Final answer:
Russian twists are the exercise that targets the global muscles of the core, engaging multiple core muscles for stabilization and strength.
Step-by-step explanation:
The question "Which of the following is an example of an exercise that targets the global muscles of the core?" is asking about core-strengthening exercises.
Among the options provided, Russian twists (c) primarily target the global (large) muscles of the core, which includes the rectus abdominis, obliques, and the lower back muscles. This exercise involves twisting the torso with a weight or just bodyweight, engaging the entire core for stabilization and strength. On the other hand, leg raises (a) also work on the core but tend to focus more on the lower abdominals, whereas pelvic tilts (b) and isometric holds (d), such as planks, target both the global and local (small, deep) muscles of the core, depending on how they are performed.
Additionally, it's important to incorporate a variety of exercises into a core-strengthening routine to ensure comprehensive development. This includes both uniparallel and parallel exercises, such as crunches, leg lifts, push-ups, and planks. These exercises help in improving core strength and are vital for overall fitness and stability.