Key points from article :
Relative Energy Deficiency in Sport (Red-S) is a rising condition among amateur sportspeople.
Sportspeople restrict their diet in the belief that weight loss will keep improving performance.
But as a result some of the body's functions begin to shut down.
Lowers hormone levels, bone density, metabolic rate and increases mental health problems.
Affects male and female athletes and became a recognised condition in 2014.
British Athletics along with others are working to ensure awareness and treatment of Red-S.
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