Complete each achievement to get the allotted gamerscore. The numbers between the () is the points given for each achievement.
| Achievement | How to unlock |
| The First Step (5) | Complete a new profile by creating a new character for your Fitness Program |
| Full House (5) | Complete all exercises in any exercise routine |
| Everything In Moderation (10) | Complete any Light or Moderate routine scoring 4 or more for proficiency |
| Electric Circuitry (20) | Complete a Challenging, Hard or Intense Circuit Training routine scoring 4 or more for proficiency |
| Float Like A Butterfly (20) | Complete a Challenging, Hard or Intense Box-Fit routine scoring 4 or more for proficiency |
| Yoga Master (20) | Complete a Challenging, Hard or Intense Yoga routine scoring 4 or more for proficiency |
| On Your Weigh In (10) | Complete 1st week |
| Weigh To Go (20) | Win the weekly weigh-in event in a fitness program |
| 28 Days Lighter (20) | Complete a 4 week fitness program |
| 8 Weeks Fitter (50) | Complete an 8 week fitness program |
| 3 Months Thin (100) | Complete a 12 week fitness program |
| The Biggest Loser (100) | Win the Biggest Loser competition! |
| Halfway House (50) | Get halfway towards achieving your personal goals |
| Mission Accomplished (100) | Achieve your personal goals! |
| A Good Start (10) | Complete all your scheduled exercise routines for a week |
| Commitment to the Cause (40) | Complete all your scheduled exercise routines for 4 weeks |
| True Dedication (100) | Complete all your scheduled exercise routines for 12 weeks |
| Up To The Challenge (5) | Win a challenge event |
| Challenges Overcome (15) | Win all 5 challenge events |
| The Ultimate Challenger (50) | Win all challenges at the Intense difficulty level |
| Home Run (50) | Complete all exercises in the fitness test |
| Decathlete (20) | Complete 10 hours of exercise |
| Olympian Endurance (50) | Complete 24 hours of exercise |
| Plank's Constant (1) | Complete 5 perfect consecutive sets of Plank with Leg Lifts in freeplay |
| Pardon Me (1) | Complete 5 perfect consecutive sets of Burpees in freeplay |
| So Sumo (1) | Complete 5 perfect consecutive sets of Sumo Squat Jacks in freeplay |
| The Big Push (1) | Complete 5 perfect consecutive sets of Push-Ups in freeplay |
| Hip Hip Hooray (1) | Complete 5 perfect consecutive sets of Hip Lift with Raised Legs in freeplay |
| The First Spark (10) | Burn a total of 1000 Calories in game |
| Glowing Embers (10) | Burn a total of 2500 Calories in game |
| On Fire (10) | Burn a total of 5000 Calories in game |
| Burning Brightly (10) | Burn a total of 10000 Calories in game |
| Raging Inferno (10) | Burn a total of 25000 Calories in game |
| Food For Thought (10) | Match your recommended calorie intake for every day before a weigh-in |
| Extra Curricular (10) | Burn more than 100 calories of additional exercise for every day before a weigh-in |
| Doctor in the House (10) | Reduce your KYN score to show an improvement in your general health |
| Fitter Friends (5) | Complete an exercise routine with a friend in multiplayer |
| Bring A Buddy (5) | Play a challenge event with a friend in multiplayer |
| Fitness Coach (5) | Create an exercise routine in freeplay mode and save it |
| We Have The Technology (5) | Use the Body Analyzer to create a Personalized Fitness Program |
| TBL: Contestant (5) | Achieve a Fit Score greater than 5000 |
| TBL: Challenger (5) | Achieve a Fit Score greater than 10000 |
| TBL: Finalist (5) | Achieve a Fit Score greater than 50000 |
| TBL: Personal Trainer (5) | Achieve a Fit Score greater than 100000 |
| TBL: Fitness Guru (5) | Achieve a Fit Score greater than 250000 |