Brian MacKenzie joins Mark Bell to break down aerobic fitness, nasal breathing, HRV, walking for recovery, and the 2.3 watts/kg test that reveals whether you're truly metabolically fit. They also discuss nervous system regulation, breathwork, endurance training, and why aerobic capacity might be the missing piece for strength athletes.Follow Brian MacKenzie:Instagram: https://www.instagram.com/_brianmackenzieInstagram: https://www.instagram.com/shiftadaptWebsite: https://shiftadapt.comSpecial perks for our listeners below!🥩 HIGH QUALITY PROTEIN! 🍖 ➢ https://goodlifeproteins.com/ Code POWER to save 20% off site wide, or code POWERPROJECT to save an additional 5% off your Build a Box Subscription!🩸 Get your BLOODWORK/TRT/PEPTIDES! 🩸 ➢ https://marekhealth.com and use code "POWERPROJECT" for 10% off Self-Service Labs and Guided Optimization®.🧠 Methylene Blue: Better Focus, Sleep and Mood 🧠 Use Code POWER10 for 10% off!➢https://troscriptions.com?utm_source=affiliate&ut-m_medium=podcast&ut-m_campaign=MarkBel-I_podcastBest 5 Finger Barefoot Shoes! 👟 ➢ https://Peluva.com/PowerProject Code POWERPROJECT15 to save 15% off Peluva Shoes!Self Explanatory 🍆 ➢ Enlarging Pumps (This really works): https://bit.ly/powerproject1Pumps explained: https://youtu.be/qPG9JXjlhpM?si=JZN09-FakTjoJuaW🚨 The Best Red Light Therapy Devices and Blue Blocking Glasses On The Market! 😎➢https://emr-tek.com/Use code: POWERPROJECT to save 20% off your order!👟 BEST LOOKING AND FUNCTIONING BAREFOOT SHOES 🦶➢https://vivobarefoot.com/powerproject🥶 The Best Cold Plunge Money Can Buy 🥶 ➢ https://thecoldplunge.com/ Code POWERPROJECT to save $150!!➢ https://withinyoubrand.com/ Code POWERPROJECT to save 15% off supplements!➢ https://markbellslingshot.com/ Code POWERPROJECT to save 15% off all gear and apparel!Follow Mark Bell's Power Project Podcast➢ https://www.PowerProject.live➢ https://lnk.to/PowerProjectPodcast➢ Insta: https://www.instagram.com/markbellspowerproject➢ YouTube: https://www.youtube.com/markbellspowerprojectFOLLOW Mark Bell➢ Instagram: https://www.instagram.com/marksmellybell➢https://www.tiktok.com/@marksmellybell➢ Facebook: https://www.facebook.com/MarkBellSuperTraining➢ Twitter: https://twitter.com/marksmellybellFollow Nsima Inyang➢ Ropes and equipment: https://thestrongerhuman.store➢ Community & Courses: https://www.skool.com/thestrongerhuman➢ YouTube: https://www.youtube.com/c/NsimaInyang➢ Instagram: https://www.instagram.com/nsimainyang/?hl=e#PowerProject #Podcast #MarkBell #FitnessPodcast #markbellspowerproject