Is diet soda bad? Do muscles vanish when you stop lifting? Dr. Michael Israetel, bodybuilding professor and fitness expert, answers these questions and more!

What We Discuss with Michael Israetel:

• Common beliefs about artificial sweeteners and diet sodas being inherently harmful are largely unfounded. According to Dr. Israetel, there's no scientific evidence supporting that diet sodas are bad for health when examining both empirical literature and mechanistic studies.
• Muscle dysmorphia in men is a real issue, though not as prevalent as body image issues in women. It can lead to unhealthy obsessions with appearance and potentially dangerous behaviors, especially when combined with social media pressure and unrealistic comparisons.
• "Muscle memory" is a real physiological phenomenon based on satellite cell nuclei that remain in muscle tissue even after losing muscle mass. These nuclei never leave once created, making it easier to regain lost muscle even years later.
• You can't outrun a poor diet with exercise — the body is extremely efficient at conserving energy, making it much harder to burn off excess calories through exercise than it is to simply not consume them in the first place.
• The key to sustainable fitness is implementing "cleanup phases" rather than extreme dieting. You can maintain a healthy weight by following normal, balanced eating habits most of the time, then doing 3-4 week periods of stricter eating when needed to reset. This approach allows you to enjoy life while staying fit, rather than constantly restricting yourself.
• And much more...

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