I Ran Everyday For 30 Days, It Changed My Life
In a Nutshell
The creator ran daily for 30 days using zone 2 training and Norwegian intervals, raising his VO2 max from 58.3 to 61.3 while preserving all muscle mass and dropping 1% body fat. Proper sequencing of cardio after weights, higher carb intake, and strategic pacing enabled him to finish third in a Hyrox competition against elite international teams. The key lesson is that structured endurance work can be added to strength training without sacrificing muscle if recovery, nutrition, and training order are managed correctly.
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Running is often viewed negatively due to its difficulty and the belief that excessive cardio will reduce muscle gains. The experiment involves running daily for 30 days while using MRI scans to measure muscle changes, alongside multiple tests tracking body composition and heart health. The challenge culminates in competing in London against top athletes and influencers.
A VO2 max test was conducted to establish baseline cardio fitness. The average gym-goer scores in the mid-30s to 40s, while elite athletes reach much higher values, with Cristiano Ronaldo rumored to have scored as high as 75. The test revealed a day-one score of 58.3, placing the participant in the top 2% for his age despite minimal prior cardio training.
Two critical problems were identified from the test data. The respiratory exchange ratio showed the body had become inefficient at burning fats for energy and instead preferred burning limited carb stores. Post-test blood work revealed lactate levels of 10.5, which is very high. Lactate accumulation during intense activity causes hydrogen ions to build up, creating painful burning sensations in muscles. In extreme cases, this can lead to vomiting, nausea, and even death.
Zone two training was introduced to address lactate clearance and fat-burning efficiency. This involves maintaining heart rate at 60-70% of maximum, which for the participant equals 120-140 beats per minute. A key indicator of proper zone two intensity is the ability to hold a conversation without excessive heavy breathing. Sessions require 45-60 minutes minimum to achieve full benefits.
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