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Examination of Energy Needs and Horm...

Moore, Erin.

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Examination of Energy Needs and Hormone Levels in Male Endurance Athletes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Examination of Energy Needs and Hormone Levels in Male Endurance Athletes./
作者:	Moore, Erin.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	167 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-11(E), Section: A.
Contained By:	Dissertation Abstracts International79-11A(E).
標題:	Physical education. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10752198
ISBN:	9780438112476

Examination of Energy Needs and Hormone Levels in Male Endurance Athletes.
Moore, Erin.

Examination of Energy Needs and Hormone Levels in Male Endurance Athletes. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 167 p.

Source: Dissertation Abstracts International, Volume: 79-11(E), Section: A.

Thesis (Ph.D.)--University of South Carolina, 2018.

A plethora of literature examining the physiological consequences associated deficits in energy availability (EA) for female athletes exists, however literature examining male athletes is sparse. Purpose: To determine the effects of high exercise energy expenditure (EEE) on Male Triad symptoms (EA with or without an eating disorder [ED], reproductive hormones Testosterone [T] and Luteinizing hormone [LH], and bone mineral density [BMD]) and other metabolic markers (Insulin, Leptin, Cortisol and Interleukin-6 [IL-6]) in endurance-trained male athletes. Methods: We utilized a cross-sectional design on 14 endurance trained male athletes (age: 26.4 + 4.2 yrs.; weight: 70.6 + 6.4 kg; and height: 179.5 + 4.3 cm) whom were recruited from the local community. Two separate training weeks (low [LV] and high [HV] training volumes were collected including: dietary logs, exercise logs, BMD, and blood concentrations for 6 hormones (T, LH, Insulin, Leptin, Cortisol, and IL-6). Anthropometric measurements (height, weight, and body composition) were taken prior to data collection. Results: Overall, EA presented as 27.6 + 12.1 kcals/KG/FFM with 35% (n=5) of participants presenting with increased risk for ED. Examining Male Triad components: 1) 32.1% presented with LEA (>20 kcal/kg/FFM) with or without ED, 2) Reproductive hormones T (1780.6 + 1672.6 ng/dL) and LH (813.7 + 314.2 pg/mL) were within normal limits compared to normative data, and 3) BMD was not compromised at 1.31 g/cm2. Participants at risk for LEA (< 20 kcal/KG/FFM), demonstrated 41.2% (n = 7) HV: 50%, n = 4; LV: 33.3%, n = 3) had increased T levels (p = 0.20). Of those participants with LEA, 21.7% (n = 5) (HV: 18.2%, n = 2; LV: 25%, n = 3) presented with low Leptin levels (p = 0.01). Significant regressions revealed T levels from EA (F(1,24) = 4.8, p = 0.04); RMR (F(1, 23) = 16.2, p < 0.001); EI (F(1,24) = 6.7, p = 0.02), and DXA_BFP (F(1, 24) = 51.9, p < 0.001) and leptin levels from DXA_BFP (F(1, 24) = 27.2, p < 0.001). Conclusion: This study is the first to examine all 3 components of the Male Triad. We found 1 compromised component of the Triad (LEA with or without ED risk), however both reproductive hormones (T and LH) and BMD were not compromised. Resultant LEA demonstrated a significant negative relationship with Leptin. Relationships between body fat percent and the hormones T and Leptin demonstrated clinical uses for monitoring weight to assess hormonal profiles in males. More research investigating negative physiological consequences associated with the Male Triad, decreased EI and increased EEE is need in the male population.

ISBN: 9780438112476Subjects--Topical Terms:

635343
Physical education.

Examination of Energy Needs and Hormone Levels in Male Endurance Athletes.
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