The Lord said to St. Paul "My grace is sufficient for you, for power is made perfect in weakness."
So rather than complain strenuously, I'll bear with this particular human weakness until it passes. And trust that even though I am physically weak, I can be strong in God. Strong in trust that He will renew my strength eventually so that I can do my work in the time and way that is best.
I also remember that some of my brothers and sisters live in continual physical weakness and frustration. Let my prayer today be for them. They are an example to the rest of us that God's power exists most especially in those who seem to be weak but trust in Him.