Final answer:
The question touches upon Health, focusing on the importance of toned skeletal muscles and rigorous training for the athletic performance of tennis players like Serena Williams and Stan Wawrinka.
Step-by-step explanation:
Although the question mentions Serena Williams and Stan Wawrinka as French Open tennis champions, the core subject relates to Health, specifically the role of toned skeletal muscles in athletic performance. To find answer in 2 lines, one must look at the relationship between training and muscle development in athletes. An explanation in 200 words would highlight that tennis players like Williams and Wawrinka undergo rigorous training routines to enhance their muscular strength and endurance. This training is crucial as it enables their muscles to generate the necessary force for movements such as serving, returning balls, and moving swiftly across the court.
Toned muscles contribute significantly to an athlete's success by not only providing power but also by aiding in injury prevention. Strong, resilient muscles support the joints, reducing the risk of strains and sprains. In this way, the dedication to training and developing well-conditioned muscles is a key factor in the achievement and longevity of champions like Williams and Wawrinka.