For this is the love of God, that we keep his commandments. And his commandments are not burdensome. (1 John 5:3 ESV)
Christ invites everyone who is weighted down with man-made religion and human futility to come to Him. He will give him a burden that is manageable and rest for his soul. No more stooped posture and 300 lb. backpacks.
Your call, and mine, is to wait on the Lord. He gives the grace and strength we need each day. It's not that we'll never be physically tired or stressed. What will be noticeably absent is the overwhelming feeling of "I can't do one more thing! I just want to crawl up into a fetal position and pull the covers over my head."
When the Son sets us free, we are free indeed. We will not grow weary. We will not drop over dead. We will experience a renewal of strength for today's tasks and pain. This is something I need to remember.