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- W2169892364 endingPage "68" @default.
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- W2169892364 abstract "PURPOSE: Energy balance (EB) is traditionally assessed in 24-hour time periods. Because of inconsistent findings associating EB with menstrual dysfunction (MD), there may be a benefit to analyzing EB at smaller intervals to better address real-time physiologic response. It is possible that women who are in daily EB could still experience MD if the majority of the day is spent in energy deficit (i.e., a catabolic state), as may occur with delayed eating. The purpose of this study, therefore, was to assess if within-day energy balance (WDEB) factors were associated with MD in active adult females. METHODS: Using an IRB-approved protocol, 20 active females self-monitored hourly energy intake and expenditure (predicted using a relative-intensity activity scale) over a 3-day period. A survey was used to obtain information on training type and duration, health, and menstrual status. WDEB was assessed using NutriTiming software, providing data on time spent in an energy surplus and deficit, the largest energy surplus and deficit, and ending energy balance. The 3-day average of these values was correlated with menstrual status to determine statistical associations. RESULTS: Participants spent more hours in a catabolic state (EB less than zero) than in an anabolic state (20.5 hrs vs 3.5 hrs) and had an average daily energy deficit of -504 kcal. Nine subjects (45%) had loss of menses for greater than 3 months (LoM>3mos), indicative of amenorrhea. Hours spent in energy surplus >400 kcal was inversely correlated with LoM>3mos (r = -0.463; p = 0.04). The impact of miles run per week and MD, based on a quartile stratification of miles run, were analyzed using an ANOVA with Tamhane non-parametric post hoc test. Significant differences were found between the upper two quartiles of distance run per week and LoM>3mos (p = 0.048). There was no relationship between end-of-day EB and LoM>3mos. CONCLUSIONS: Researchers and healthcare professionals could consider assessing WDEB because it may provide a better understanding of menstrual dysfunction causation than the more traditional end-of-day energy balance assessment. Doing so may enhance intervention strategies for improving menstrual health in active women." @default.
- W2169892364 created "2016-06-24" @default.
- W2169892364 creator A5029468379 @default.
- W2169892364 creator A5046979905 @default.
- W2169892364 date "2011-05-01" @default.
- W2169892364 modified "2023-09-26" @default.
- W2169892364 title "The Relationship Between Within-Day Energy Balance and Menstruation in Active Females" @default.
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