CKD Linked to Greater Neuromuscular Fatigability

MONDAY, Dec. 19, 2022 (HealthDay News) -- Chronic kidney disease (CKD) is associated with greater neuromuscular fatigability, which increases with fatigue severity, according to a study published online Dec. 9 in Medicine & Science in Sports & Exercise.
Antoine Chatrenet, Ph.D., from Le Mans Université in France, and colleagues examined the etiology of neuromuscular fatigability in a study involving 45 CKD patients and 57 controls. Two questionnaires were used to assess fatigue. During explosive contractions, the peak rate of force development (RFDpeak, normalized: NRFDpeak) and rate of electromyography rise (RER) were measured. During maximum voluntary contractions, peak force and mean surface electromyography were measured.
The researchers found that the main impact of CKD was on the Mental and the Reduced Motivation subscales of fatigue. CKD was associated with greater neuromuscular fatigability measured using NRFDpeak, which increased with the severity of fatigue and with a higher rate of RER decrease compared with controls. An association was seen between the Reduced Motivation subscale and the RER in these patients. Peak force fatigability, but not RFDpeak, contributed to fatigue variance.
"The association between neuromuscular fatigability and self-reported fatigue suggests that exercise interventions such as adapted physical activity might mitigate fatigue and improve quality of life in CKD patients," the authors write.
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