Dr. Stacy Sims: Why Intermittent Fasting Fails for Active Women (The Science-Backed Truth).

#intermittentfasting #womenshealth #stacysims #hormonebalance #preworkoutnutrition #fitnessforwomen Is intermittent fasting actually beneficial for women, or is it secretly undermining your fitness goals? In this eye-opening discussion with Dr. Stacy Sims, we unpack why popular diet trends like intermittent fasting and fasted workouts can be highly detrimental to active females. While men often thrive on restricted feeding windows, a woman's unique biology responds differently due to higher baseline oxidative muscle fibers and specialized kisspeptin neurons in the brain. Skipping breakfast or training without proper fueling triggers a severe stress response, causing cortisol levels to skyrocket and downregulating thyroid and endocrine functions within just four days. This survival state slows down your resting metabolism and forces the body to burn precious lean muscle mass instead of fat. Watch until the end to discover the precise pre-workout and post-workout nutrition protocols for women—including the critical 45-minute protein window—to optimize hormone health, sustain cognitive function, and achieve true metabolic flexibility without sending your nervous system into an emergency state.