Final answer:
The close grip seated cable row is an isotonic exercise that engages multiple muscles in the back. It can be considered both aerobic and anaerobic depending on the resistance and duration of the exercise.
Step-by-step explanation:
The close grip seated cable row is an isotonic exercise. Isotonic exercise refers to a type of muscle contraction where the muscle length changes, such as when you perform a bicep curl or a squat. In the close grip seated cable row, the muscle length changes as you pull the cable towards your body, engaging multiple muscles in the back.
As for the energy system used during this exercise, it can be considered both aerobic and anaerobic. The predominantly aerobic energy system is used during lighter resistance and longer-duration exercises, while the anaerobic energy system is dominant during high-intensity and shorter-duration exercises. Since the close grip seated cable row can be performed with varying resistance and durations, it can engage both energy systems.