Abstract
Human beings are exposed to heavy metals through various ways in daily life. However, the effect of heavy metal mixtures on muscle strength in children and adolescents remains unclear. We aimed to investigate the relationship of exposure to heavy metal mixtures (barium, cadmium, cobalt, manganese, molybdenum, lead, antimony, strontium, tin, thallium, tungsten, uranium, and cesium) with muscle strength in children and adolescents. A total of 1357 (boys, 50.8%) participants aged between 8 and 17 were extracted from the National Health and Nutrition Examination Surveys 2011–2014. Urine metals were measured by inductively coupled plasma-mass spectrometry. Muscle strength was measured through a grip test using a handgrip dynamometer. Weighted quantile sum regression was performed to estimate the mixture effect of urinary metals on muscle strength. After adjusting for potential confounders, comparing participants in the highest versus lowest quartiles of cobalt, molybdenum, lead, antimony, strontium, thallium, and cesium, the handgrip strength decreased by − 4.48 kg (95% CI: − 6.93, − 2.03), − 6.13 kg (− 8.76, − 3.51), − 2.26 kg (− 4.22, − 0.30), − 2.38 kg (− 4.68, − 0.08), − 2.29 kg (− 4.45, − 0.13), − 4.78 kg (− 7.13, − 2.44), and − 5.68 kg (− 9.20, − 2.17), respectively. Furthermore, exposure to a mixture of metals were also significantly associated with decreased muscle strength (β: − 2.62 kg; 95% CI: − 3.71, − 1.54). Findings from the present study suggest that higher heavy metal exposure and the exposure levels of a mixture of metals in urine are inversely related to handgrip strength, implying that children’s grip strength is not entirely explained by energy intake or lack of exercise, but may be related to environmental pollutants.
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Original data can be found in the official website (https://www.cdc.gov/nchs/nhanes/index.htm).
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M.W.: conceptualization, methodology, data curation, and writing—original draft. Y.S.: conceptualization and writing—original draft. Y.W.: data curation and writing—reviewing and editing.
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Wu, M., Shu, Y. & Wang, Y. Exposure to mixture of heavy metals and muscle strength in children and adolescents: a population-based study. Environ Sci Pollut Res 29, 60269–60277 (2022). https://doi.org/10.1007/s11356-022-19916-2
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DOI: https://doi.org/10.1007/s11356-022-19916-2