Weight fluctuation for each participant [mean (SD) 80.2 (4.2)
years; male 60.0%, n = 10] over 3 days ranged from 1.1% to 3.6%. Over
3 days, 40.0% (4/10) of participants had weight fluctuations of >2% and
20% (2/10) had weight fluctuations of >3%. Time of weigh-in accounted
for 99.8% of the variation in weight fluctuation (P < 0.05), with the lowest
fluctuations observed when weights were compared at the same time each
day (0.4 kg).