Final answer:
Obesity and age can increase the risk of restraint-related positional asphyxia, while gender is not a clear standalone risk factor.
Step-by-step explanation:
The risk of restraint-related positional asphyxia can be influenced by various physical and health-related factors. Obesity is one of the noted risk factors, as excessive body weight can exacerbate breathing difficulties when a person's movement is restrained in certain positions. Factors such as age and specific health conditions may also amplify the risk. However, gender by itself has not been clearly identified as a separate risk factor for positional asphyxia.