That's the question I ask in a new article for Running Times that can be found here:
In the article I go over how ice baths, anti-inflamatory drugs, antioxidants, and carbohydrate supplementation during runs could potentially limit training adaptation. Hopefully it makes you think a little bit about what you do. I'm not saying get rid of the above things but that you have to use them at the right time. In particular antioxidants is a particularly intriguing topic because it's a classic demonstration of the overemphasize new discovery/theory.
Many of you probably saw the talk about the Nike Cryosauna that was used by Dathan Ritzenhein in preperation for the NYC marathon. While on the surface it looks ridiculous, one of the thing that is intriguing is that it possibly enhances recovery without inhibiting the training adaptations like a traditional ice bath. The research is still early but it's been shown to decrease creatine kinase (a marker for muscle damage) levels and given the fact that the cold only goes skin deep, it's quite possible that this doesn't halt the signalling pathways like an ice bath which goes much deeper does. More research needs to be done, but it is intriguing.
Lastly, Niell Elvin sent some high speed video of Ritz, Meb, and a couple others running the NYC marathon at mile 19. Keep in mind that this is mile 19, well into the fatigue state, so mechanics can get pretty messy. Hopefully I can get some analysis up sometime when I get time.
Meb and Ritz:
Kipkosgei, Dos Santos, and Kirui: