12 weeks free when you join FORGE+Claim it
Live
◆New pooled analysis: 1.6 g/kg protein is the real muscle ceiling◆FORGE Lab: 9 running shoes tested across 400 miles◆Sleep restriction study — strength holds for exactly three days◆Coronary calcium scoring now covered by more insurers in 2025◆Creatine and cognition: the sleep-deprivation finding, explained◆The 12-week engine rebuild added 11.4% VO2 max with no strength loss◆New pooled analysis: 1.6 g/kg protein is the real muscle ceiling◆FORGE Lab: 9 running shoes tested across 400 miles◆Sleep restriction study — strength holds for exactly three days◆Coronary calcium scoring now covered by more insurers in 2025◆Creatine and cognition: the sleep-deprivation finding, explained◆The 12-week engine rebuild added 11.4% VO2 max with no strength loss
48 stories
Build the engine

Fitness

Programming, conditioning and recovery science that survives contact with a real schedule.

Stories
6
Total reads
556.7K
Avg read time
11 min
Writers
3
The 12-Week Engine Rebuild

Lead story

The 12-Week Engine Rebuild

Our editors spent a season testing a conditioning block that adds real aerobic horsepower without costing you a single pound of muscle. Here is the whole protocol, including the weeks it goes wrong.

14 min 284.3K