1. Testosterone levels rise when people compete on teams or in events with members of the opposite sex (if you are heterosexual).
There have been a number of studies looking at the effects of winning and losing on men’s testosterone levels. Recently, a research team has found that competing on co-ed recreational teams increased testosterone in both men AND women (androgens, more precisely). The greater the proportion of opposite sex players the greater the increase. The people studied were ultimate Frisbee players, which is very different sport than CrossFit. However CrossFit provides a competitive mixed sex environment. Another notable thing about the study was that testosterone increased whether the participants were on the winning team or not. So, even if you don’t have the best snatch you can still enjoy a little extra from the group experience (Miller et al. 2012).
2. Testosterone will rise when you workout or compete where you will get positive feedback.
Train with people who will tell you how to get better instead of criticizing you for what you are doing wrong. Training in a positive environment will increase testosterone and future performance. Training somewhere where emphasis on mistakes and negative criticisms are the norm will lower it and lower later performance. Sometimes for days afterwards. Effects of different post-match recovery interventions on subsequent athlete hormonal state and game performance.
3. Avoid Canned Food.
The linings of canned food contain a chemical called Bisphenol A among other things. You may know Bisphenol A as BPA and may know it has recently been banned for use in manufacture of baby bottles. BPA is an estrogen mimic and may lower testosterone production in men.
Miller SL, Maner JK, McNulty JK. 2012. Adaptive attunement to the sex of individuals at a competition: the ratio of opposite- to same-sex individuals correlates with changes in competitors’ testosterone levels. Evolution and Human Behavior. 33(1): 57-63.
Lee HJ, Chattopadhyay S, Gong EY, Ahn RS, & Lee K (2003). Antiandrogenic effects of bisphenol A and on the function of androgen receptor. Toxicological sciences : an official journal of the Society of Toxicology, 75 (1), 40-6 PMID: 12805653
Crewther BT, & Cook CJ (2012). Effects of different post-match recovery interventions on subsequent athlete hormonal state and game performance. Physiology & behavior, 106 (4), 471-5 PMID: 22465311