Examining the effects of pre-competition rapid weight loss on hydration status and competition performance in elite judo athletes.

The prevalence of rapid weight loss (RWL) among martial arts athletes including judo is very high. Many applied RWL strategies could be dangerous to health and even lead to death. Therefore, the International Judo Federation (IJF) introduced changes in the weigh-in rules, changing the official weigh-in for the day before the competition.

The Effect of Vitamin D Supplementation on Physical Capacity among Active College-Aged Males.

Vitamin D supplementation can affect strength and power; however, the effect on both aerobic and anaerobic performance remains unclear. Here, we investigate the effects of eight weeks of a high dose of vitamin D supplementation and its impact on circulating 25-hydroxyvitamin D (25-OH-D) concentrations and selected indicators of physical capacity. Subjects ( = 28, age 21.