Lykken G I, Lukaski H C, Bolonchuk W W, Sandstead H H
J Lab Clin Med. 1983 Apr;101(4):651-8.
Vigorous exercise has been reported to increase the apparent potassium content of athletes measured by whole body gamma ray scintillation counting of 40K. The possibility that this phenomenon is an artifact was evaluated in three cyclists and one nonathlete after exercise on the road (cyclists) or in a room with a source of radon and radon progeny (nonathlete). The apparent 40K content of the thighs of the athletes and whole body of the nonathlete increased after exercise. Counts were also increased in both windows detecting 214Bi, a progeny of radon. 40K and 214Bi counts were highly correlated (r = 0.87, p less than 0.001). The apparent increase in 40K was accounted for by an increase in counts associated with the 1.764 MeV gamma ray emissions from 214Bi. Thus a failure to correct for radon progeny would cause a significant error in the estimate of lean body mass by 40K counting.
据报道，通过对40K进行全身伽马射线闪烁计数测量，剧烈运动可增加运动员的表观钾含量。在三名骑自行车的人和一名非运动员在户外骑行（骑自行车的人）或在有氡及其子体源的房间内运动（非运动员）后，评估了这种现象是人为现象的可能性。运动后，运动员大腿的表观40K含量和非运动员的全身表观40K含量均增加。检测氡子体214Bi的两个窗口的计数也增加了。40K和214Bi的计数高度相关（r = 0.87，p < 0.001）。40K的表观增加是由与214Bi的1.764 MeV伽马射线发射相关的计数增加所致。因此，未对氡子体进行校正会导致通过40K计数估算瘦体重时出现重大误差。
