If man has no freedom of movement in Reformed theology, then it is very close to strong determinism with the apparent exception that it does not consider the mind, soul and spirit to be an illusion even though it would agree that none of those can cause anything to happen.
It's exactly determinism. God's determinism. And I trust God completely, so where's the problem?
Of course we all feel as if every breath we take is our own doing. But that pretense is just part of the mystery that is our life on earth.
Because that is not the truth. The truth is that "in Him we live, and move, and have our being."
As xzins said, it is an amazing "comfort" to know that this life is all contained within the mind of God, for His glory, and the welfare of His family among which I am numbered, although I have done NOTHING to deserve such a gift.
It's all Him.