If you apply to the Regular Force, you will be assessed by the Canadian Forces Leadership and Recruit School during the first week of training, in order to ensure that you have an acceptable level of physical fitness prior to continuing basic training. The Recruiting Centre will not conduct this test.
If you apply to the Primary Reserve Force, you must achieve a minimum fitness standard prior to enrollment in the Canadian Forces. The Canadian Forces Primary Reserve Applicant Physical Fitness Evaluation will be administered by trained professional evaluators during the application process.
http://www.forces.ca/en/page/theapplicationprocess-106#step6-6