All of the following are aspects of good biomechanical technique EXCEPT Breathing deeply through your nose and mouth.
Keeping your arms straight down at your sides without bending them
Standing nearly erect, with your head up.
Choosing a soft surface, such as a dirt road or grassy area as opposed to concrete or asphalt.

The idea that some faces are inherently more attractive than others is supported by research demonstrating that people we like seem more attractive to us. people prefer averaged composite faces to individual faces. people from different cultures enhance their appearance in different ways. standards of beauty change over time.