Can you plank for only 20 seconds? How about doing it with 200kg (440 pounds) on your back! Pretty impressive core strength!
PLEASE! DO NOT TRY THIS AT HOME!
In this video is 16 year old Matthew Myers. He is one of my old patients that popped in last week to train a bit at our facility at The Gym at The Campus during his mid-term break. Watch out for him everyone, remember his name, he is going to be a Springbok real soon!