CYP19A1, ESR1, SHBG, DIO2, and COMT variants all influence the perimenopausal and menopausal transition differently. Next Level provides the training and nutrition framework that responds to the hormonal shifts these variants shape.
The companion to ROAR focused specifically on perimenopause and menopause — providing a physiology-based guide to training, nutrition, and hormone changes for active women navigating this life stage. One of the few books in this space grounded in actual exercise physiology research on menopausal athletes.
One of the few evidence-grounded books on training and nutrition specifically for perimenopausal and menopausal athletes.
These peer-reviewed studies connect to the core ideas in this book. Each result has been scored for reliability.
Volek and Phinney are the leading researchers on fat adaptation in athletes. Essential reading for PPARA GG individuals — this genotype is associated with stronger fat-burning efficiency during aerobic effort, making the research in this book directly applicable.
The science of human endurance — what actually limits performance and how athletes push those limits. Covers VO2max, lactate threshold, heat adaptation, and psychological factors. Directly relevant to the ACTN3 XX endurance genotype and aerobic performance research.
Sports psychology meets physiology. Covers the mental architecture of athletic performance — how to train the brain alongside the body. Particularly relevant for COMT ValVal athletes who perform differently under competition pressure versus low-stakes training.