Mark Bell's Power Project The Aerobic Fitness Test That Exposes Your Real Conditioning | Ft. Brian MacKenzie
27 snips
Mar 5, 2026 Brian MacKenzie, performance coach and founder of Shift Adapt, known for aerobic conditioning and breathing science. He covers nasal breathing and HRV, why walking aids recovery, the 2.3 watts/kg 20-minute aerobic test, and how low-intensity work boosts strength training resilience. Practical breath holds, ventilation differences, and programming choices for long-term, generalist fitness are highlighted.
AI Snips
Chapters
Transcript
Episode notes
Spinal Cord Compression Taught The Value Of Progressive Warm Ups
- Brian recounts compressing his spinal cord after heavy good mornings, which produced long rehab phases.
- He used progressive warm-up volume later to return to high training and regained capacity over months.
Use Weighted Vest Walks Occasionally For Extra Load
- Do include weighted vest walking occasionally to raise load and heart rate.
- Brian wears a weighted vest 1–2x/week to challenge system organization and energy use, but avoids constant use to retain training effect.
Assess Metabolic Function Don't Rely On Perceived Fitness
- Do test metabolic function with a stepped metabolic cart or simple bike protocol rather than guessing fitness.
- Brian runs metabolic assessments to correlate ventilation, VO2, and muscle oxygen to expose hidden aerobic deficits.