Returning to the present day, Seiler says the 80/20 split should be used as a guideline rather than a strict rule, so he ‘can live with training 85/15 or 75/25’. But he stresses that you ...

New research suggests that most endurance athletes—even weekend warriors—must slow down to get fast. ... 80/20 training will better improve race performances than HIIT alone.

His research found that the 80/20 rule is followed almost universally by top-level runners, cyclists, swimmers, triathletes, cross-country skiers, and rowers around the globe. But it wasn’t always.

Tip 2: 80:20 vision. Imagine a training pyramid. The 80% is “horizontal” and represents the solid platform of long sessions, basic endurance, extending your comfort duration.

A new study suggests that doing intense interval training for 20 minutes three times a week is just as effective at boosting strength and endurance as five to six hours of jogging or moderate cycling.

Is endurance training bad for you? Sports medicine physicians find no evidence of heart damage from long-term endurance training by elite master athletes Date: May 31, 2016 Source: University Saarland ...