Investigating The Impact Of Covid-19 On Perceived Stress Levels Of Division II Student-athletes

Abstract

Ketogenic contest preparation has become more prevalent in the bodybuilding community. However, few studies have explored the effect of minor nutrient fluctuations on daily blood and breath ketone values during prolonged in-season dieting. PURPOSE: To evaluate acute relationships between diet and ketone levels in a competitive bodybuilder. METHODS: We tracked an IFBB professional female bodybuilder for 75 consecutive days of ketogenic contest preparation. Independent variables were daily kcals consumed, proportions of fat, protein, and carbohydrate, amounts of sodium and potassium, total fluid volume, and coffee intake. We also estimated daily caloric expenditure using a FitBit Charge 3 activity tracker. Dependent variables were blood ketones measured with a Keto-Mojo device and breath ketones measured with a Ketonix Professional Breath Ketone Analyzer. We collected a fasted test each morning and repeated testing at night. Linear regressions evaluated relationships between independent and dependent variables. The prior day's behaviors served as predictors for fasted ketones; the same day's behaviors were used to predict nighttime values.