A group of taekwondo athletes were divided into three groups:
a) trained not + magnesium 10mg / kg body weight
b) Taekwondo 90-120min per day + 10mg magnesium / kg body weight
c) Taekwondo 90-120min per day without supplements of magnesium
Both total and free testosterone increased quantity, also in the group that trained taekwondo in the four weeks the experiment was done. The researchers concluded that supplements of magnesium increases free and total testosterone levels in both active and inactive players, with the highest levels were found in the active athletes.
Despite the fact that neither body weight, body composition, energy intake, or blood samples of magnesium status, there are interesting findings. This is perhaps first and foremost that we know that lack of magnesium can restrict performance capability - in addition to the lack of magnesium is relatively common, both in terms of population as a whole but also for athletes who need to think about weight.
That said, it is also important to emphasize that if you consume enough magnesium, you will not have any additive effect of adding more magnesium body. This is also in line with a ten year old meta-study by Newhouse (Clin J Sport with 2000) which concluded
Most evidence indicates no effect of Mg supplementation Wed performance (strength, Anaerobic and aerobic-lactacid)
Reference:
1. Alan Aragon Research Review, June 2010
2. Effects of magnesium supplementation Wed testosterone levels of athletes and sedentary subjects that arrest and after exhaustion. Cinar V, et al. Biol Res race items. 2010
3. Nielsen FH, Lukaski HC. Update on the relationship Between Magnesium and exercise. Magnes Res. Sept 2006.
4. Newhouse IJ, Finstad EW. The effects of magnesium supplementation Wed exercise performance. Clin J Sport With 2000 July