Using lots of energy too close to bedtime could mean that we go to bed on an empty stomach. This could cause our sleep to be affected and lead us to have vivid nightmares as a result of low blood sugars. Now while we aren’t saying that those late-night snacks are a great idea which help you to lose weight and sleep well, it is certainly food for thought! It is certainly not advisable to go to bed hungry as this will inevitably keep you awake. Equally, exercising too close to bedtime is thought to interfere with your sleep patterns.