In gymnastics, how is an additional arm swing during landing typically penalized?

An additional arm swing during landing in gymnastics is penalized to maintain consistent judging standards concerning a gymnast's control and stability upon landing. When a gymnast completes a routine element and lands with an arm swing, it indicates a lack of balance or control, which is considered a deduction to reflect the technical execution of the skill.

The penalty of up to 0.1 is standard for this type of error, allowing judges to assess the severity of the deduction based on the extent of the arm swing. This deduction is not as severe as those for more significant errors like falls or significant steps taken away from the intended landing position, which would incur larger penalties. Thus, the specific amount of 0.1 serves to reflect the importance of precision and control in landing while still providing some leniency for minor errors. This deduction structure encourages gymnasts to improve their stability during routines without heavily penalizing smaller mistakes that do not drastically affect the overall performance.