Final answer:
Proper spotting technique for the forward step lunge with a barbell requires the spotter to be attentive and ready to assist, with good posture and balance to prevent injury.
Step-by-step explanation:
Proper spotting technique for the forward step lunge when using a barbell involves positioning yourself to ensure the safety and support of the person exercising. Specifically, the spotter should be ready to assist with the weight if the lifter is unable to complete the lift. The correct answer is not provided within the options given, but generally, the spotter should stand close enough to assist without interfering, offer support at the lifter’s torso or under the barbell, and pay close attention to the lifter's movements to anticipate when assistance might be needed. Good posture is crucial for both the lifter and spotter to prevent injury. When spotting a lift like the forward step lunge, it's essential for spotters to maintain their own balance and be prepared to help control the weight throughout the lift.