Within-day energy deficiency and reproductive function in female endurance athletes
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Within-day energy deficiency and reproductive function in female endurance athletes. / Fahrenholtz, Ida Lysdahl; Sjödin, Anders Mikael; Benardot, Dan ; Tornberg, Åsa; Skouby, Sven O.; Faber, Jens; Sundgot-Borgen, Jorunn; Melin, Anna Katarina.
I: Scandinavian Journal of Medicine & Science in Sports, Bind 28, Nr. 3, 2018, s. 1139-1146.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Within-day energy deficiency and reproductive function in female endurance athletes
AU - Fahrenholtz, Ida Lysdahl
AU - Sjödin, Anders Mikael
AU - Benardot, Dan
AU - Tornberg, Åsa
AU - Skouby, Sven O.
AU - Faber, Jens
AU - Sundgot-Borgen, Jorunn
AU - Melin, Anna Katarina
N1 - CURIS 2018 NEXS 052
PY - 2018
Y1 - 2018
N2 - We aimed to estimate and compare within-day energy balance (WDEB) in athletes with eumenorrhea and menstrual dysfunction (MD) with similar 24-hour energy availability/energy balance (EA/EB). Furthermore, to investigate whether within-day energy deficiency is associated with resting metabolic rate (RMR), body-composition, S-cortisol, estradiol, T3, and fasting blood glucose. We reanalyzed 7-day dietary intake and energy expenditure data in 25 elite endurance athletes with eumenorrhea (n=10) and MD (n=15) from a group of 45 subjects where those with disordered eating behaviors (n=11), MD not related to low EA (n=5), and low dietary record validity (n=4) had been excluded. Besides gynecological examination and disordered eatingevaluation, the protocol included RMR-measurement; assessment of body-composition by dualenergy X-ray absorptiometry, blood plasma analysis, and calculation of WDEB in 1-hour intervals. Subjects with MD spent more hours in a catabolic state compared to eumenorrheic athletes; WDEB <0 kcal: 23.0 hour (20.8–23.4) vs 21.1 hour (4.7–22.3), P=0.048; WDEB <-300 kcal: 21.8 hour (17.8–22.4) vs 17.6 hour (3.9–20.9), P=0.043, although similar 24-hour EA: 35.6 (11.6) vs 41.3 (12.7) kcal/kg FFM/day, (P=0.269), and EB: -659 (551) vs -313 (596) kcal/day, (P=0.160). Hours with WDEB <0 kcal and <-300 kcal were inversely associated with RMRratio (r=-0.487, P=0.013, r=-0.472, P=0.018), and estradiol (r=-0.433, P=0.034, r=-0.516, P=0.009), and positively associated with cortisol (r=0.442, P=0.027, r=0.463, P=0.019). In conclusion, although similar 24-hour EA/EB, the reanalysis revealed that MD athletes spent more time in a catabolic state compared to eumenorrheic athletes. Within-day energy deficiency was associated with clinical markers of metabolic disturbances.
AB - We aimed to estimate and compare within-day energy balance (WDEB) in athletes with eumenorrhea and menstrual dysfunction (MD) with similar 24-hour energy availability/energy balance (EA/EB). Furthermore, to investigate whether within-day energy deficiency is associated with resting metabolic rate (RMR), body-composition, S-cortisol, estradiol, T3, and fasting blood glucose. We reanalyzed 7-day dietary intake and energy expenditure data in 25 elite endurance athletes with eumenorrhea (n=10) and MD (n=15) from a group of 45 subjects where those with disordered eating behaviors (n=11), MD not related to low EA (n=5), and low dietary record validity (n=4) had been excluded. Besides gynecological examination and disordered eatingevaluation, the protocol included RMR-measurement; assessment of body-composition by dualenergy X-ray absorptiometry, blood plasma analysis, and calculation of WDEB in 1-hour intervals. Subjects with MD spent more hours in a catabolic state compared to eumenorrheic athletes; WDEB <0 kcal: 23.0 hour (20.8–23.4) vs 21.1 hour (4.7–22.3), P=0.048; WDEB <-300 kcal: 21.8 hour (17.8–22.4) vs 17.6 hour (3.9–20.9), P=0.043, although similar 24-hour EA: 35.6 (11.6) vs 41.3 (12.7) kcal/kg FFM/day, (P=0.269), and EB: -659 (551) vs -313 (596) kcal/day, (P=0.160). Hours with WDEB <0 kcal and <-300 kcal were inversely associated with RMRratio (r=-0.487, P=0.013, r=-0.472, P=0.018), and estradiol (r=-0.433, P=0.034, r=-0.516, P=0.009), and positively associated with cortisol (r=0.442, P=0.027, r=0.463, P=0.019). In conclusion, although similar 24-hour EA/EB, the reanalysis revealed that MD athletes spent more time in a catabolic state compared to eumenorrheic athletes. Within-day energy deficiency was associated with clinical markers of metabolic disturbances.
KW - Faculty of Science
KW - Energy availability
KW - Within-day energy balance
KW - Relative energy deficiency
KW - Amenorrhea
KW - Catabolism
KW - RMR
KW - Resting metabolic rate
U2 - 10.1111/sms.13030
DO - 10.1111/sms.13030
M3 - Journal article
C2 - 29205517
VL - 28
SP - 1139
EP - 1146
JO - Scandinavian Journal of Medicine & Science in Sports
JF - Scandinavian Journal of Medicine & Science in Sports
SN - 0905-7188
IS - 3
ER -
ID: 186453436