So I found a study that states that angiogenesis is inhibited by consuming tocotrienols.
Angiogenesis is the formation of new blood vessels sprouting from old ones. Endurance training is supposed to bring about angiogenesis I think, so would this not be a bad thing?
Here's the article off pubmed: Anti-angiogenic function of tocotrienol. [Asia Pac J Clin Nutr. 2008] - PubMed Result