Short Answer 
The answer outlines a process to identify individual sports and evaluate their physical demands. It concludes that swimming is one of the most strenuous individual sports due to its rigorous muscle engagement and high endurance requirements.
Step 1: Identify Individual Sports
Start by examining the various individual sports available for competition. These sports include:
- Swimming
- Diving
- Running
- Ice Skating
- Wrestling
- Gymnastics
- Golf
- Tennis
- Skateboarding
- In-line Skating
- Biking
- Martial Arts
- Bowling
Step 2: Evaluate Strenuousness
Next, assess the physical demands of these sports to determine which is the most strenuous. For instance, swimming is often highlighted for its rigorous requirements:
- Engagement of specific muscle groups
- High endurance levels
- Significant power and strength output
Step 3: Conclusion on Swimming
After evaluating the strenuous nature of these sports, it can be concluded that swimming stands out. This sport not only challenges an athlete’s physical endurance but also demands both technical skill and muscle coordination, making it one of the most physically demanding individual sports available.