Group Fitness Instructor

Answer: D - Although a dramatic increase in heart rate may be a clear sign of overexertion, it cannot serve the GFI as a red flag because it must be individually assessed. Classic signs of overexertion that a GFI is able to monitor any time during class include: a marked degradation in the ability to execute movements that were initially achievable; “cheating” behaviors (such as locking elbows or overusing momentum to perform a lift); labored breathing; excessive sweating and loss of balance episodes.