Fat Burning Is Not Fat Loss: Dr. Abbie Smith-Ryan on Muscle, Fat Loss and Fasted Training for Women 40+
High Performance HealthShow Notes
Dr. Abbie Smith-Ryan explains how muscle quality changes in perimenopause and how HIIT, heavy lifting and protein timing help women over 40 train smarter.
In perimenopause, muscle can shift from a lean "filet" toward a "rib eye," with more fat and connective tissue inside it, and a DEXA or InBody can't detect it. Dr. Abbie Smith-Ryan explains why heavier, higher power training recruits the type 2 fibers that fade with age, how 1 minute on, 1 minute off HIIT appears to reduce visceral fat in as little as three weeks, why fat burning is not fat loss, and when about 20g of protein before training helps.
WHAT YOU'LL LEARN
Why muscle quality, not just muscle size, may change first in perimenopause
How 1 minute on, 1 minute off HIIT targets visceral fat in midlife women
Why fat burning during zone 2 is not the same as fat loss
When training fasted costs you results, and when it does not
TIMESTAMPS
00:00 - Intro: Muscle Quality in Perimenopause and Why a DEXA Can't Measure It
06:31 - How to Train for Muscle Quality After 40: Heavy Load, Power and Type 2 Fibers
10:13 - HIIT and Visceral Fat in Midlife Women: The 1 Minute On, 1 Minute Off Protocol
16:01 - The 30 Minute Heavy Lifting Protocol, the Norwegian 4x4 and Where Zone 2 Fits
25:38 - Fasted vs Fed Training for Women 40+: Protein Before or After Exercise
37:58 - Losing Leg and Glute Definition, HRT and Why Your Symptoms Are Valid
44:28 - Fiber, Omega-3s and Creatine Dosing for Muscle and Brain in Perimenopause
54:05 - Perimenopause Is a Metabolic Transition: Final Advice
VALUABLE RESOURCES
Effects of high-intensity interval training on cardiometabolic risk factors in overweight/obese women, Journal of Sports Sciences (Smith-Ryan et al. (2016)) https://doi.org/10.1080/02640414.2016.1149609
The acute effect of exercise modality and nutrition manipulations on post-exercise resting energy expenditure and respiratory exchange ratio in women, Sports Medicine (Wingfield et al. (2015)) https://doi.org/10.1186/s40798-015-0010-3
The effects of nutrient timing on training adaptations in resistance-trained females, Journal of Science and Medicine in Sport (Pihoker et al. (2018)) https://doi.org/10.1016/j.jsams.2018.09.236
Metabolic effects of high-intensity interval training and essential amino acids, European Journal of Applied Physiology (Hirsch et al. (2021)) https://doi.org/10.1007/s00421-021-04792-4
Follow Dr Abbie on Instagram: https://www.instagram.com/asmithryan/
Explore Dr Abbie's work: https://asmithryan.com/
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ABOUT THE GUEST
Dr Abbie Smith-Ryan is an exercise physiologist and researcher in the Department of Exercise and Sport Science at the University of North Carolina at Chapel Hill, where she leads the Applied Physiology Laboratory. Her research focuses on how high-intensity training, nutrient timing and supplementation such as creatine shape muscle quality, body composition and metabolic health in women, with a growing focus on perimenopause.
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This episode is brought to you by Solaray
If you’re a woman in midlife and short on time, HIIT may be one of the most efficient ways to improve metabolic fitness and target visceral fat. In this conversation, Dr. Abbie Smith-Ryan breaks down the exact HIIT protocol her research group uses most often: one minute hard, one minute recovery, repeated for up to 10 rounds.