showed signs of nutritional compromise and reduced cell integrity, suggesting further research into HIV fatigue causes is needed.
Area of Science:
- Biomedical science
- Human physiology
- HIV research
Background:
- Fatigue is a common and debilitating symptom in people living with HIV, but its causes are not fully understood.
- Bioimpedance analysis (BIA) is a non-invasive tool for assessing body composition and cellular health.
Purpose of the Study:
- To investigate the association between body composition, measured by BIA, and fatigue intensity in individuals with HIV.
- To explore potential differences in body composition and fatigue between individuals taking protease inhibitors and those not.
Main Methods:
- A pilot study measured height, weight, and BIA parameters in 40 HIV-positive individuals (29 men, 11 women).
- Correlations were analyzed between fatigue intensity and various body composition metrics (weight, BMI, body cell mass, fat-free mass, extracellular mass, phase angle).
- Comparisons were made for body composition and fatigue between protease inhibitor users and non-users.
Main Results:
- No significant association was found between fatigue intensity and any of the measured body composition parameters.
- There were no significant differences in body composition or fatigue intensity between participants taking or not taking protease inhibitors.
- Participants exhibited below-normal phase angle and extracellular mass:body cell mass ratios, suggesting nutritional compromise and impaired cell membrane integrity.
Conclusions:
- Body composition, as assessed by BIA, does not appear to be directly related to fatigue in this cohort of HIV-positive individuals.
- Despite the lack of association with body composition, the observed indicators of nutritional and cellular compromise warrant further investigation.
- Additional research is crucial to identify the underlying physiological and psychological factors contributing to fatigue in people living with HIV, given its significant impact.
Abstract:
Although various physiological and psychological causes of fatigue in HIV-positive persons have been proposed, it is still not well understood. Bioimpedance analysis has proved to be an easily used, non-invasive measurement of body composition and cellular integrity. This study, looking at whether body composition as measured by bioimpedance analysis is associated with fatigue, is part of a pilot study looking for physiological and psychological biomarkers that could be factors in the fatigue experienced by HIV-positive people. Twenty-nine men and eleven women were measured for height, weight, and bioimpedance analysis. Correlations were examined between fatigue intensity and weight, body mass index, body cell mass, fat-free mass, extracellular mass, and phase angle. Because of the fat redistribution that has occurred with some people taking protease inhibitors, we also examined differences in weight, body mass index, body cell mass, fat-free mass, and fatigue intensity between those taking and those not taking protease inhibitors. There was no association between fatigue intensity and weight, body mass index, body cell mass, fat-free mass, or phase angle, nor were there differences between those taking and those not taking protease inhibitors. However, it was noted that both the phase angle and the ratio of extracellular mass to body cell mass (extracellular mass:body cell mass) were below their respective normal ranges, indicating that the participants were somewhat compromised nutritionally and with regard to cell membrane integrity. Although fatigue was not shown to be related to body composition measurement in this study, further work is needed on the causes of fatigue, because its effects on the lives of HIV-positive people can be devastating.
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