Seshomoru said:
Basically, ice is for after a proper cool down, and the only real benefit is that it feels good. It's not helping or hurting anything. If your arm hurts after you've thrown, there is something wrong, and ice isn't going to heal it.
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Ice reduces the blood flow, and that reduces inflammation. If you can reduce the inflammation, then that can help the tissues heal more quickly. And when I say heal, I'm talking about microtrauma to the tissues. What happens when you don't ice, is that microtrauma remains and takes longer to heal, and if you go back out there 5 days later and throw again, you will have some microtrauma from the last outing, and it adds up over the season until you have to shut it down.
Also, if you throw a baseball at mod-max effort 200 times, including actual game pitches, warm-ups between innings and a bullpen session before the game (talking about a starting pitcher that has thrown 120 pitches in this instance), you probably will at the very least have some soreness and swelling. The key is to look for warning signs such as weakness, stiffness or prolonged pain.
You are correct that ice won't heal anything by itself, but it does help control the inflammation process and promote the healing process. We're trying to prevent injuries, and that's what our staff is not doing to the extent that they should, assuming the rumors are true.</p>