This is why. That feeling that you are feeling right now. That sluggishness, sleepiness, laziness, resistance. You are doing this because of that. Doing this gets you moving and reminds you that you are alive. Doing this is hard. But you do the hard things because they are hard. Because part of you wants you to stay home, stay in bed, stay where you are. You are fighting that person. Every day is a battle, a struggle, and momentum carries you forward. The struggle will not get easier, it will not subside.
The struggle is a part of life. So get up and get after it.