A man has held the plank position for 8 hours in a competition in Beijeng. https://www.washingtonpost.com/vide...0a1450-1a03-11e6-971a-dadf9ab18869_video.html
This is the position:

I do the plank as part of my workout. My goal is 2 minutes, but I'm only up to 30 seconds now. The plank firms your entire middle section - back, abs, and internal muscles.
This is the position:

I do the plank as part of my workout. My goal is 2 minutes, but I'm only up to 30 seconds now. The plank firms your entire middle section - back, abs, and internal muscles.