Hereâs some disgusting math: during spinning today I lost 1.7 kg. Along with the 1.5 liters of water consumed, this means Iâve sweat around 3.2 kg. Extrapolating that to a 24 hour period yields 46 kg. That is very close to the weight of Mel C (= best Melanie) during her ana period.nnIn conclusion, due to this ghastly weather I perspirate approximately one Spice Girl a day.