Your question is a bit vague, so I would like to confirm before answering: What do you mean by "physical risk"? For example, 1. Are you considering trying extreme sports, outdoor adventures, and activities that challenge your physical limits? 2. Or do you mean other behaviors that involve personal physical risks? In addition, the requirement of "least noticeable way" can also be interpreted in different ways: Do you want to do these activities without attracting too much attention from people around you, or are you worried that the related activities may cause legal, insurance, safety, etc.? In either case, safety and professional guidance should be prioritized when doing any activities that involve physical risks. In general, no matter which method you choose, it is recommended to pay attention to the following points: • Fully understand the risks associated with the activity, do your homework, and receive necessary training and preparation. • If you need to do it in a public place, understand the local regulations and laws to ensure that your behavior is within the permitted range. • If possible, act with experienced partners or professionals, because collective action helps to monitor each other. • Prepare the necessary safety equipment and plan emergency plans in advance. • If you are worried about being too conspicuous, you can consider choosing a less popular venue or off-peak time, and respect the surrounding environment and the safety of others. If you can provide more detailed information, I can give you more targeted suggestions based on your specific situation. Please tell me what kind of activities you want to try or what specific confusion you are facing, thank you!