How to train your cardiovascular fitness Peter Attia NEW

Optimizing cardiorespiratory fitness involves maximizing both Zone 2 endurance and VO2 max, typically following an 80-20 training ratio for volume.

• Prioritize an 80-20 split: 80% Zone 2, 20% VO2 max for optimal cardiorespiratory fitness.

• Perform Zone 2 workouts in steady-state for at least 30 minutes to maximize mitochondrial efficiency.

• Implement VO2 max intervals lasting 3-8 minutes, balancing intensity to avoid premature fatigue.

Developing cardiorespiratory fitness requires a balanced approach to training Zone 2 (base endurance) and VO2 max (peak performance), aiming to maximize the 'area of a triangle' rather than just its height or width. A general rule of thumb for both elite athletes and ordinary individuals is to dedicate approximately 80% of training volume to Zone 2 and 20% to VO2 max. Effective Zone 2 training emphasizes steady-state efforts for at least 30 minutes, prioritizing physiological response over simple heart rate data, while VO2 max training involves intense, sustained intervals typically lasting three to eight minutes.

Training Philosophy & Ratio

• 00:00:00 Achieving optimal cardiorespiratory fitness means developing both your Zone 2 (base endurance) and VO2 max (peak capacity), metaphorically maximizing the 'area of a triangle'. A widely applicable training principle, for both everyday individuals and elite athletes like cyclist Tadi Pogacar, is an 80-20 rule, where 80% of training volume is dedicated to Zone 2 and 20% to VO2 max efforts. Some top athletes even lean closer to a 90-10 split, underscoring the importance of foundational Zone 2 work.

Structuring a Weekly Routine

• 00:01:17 After determining available training time, one can apply the 80-20 principle to structure a weekly cardiovascular regimen, such as Peter Attia's personal schedule of four to five hours weekly. His routine includes four Zone 2 workouts and one VO2 max session, interspersed with strength and stability training days. He prefers to perform VO2 max training after Zone 2 to ensure sufficient reps and preparation, having historically accumulated at least 1,000 kilojoules of work before intense sets.

Zone 2 Training Modalities & Efficacy

• 00:04:40 Zone 2 training should involve steady-state modalities such as swimming, running, cycling (indoors or on flat, traffic-free paths), treadmills, or stair climbers, with a minimum session length of 30 minutes. It is crucial to engage in continuous steady-state effort to harness mitochondrial efficiency and push oxidative phosphorylation to its limit before glycolysis. Simply accumulating minutes in Zone 2 by intermittently passing through it during a varied workout is not physiologically equivalent to sustained effort, as indicated by heart rate monitors alone, which are considered the least accurate approximation compared to lactate or RPE.

VO2 Max Training Strategies

• 00:08:01 VO2 max training can be done using almost any modality that elevates heart rate significantly, including air bikes, treadmills, stair climbers, or outdoor running, specifically targeting intervals of three to eight minutes. Peter Attia typically employs four-minute on, four-minute off repeats on a bike, aiming for a consistent wattage that feels easy initially but becomes very uncomfortable by the three-minute mark without crashing. A 'poor man's' alternative involves one-minute sprints on a stair climber followed by two minutes of recovery, repeated for 20-30 minutes.