Philippians 4:13 says: I can do everything in Christ that strengthens me. Strength is something that helps us to survive daily and that motivates us to perform our daily activities, God in his word tells us: come to me those who are tired and burdened, that I will make you rest, and that is a promise.
The fatigue of the day is something that tires people, but many of God's people and children grab that as an excuse for not going to services, and that should not be so, because God promises to give us new strength, and if we go to his house to look for him even with that tiredness God will give us new strength, we will leave his house with renewed forces willing to do anything and even more willing to serve him.
Remember that the word says: strive and be brave, do not fear or faint, because Jehovah God will be with you. If God is with us we should not worry about anything, on the contrary we should rejoice and trust that God will give us the strength to endure and overcome any trial and then we will receive his blessings. If we arrive from high school tired, no matter we make an effort, because Daddy God will bless us for that, the same happens when we arrive from work or we finish any activity, if we seek God, He will bless us and give us new strength, to overcome and move along.