Only thing I would do differently than Ecko, would be that I would hit a light workout (or two) to get your body back into it after a full month off. After that, I would use his method. Otherwise, don't stress it, as Ecko mentioned, the strength will return quickly.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano