Abdominal exercises progression

https://www.instapaper.com/read/2011664843

Abdominal Exercises Progression<br/>Because of tradition, abdominal exercises are often executed in long sets of 50, 100, or even 200 repetitions. Friends even turn it into a contest:<br/>– “I did 4 sets of 200!”<br/>– “Really? I did 6 of 300