ACE - Certified ™: June 2019 - Is There a Ceiling to Success for Group Fitness I Exercise and Fitness Knowledge Level 2 can be used with fitness instructor qualifications and NVQs in Instructing Exercise and Fitness. Réessayez. Exercise and Fitness Knowledge Level 2 can be used with fitness instructor qualifications and NVQs in Instructing Exercise and Fitness. It can also be used with other level 2 qualifications such as GCSE Sport and PE. It has been written to cover the most recent update to the underpinning knowledge for fitness instructing courses How To Become A Fitness Instructor | 10 Tips