Why does cardio stop working for fat loss after 40? Also, what types of exercise best protect strength and independence as you age?

In this episode, I break down why the goal of exercise after 40 is no longer burning calories, but building muscle, strength, and power. I explain how aging biology, muscle loss, and metabolic adaptation make endless cardio ineffective for women in midlife. I also share the science, the research, and the practical strategy to help you train smarter so you can preserve independence, energy, and longevity.

What you’ll learn:

(03:17 ) How excessive cardio can stall fat loss by triggering metabolic compensation.

(04:01 ) What research shows about energy expenditure plateaus with endurance exercise.

(05:33 ) Why muscle loss—not fat gain—is the biggest risk factor after 40.

(06:18 ) How fast-twitch muscle fibers decline with age and why power training matters.

(09:51 ) The importance of Non-Exercise Activity Thermogenesis (NEAT) and why you must track your daily movement to prevent metabolic compensation.

(14:32 ) Why high-intensity interval training improves your longevity and power.

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Full show notes (including all links mentioned): https://jjvirgin.com/buildingmuscle

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