The phrase "average trainee" refers to someone who is neither exceptional nor poor in terms of their performance or abilities during a training program. They are considered to be in the middle or average in comparison to others. Full definition
The cable crossover unit requires a large area in the gym, and it's not usually selected by average trainees, as it's considered more of an advanced exercise. (ironmanmagazine.com)
For example, the guys find the pad too big while doing back extension, and shorter than average trainees find the distance too long between the pad and rollers. (abmachinesguide.com)
On average Trainee Recruitment Consultants are promoted within 3 - 6 months and the most successful have earnt in excess of # 50,000 in their first year. (reed.co.uk)