To be Dauntless you have to conquer fear. Your doubts, your hesitations, your very thoughts of possible weakness, must all vanish. But to get "there" you need to take the journey fighting the weakness of your body all the way, forging a weapon out.
Sometimes the extra little push you need to move forward when you've hit a wall in your strength training is actually to build back strength. Grind through these challenging exercises for great results!
If you need a quick workout, but you want to make sure it's effective, do a tabata workout. Tabata is a type of training created by Dr. Izumi Tabata, that is a form of HIIT (High Intensity Interval. Get hip to the TABATA workouts.