Dr. Abbie Smith-Ryan: The HIIT Workout Shown to Reduce Visceral Fat in Women

If you’re a woman in midlife and short on time, HIIT may be one of the most efficient ways to improve metabolic fitness and target visceral fat. In this conversation, Dr. Abbie Smith-Ryan breaks down the exact HIIT protocol her research group uses most often: one minute hard, one minute recovery, repeated for up to 10 rounds.

KEY TAKEAWAYS

The 1:1 HIIT Protocol — One minute hard followed by one minute recovery is the base model Dr. Smith-Ryan frequently uses in research.

Visceral Fat Can Respond Quickly — HIIT has been associated with reductions in visceral fat in as little as three weeks in women with higher levels to begin with.

You Don’t Need Long Workouts — Even five intervals can still provide benefit when time is tight.

Keep HIIT and Strength Distinct — Combining both into one muddled circuit can compromise the quality of each training stimulus.

Do Your Priority First — If strength is the goal, lift first; if cardiovascular adaptation is the priority, do HIIT first.

Heavy Resistance Can Be Time-Efficient — Dr. Abbie describes a 30-minute protocol using 6–8 rep loads and short rest periods.

The Norwegian 4x4 Works Too — Longer intervals are effective, but one-minute bouts may be easier to execute consistently in midlife.

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