

Episode #370: Dr. Sohee Carpenter on High-Intensity Circuits vs. Traditional Lifting, New Research, and Coaching Her Mom
Oct 14, 2025
Dr. Sohee Carpenter, a PhD in Sports Science and evidence-based fitness coach, shares her research on high-intensity circuit training (HICT) vs. traditional strength training. She reveals surprising findings that both methods yield similar strength and muscle growth when effort is matched. Time efficiency plays a big role, with HICT being quicker. Sohee also discusses her experience coaching her 64-year-old mother, emphasizing gradual progress and enjoyment. The episode tackles how personal preferences and logistics should guide training style choices, regardless of misconceptions about resistance training.
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Matched Effort Yields Similar Results
- When effort, loads, sets and proximity to failure are matched, high-intensity circuits and traditional strength training produce similar strength and hypertrophy in trained women.
- This suggests training preference and time constraints should guide modality choice.
Choose Circuits For Time Efficiency
- Use circuit training to save time: Dr. Carpenter's circuit sessions averaged ~50–55 minutes versus ~70–75 minutes for traditional sessions.
- Choose circuits if limited by scheduling, commute, or gym logistics to improve long-term adherence.
Alternate Muscle Groups In Circuits
- When programming circuits, alternate muscle groups to minimize fatigue crossover and preserve training load and reps.
- Pair peripheral or antagonist movements to keep performance high across sets.