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Dahai Yu, Ying Chen, Tao Chen, Yamei Cai, Rui Qin, Zhixin Jiang, and Zhanzheng Zhao

Moderate For walking during your leisure time Walking For heavy physical activity in your leisure time Vigorous For moderate physical activity in your leisure time Moderate Abbreviation: IPAQ, International Physical Activity Questionnaire. Measure of Kidney Function Glomerular filtration rate is a measure

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Sonsoles Hernández-Sánchez, Pedro L. Valenzuela, Javier S. Morales, Juan J. Carrero, Alejandro Lucia, and Jonatan R. Ruiz

, glomerular filtration rate; LDH, lactate dehydrogenase; MCH, mean corpuscular hemoglobin; MCHC, mean corpuscular hemoglobin concentration; MCV, mean corpuscular volume; RBC, red blood cells. Note: Data are presented as absolute values. GFR was calculated with the Chronic Kidney Disease Epidemiology

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Sungchul Lee, Sangyoon Lee, Seongryu Bae, Kazuhiro Harada, Songee Jung, Keitaro Makino, and Hiroyuki Shimada

glomerular filtration rate (eGFR) in patients with Stage 3 and 4 CKD ( Eidemak et al., 1997 ). Furthermore, there is increasing recognition that the low level of physical activity levels in patients with CKD may be a problem, and emerging data demonstrate that these patients, regardless of age, function at

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Julio Cezar Q. Machado, Caroline M.O. Volpe, Leonardo S. Vasconcellos, and José A. Nogueira-Machado

cycling athletes and compare it to that of physically active individuals, correlating it with the usual renal biomarkers, creatinine, urea, and the glomerular filtration rate (GFR), at 48 hours after training, at rest. Methods The ethics committee of the Santa Casa Hospital of Belo Horizonte, Brazil

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Jacques R. Poortmans and Olivier Dellalieux

Excess protein and amino acid intake have been recognized as hazardous potential implications for kidney function, leading to progressive impairment of this organ. It has been suggested in the literature, without clear evidence, that high protein intake by athletes has no harmful consequences on renal function. This study investigated body-builders (BB) and other well-trained athletes (OA) with high and medium protein intake, respectively, in order to shed light on this issue. The athletes underwent a 7-day nutrition record analysis as well as blood sample and urine collection to determine the potential renal consequences of a high protein intake. The data revealed that despite higher plasma concentration of uric acid and calcium. Group BB had renal clearances of creatinine, urea, and albumin that were within the normal range. The nitrogen balance for both groups became positive when daily protein intake exceeded 1.26 g · kg−1 but there were no correlations between protein intake and creatinine clearance, albumin excretion rate, and calcium excretion rate. To conclude, it appears that protein intake under 2.8 g·kg−1 does not impair renal function in well-trained athletes as indicated by the measures of renal function used in this study.

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Marquis Hawkins, Anne B. Newman, Magdalena Madero, Kushang V. Patel, Michael G. Shlipak, Jennifer Cooper, Kirsten L. Johansen, Sankar D. Navaneethan, Ronald I. Shorr, Eleanor M. Simonsick, and Linda F Fried

Background:

Physical activity (PA) may play a role in preserving kidney health. The purpose of this study was to determine if PA and sedentary behavior are associated with incident chronic kidney disease (CKD) and change in kidney function in older adults.

Methods:

The Health, Aging, and Body Composition study is a prospective cohort of 3075 well-functioning older adults. PA and television watching was measured by self-report, and serum cystatin C was used to estimate glomerular filtration rate (eGFR). CKD was defined as an eGFR <60 ml/min/1.73m2. Rapid kidney function decline was defined as an annual loss in eGFR of >3ml/min/1.73m2. Discrete survival analysis was used to determine if baseline PA and television watching were related to 10-year cumulative incidence of CKD and rapid decline in kidney function.

Results:

Individuals who reported watching television >3 hours/day had a higher risk of incident CKD (HR 1.34; 95% CI, 1.09-1.65) and experiencing a rapid decline in kidney function (HR 1.26; 95% CI, 1.05-1.52) compared with individuals who watched television <2 hours/day. PA was not related to either outcome.

Conclusions:

High levels of television watching are associated with declining kidney function; the mechanisms that underlie this association need further study.

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Tessa Portlock, Natalie A. Hunt, Jason L. Zaremski, Asim Merchant, and Patricia M. Tripp

kidney injury (AKI) occurs when the kidneys rapidly lose the ability to regulate the fluid and electrolyte balance as well as fail to excrete wastes. 4 In this condition, the glomerular filtration rate significantly decreases, causing wastes to build up in the tubules and disrupt the body’s filtration

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Jieling Chen, Emily Joy Nicklett, Yaping He, and Vivian W.Q. Lou

). Complete cystatin C and physical activity measures were available for 3,684 participants. An estimated glomerular filtration rate was calculated using the CKD-Epidemiology Collaboration cystatin C equation ( Inker et al., 2012 ). Sixty-two participants aged 44 years or younger and four participants with an

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Yasuhiko Kubota, Alvaro Alonso, Amil M. Shah, Lin Y. Chen, and Aaron R. Folsom

graduation, high school with graduation, vocational school, college with or without graduation, or graduate or professional school), alcohol drinking status (current, former, or never), height (in centimeters), estimated glomerular filtration rate (in milliliters per minute), electrocardiogram (ECG

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Renata Valle Pedroso, Miguel Adriano Sanchez-Lastra, Laura Iglesias Comesaña, and Carlos Ayán

(Figure  1 ). These outcomes included estimated glomerular filtration rate (eGFR), systolic blood pressure (SBP), diastolic blood pressure (DBP), body mass index (BMI), cardiorespiratory (VO 2 max and 6-min walking test), muscular fitness (handgrip), and QoL (Kidney Disease Quality of Life Instrument