sore from first real workout... how long does it last?

Okay... so i started the P90 (not the X yet) program last night!

During the first video, everything was easy to follow and felt good! 

Today however, I am so sore!!!  Its a good hurt, .... and cant wait to do the second video tonight!

I have never been committed to working out till now... how long will the soreness/stiffness last?

it will usually last a couple of days.  If it is just muscle soreness, be sure to continue your workouts.  it will help get rid of the lactic acid (what makes muscles sore) quicker.  Also, hot bathes and massages help as well.

A hot shower promotes the lactic acid to stay in your muscles, and unless you want to remain sore for a longperiod of time, don't do warm showers, baths, or jacuzzi afterwards. Immediately following your workout take a very cold shower or ice bath. This constricts the blood vessels... thus trapping the lactic acid in them, not allowing anymore to flow into the vessel. once the body warms back to temperature, the old blood containing lactic acid in your muscles will be flushed out by a new supply of fresh blood, free of most lactic acid. This is why many pro athletes ice bath after a game or intense workout. The soreness gets better with time, but as you stated, it's a good hurt...

lactic acid? never heard of that! The hot shower def. felt great this morning!!!

R u from AL? I saw Dr. Freeman did your WLS and hes in my area!

It should take a few days to get all the soreness out. But like Sandy said, keep up the workouts as long as you are not in dire pain.

http://sportsmedicine.about.com/od/sampleworkouts/a/Ice-Bath .htm

Information seems to be inconclusive.  Some of the tests show improvement, so don't.  Some show improvements for different types of exercise sprint type activities vs. endurance type activities.

I actually watched a recent youtube video from the Ironman in Hawaii where they were using inflatable lower body suits similar to the stockings they put on you after surgery.  They would then pressurize and depressurize them in an effort to recover post workout.
Compression gear has also gained a large following because of similar effects.

Lactic Acid:
http://sportsmedicine.about.com/cs/exercisephysiology/a/aa05 3101a.htm