Wait on the Lord for renewed Strength.

He gives power to the faint,
and strengthens the powerless.
Even youths will faint and be weary,
and the young will fall exhuasted;
but those who wait for the Lord
shall renew their strength,
they shall mount up with wings like eagles,
they shall run and not be weary,
they shall walk and not faint.
- Isaiah 40:29-31