How much is deducted for failing to attain a straight hollow body position on the upswing in Level 4 bars during a tap swing forward with a 1/2 turn dismount?

The deduction for failing to attain a straight hollow body position during the upswing of a tap swing forward with a half turn dismount in Level 4 bars is indeed 0.20. This deduction is applied because the straight hollow body position is a fundamental element in executing a proper tap swing. It is essential for maintaining form and control, which are critical aspects of the skill.

When the gymnast does not achieve this position, it indicates a lack of core strength and body alignment, which can not only impact the aesthetics of the routine but also the safety of the dismount. The 0.20 deduction appropriately reflects the significance of this element while still allowing for minor variations that may not severely compromise the overall performance.