Final answer:
The specificity principle of fitness indicates that swimmers should focus on swimming during training to improve relevant skills and techniques. Starting techniques are crucial for competitive advantage. Advances like drag-reducing bodysuits also enhance performance.
Step-by-step explanation:
The specificity principle of fitness would suggest that if one is planning to compete in a swimming event, one should train primarily by swimming. This principle emphasizes that training should be relevant to the sport for which performance improvement is sought. For instance, swimmers need to develop the muscles and techniques specific to swimming, enhancing their performance in the water.
Start-offs are crucial in competitive swimming because they can set the tone for the race. A strong, balanced start can give an athlete an immediate lead and can influence the outcome. Training for the right posture and explosive power off the blocks is essential for a good start.
Technological advances, such as the development of full bodysuits designed to minimize drag, also play a significant role in competitive swimming. These bodysuits can reduce resistance in the water, potentially improving swimmers' speed and leading to the breaking of world records.