Why energize meditation drift sleep sabotage inertia?

My usual pre- morning routine is to begin a vibrant, active meditation that will energize my digestive system and within a few minutes I am asleep. It is not ordinary fatigue, but a definite sudden shutdown. My system seems not to want to think about accelerating or altering its sleepy position. This resistance is subconscious and strong. My body appears to like physical inertia of sleep over physical effort of change, which effectively sabotages the practice even before it starts. Name: Pooja Mehta DOB: 22nd July 1996 Time: 10:10 AM Location: Surat