Does The 4-Hour Body Still Work After 40? (I’m 49)

Summary

Tim Ferriss says the core ideas in The 4-Hour Body remain useful, including for people in their 40s and beyond. He emphasizes that these are his own views and experiences.

Diet and metabolism

• Low-carb eating: Ferriss still supports it and uses it as a “reset.” He considers it a simple, practical approach to body recomposition and performance.
• Intermittent fasting: His usual approach combines low-carb eating with a fast of at least 16 hours and an eating window of about 8 hours. The fasting period runs from the end of one day’s eating to the start of the next.
• Periodic ketogenic eating: He sometimes alternates low-carb eating with a ketogenic diet, which he says helps stabilize his energy.
• Personal results: Ferriss reports that after 4–6 weeks of this approach, his glucose-tolerance and insulin-sensitivity test results changed substantially. These are his personal results, not a guarantee for others.
• PEG supplement stack: He is less certain about the evidence for policosanol in the stack and says he would want to review independent research. Otherwise, he still considers most of the book’s material relevant.
• Sustainability: He recommends choosing an eating plan that is sustainable over an ideal plan that someone will abandon.

Fitness, energy, and family life

When asked what to prioritize as a new parent with limited time and money, Ferriss highlights relationships and health and fitness.

He recommends Terry Real’s audiobook Fierce Intimacy for practical relationship guidance and also mentions Crucial Conversations.

Ferriss describes exercise as a productivity and energy multiplier. He recalls Richard Branson’s view that daily exercise can create several additional hours of focused productivity.

For relatively inexpensive, home-based exercise, he suggests:

• The Happy Body, a routine associated with Jerzy and Aniela Gregorek that uses minimal equipment, such as a mat and dumbbells.
• Gymnastic Strength Training (GST), associated with Coach Chris Sommer and based mostly on bodyweight exercises.

He also mentions acro yoga and L-basing as activities he has combined with those systems.

Ferriss says he is using Occam’s Rule from The 4-Hour Body to build muscle ahead of surgery, anticipating that recovery could involve muscle loss.

Presenters and sources mentioned

• Presenter: Tim Ferriss
• Questioner: Alice; an earlier questioner is unnamed.
• People and resources referenced: The 4-Hour Body and its Occam’s Rule; Fierce Intimacy by Terry Real; Crucial Conversations; The Happy Body by Jerzy and Aniela Gregorek; Gymnastic Strength Training and Coach Chris Sommer; acro yoga and L-basing; Chris Palmer and metabolic psychiatry; Richard Branson; Ramit Sethi; Naval Ravikant; Tools of Titans.