| Abbreviation | Definition |
|---|---|
| BTFF | Brasil Trading Fitness Fair |
| BUF | Bottoms Up Fitness |
| CAFT | Canadian Aerobic Fitness Test |
| CAWF | Conquering Addiction With Fitness |
| CBFW | Conceptually Based Fitness Wellness |
| CCF | Camie Cragg Fitness |
| CCFT | Certified Canine Fitness Trainer |
| CEFA | Council of Exercise Fitness and Athletics |
| CFGB | Community Fitness Glen Burnie |
| CFPE | Cybex Fitness Professional Education |
| CFSN | Certified Fitness for Special Needs |
| CFT | Combat Fitness Test |
| CFW | Community Fitness Wellness |
| CFWP | Civilian Fitness and Wellness Program |
| CFWP | Civilian Fitness Wellness Program |
| CGFI | Certified Group Fitness Instructor |
| CIRF | Coach in Running Fitness |
| CIRF | Coaching In Running and Fitness |
| CKB | Cardio Kick Boxing |
| CKC | China Kettlebell Club |