: Working the #core for #ThursdayThirty Give me 30 seconds on, 15 seconds recover of both #exercises , for a total of 4 sets. Click on link in bio for more exercises and #workouts Check out our @Youtube channel (XTrainFit) and subscribe. #Fitness #Workout #Muscle #Muscles #Toning #Abs #Abdominals #Strength #Strong #Fit #Shredded #Active #Ripped #Training #sweat #athletic #goals #work #weightlifting #fitnessgoals #fitnessaddict #muscleups #activity #XTrainFit #XTFNation