Longest single arm plank while balancing on medicine balls
Who
William Borger
What
47.54 second(s)
Where
Canada (Calgary)
When

The longest single arm plank while balancing on medicine balls is 47.54 seconds, and was achieved by William Borger (Canada) in Calgary, Alberta, Canada on 14 October 2016.

William proposed this record idea himself, and has been practicing this skill for the past one and a half years.