Traditionally, the Female Athlete Triad has focused on - you guessed it - females. In 2005 the International Olympic Committee (IOC) wrote a consensus statement and position stand on the Female Athlete Triad. In late 2014, IOC made some significant modifications to these documents. In fact, the phenomenon is no longer called or considered a triad and it does not affect just women.
The once Female Athlete Triad is now called Relative Energy Deficiency in Sport (RED-S). This condition is now considered a syndrome due to decreased energy availability which can be brought on by a decrease in food intake, increased exercise load, or both. This shift in energy availability wrecks havoc on the body by disrupting the individuals hormonal, metabolic, and functional characteristics. It can negatively affect any combination of our immune system, bone health, metabolic rate, protein synthesis, cardiovascular and psychological health, and menstrual cycle in various magnitudes. This is quite a change from the original prerequisites of decreased energy availability, amenorrhea, and decreased bone density. These changes acknowledge that males can in fact suffer from the syndrome known as RED-S.
The research on how this condition affects men is small and more studies are needed to determine its prevalence in various sporting communities. So far studies have shown that elite male cyclists and male athletes in gravitational and weight class sports have a high prevalence of disordered eating (18-50%), predisposing them to decreased energy availability.
As mentioned earlier, treatment of such a condition is complex and should be performed by a team of health professionals. Early intervention is best, as the toll of these radical bodily changes can do some serious damage to both your health and sport performance.