Probably during these extreme training or competition events you fill like you’re getting your value as an extreme conditioning enthusiast. This is likely very true on the short. However, extended activities in this range of intensity can deplete body recovery systems enough to intensify injury issues such as overuse injuries. Using periodization will allow for breaks to this intensity. Also, having physicals prior to engaging and reengaging the periods of the extreme conditioning will help identify possible negative effects.
Baca, Justin D and Len Kravitz, PhD. "Extreme Conditioning Programs: High-Risk or Vulnerable Risk Takers?" IDEA Fitness Journal 10.9 (2013). Database. 13 January 2014. <http://www.ideafit.com/fitness-library/extreme-conditioning-programs-high-risk-or-vulnerable-risk-takers?ACE_ACCESS=e5721b2d766a65611025b9560b0d56f4>.