Department of Kinesiology, University of Rhode Island, Kingston, Rhode Island.
Department of Kinesiology, University of Connecticut, Storrs, Connecticut.
Muscle Nerve. 2019 Nov;60(5):598-603. doi: 10.1002/mus.26650. Epub 2019 Aug 12.
Recent investigations have questioned the role of hydration and electrolytes in cramp susceptibility and thus the efficacy of consuming electrolyte-rich carbohydrate beverages (EB) to control/prevent cramping.
Nine euhydrated, cramp-prone participants had their cramp susceptibility assessed by measuring the nerve stimulation threshold frequency at which cramping occurs (TF) before and after consumption of an EB (kCal: 120, Na: 840 mg, K: 320 mg, Mg: 5 mg) and placebo beverage (PB: kCal: 5, Na: 35 mg). Cramp intensity was assessed using a verbal pain scale and poststimulation electromyography (EMG).
TF was greater in EB (14.86 ± 7.47 Hz) than PB (14.00 ± 5.03 Hz; P = .038) and reported pain was lower in EB (2.0 ± 0.6) than PB (2.7 ± 0.8; P = .025) while EMG was similar (P = .646).
EB consumption decreased cramp susceptibility and pain but did not prevent cramping in any participants. These results suggest that electrolyte consumption independent of hydration can influence cramp susceptibility in young people.
最近的研究质疑了水合作用和电解质在抽筋易感性中的作用，因此，饮用富含电解质的碳水化合物饮料（EB）来控制/预防抽筋的效果也受到了质疑。
9 名水合状态正常、易抽筋的参与者在饮用 EB（热量：120kcal，钠：840mg，钾：320mg，镁：5mg）和安慰剂饮料（PB：热量：5kcal，钠：35mg）前后，通过测量抽筋发生时的神经刺激阈值频率（TF）来评估其抽筋易感性。抽筋强度通过口头疼痛量表和刺激后肌电图（EMG）进行评估。
EB 的 TF 大于 PB（14.86±7.47Hz 比 14.00±5.03Hz；P=0.038），EB 的报告疼痛程度低于 PB（2.0±0.6 比 2.7±0.8；P=0.025），而 EMG 相似（P=0.646）。
EB 摄入降低了抽筋易感性和疼痛程度，但并未预防任何参与者抽筋。这些结果表明，电解质的摄入独立于水合作用可能会影响年轻人的抽筋易感性。
