CSN CSN Weight Management & Body Composition 2

Question 1

Which of the following statements about BMI is most accurate when applied to athletes?

Accepted Answer

BMI can overestimate body fat in muscular athletes because it does not distinguish fat mass from lean mass

Answer

BMI is a height-weight ratio that cannot differentiate fat mass from muscle mass, making it an inaccurate body composition indicator for athletes with high lean mass.

Question 2

What is the primary hormonal mechanism through which chronic low energy availability suppresses female reproductive function?

Accepted Answer

Decreased GnRH pulse frequency suppressing LH and FSH, leading to hypothalamic amenorrhea

Answer

Low energy availability reduces GnRH pulsatility, suppressing LH and FSH secretion and leading to hypothalamic amenorrhea and estrogen deficiency.

Question 3

During a weight-loss phase, which dietary approach best protects against muscle loss in resistance-trained athletes?

Accepted Answer

High protein intake (2.3–3.1 g/kg lean body mass/day) with maintained resistance training volume

Answer

Protein intakes of 2.3–3.1 g/kg LBM/day during energy restriction, alongside continued resistance training, are most effective at preventing lean mass loss.

Question 4

What does the term 'set point theory' suggest about long-term body weight regulation?

Accepted Answer

The body actively defends a biologically preferred weight range through metabolic and hormonal adjustments

Answer

Set point theory proposes that the body uses neuroendocrine feedback (e.g., leptin, ghrelin, metabolic rate changes) to defend a preferred weight range, making sustained weight loss physiologically challenging.

Question 5

Which biomarker, when chronically suppressed, is most indicative of low energy availability in a female athlete?

Accepted Answer

Suppressed triiodothyronine (T3)

Answer

Chronically suppressed T3 is a sensitive early marker of low energy availability, reflecting the body's downregulation of thyroid function to conserve energy.

CSN - Certified Sports Nutritionist Practice Test

CSN - Certified Sports Nutritionist Practice Test

CSN CSN Weight Management & Body Composition 2