The Power of 30/30s, 30/15s & 40/20s: The VO₂max Interval Formats Every Cyclist Should Use
When it comes to improving VO₂max, few cycling workouts are as effective—or as misunderstood—as 30/30s, 30/15s, and 40/20s. These short, repeatable, high-oxygen-demand intervals have become staples for endurance cyclists, triathletes, and time-crunched riders who want maximum performance with minimal training...