UFC strawweight Mackenzie Dern put on a dominant performance in her sophomore octagon appearance over the weekend. With that in mind, the win did not go without its controversies. Dern faced off against Amanda Cooper in a catchweight bout at UFC 224, ultimately earning a first round submission victory over her opponent. Of course, Dern missed weight for the bout by 7.4 pounds. The fighter would later point out that she missed her flight for Rio de Janeiro, Brazil leading up to the match. Beyond that, Dern was offered to leave her fight camp. Now Dern is taking some time with Black House MMA. In one of the fighter's latest social media posts, Dern decided to show off a glimpse of her training with the gym. Check it out within the Instagram post below: https:\/\/www.instagram.com\/p\/Bi4k9LUHo8i\/?taken-bymackenziedern For more MMA news click here.