4P Fitness Insights
Explore practical, science-backed insights on strength, mobility, nutrition, recovery, longevity, and today’s biggest fitness trends. Use the category filters or search bar below to quickly find the guidance, answers, and topics that matter most to you.
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Build, Maintain, Defend: A Smarter Way to Think About Strength for Life
Your fitness goals shouldn’t stay the same forever. The Build, Maintain, Defend framework explains how the job of fitness changes across life, from building strength, muscle, bone, and movement early to protecting physical capacity through midlife and defending strength, mobility, and independence as you grow older.

