Cycling Training What is the 80% rule in cycling? February 2, 2026 by Mercier | Leave a Comment The 80% rule in cycling is a training principle that suggests cyclists should spend 80% of their training time at a low intensity and the remaining 20% at a high intensity. This approach helps improve endurance and performance by balancing aerobic and anaerobic efforts, making it popular among both amateur and professional cyclists. What is […] Read more ยป