"Weight needs to be set beforehand, at least 15-20 days before. But, during the bouts, weight does become an issue. My weight increased by about 3.5 kg. I had to stay awake the entire night to reduce it. Towards the end, sometimes we get desperate for even a sip of water. Not just the night before the bout, we find it difficult to sleep even two days before, since we have to remain empty stomach. When you don't eat anything, how would you sleep?," Aman Sehrawat, Bronze medal winner at Paris Olympics, told NDTV.