Reps = Repetitions, or one complete motion of an exercise. i.e. We performed 10 reps of a bicep curl, rested, then performed another 10 reps.
Sets = How many times you will repeat that exercise for the set number of repetitions. i.e. We performed 3 sets of 10 reps of bicep curls.
DB = Dumbbell
T = Total Reps
Ea = Reps for each side
AMRAP = As Many Rounds (or Reps!) As Possible
EMOM = Every Minute On the Minute
RDL = Romanian Deadlift
Mtn Climb = Mountain Climbers
Good AM = Good Morning
Rev = Reverse, i.e. Reverse Lunge
Alt = Alternating, i.e. alternating between the left and right legs, perform 10 Alt. Reverse Lunges.