UFC Personal Trainer

Here is a list of specific exercises for Mark DellaGrotte.

Mark DellaGrotte jabs
Mark DellaGrotte crosses
Front elbows
Rear elbows
Right knee drivers
Switch knee
Teeps
Mark DellaGrotte combo 1
Mark DellaGrotte combo 2
Mark DellaGrotte combo 3
Mark DellaGrotte combo 4
Mark DellaGrotte combo 5

To track your progress, from the main menu go to:
Player Tracker > Rewards >Mastery Levels > Look for Mark DellaGrotte specific exercises.(thanks to Mr Arrow)

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In order to unlock this achievement, first select "Workouts" from the top left of the home page of the game. Select Mark DellaGrotte from the list of 3 fighters and then choose "Custom Workout". The 12 Mark DellaGrotte exercises that you need to complete are indicated with a little picture of Mark in the bottom corner. There are 6 on the first page and 6 on the second page.

You are only able to add 10 exercises to a custom workout, so you can choose the first 6, complete them, and create a new workout with the second 6. You do not have to choose to do the warmup or cool downs, so you can complete each set of 6 in about 10 minutes.

The achievement will unlock at the workout summary screen following the completion of the 12th exercise.

Most of the exercises are straight forward and easy to complete. The only ones that were a little tricky for me were the "Teeps". You can't just kick for these. Instead, make sure to raise your leg up and then kick.