NOTE: Ribs should be always kept in the refrigerator (approx. 40 F/4.4 C) before preparation. 1  Take the meat out of the refrigerator. 2  Rinse in cold water. 3  Remove any excess fat and extraneous meat pieces, or stuff you don't want to eat.  Remove the membrane (on inner 1  side). Rinse again, pat dry with a paper towel.
Also, a recent study on 168 college students found that your average college-aged female has a plank time of about 1 minute, 30 seconds, while an average college-aged male has a plank time of about 1 minute, 46 seconds (2).
I can do a 1 min. 30 sec. plank for 4 sets after a really heavy weight lifting workout. All my planks are in perfect form, but I can only 3 sets back to back but have trouble doing the 4th one. I rest for 2 min. between sets and am increasing each set by 5 sec. everyday until I can do 10+ min. (preferably 15 min).