Gomu Gomu no Mi/Gear Second Techniques

Gomu Gomu no Mi/Gear Second Techniques is a power in Luffi. This technique involves Luffy speeding up the bloodflow in all or selected body parts, in order to provide them with more oxygen and nutrients thus making him much faster and stronger. 

The Gear Second technique uses even more oxygen and energy, using up more food and causing Luffy to pant heavily. The increase in his metabolism causes him to be hungrier than usual or even have a paralysis type effect after prolonged use of it, like in the second fight with Rob Lucci, where Luffy was only able to lie on the floor. Lucci, one of the first of Luffy's opponents to witness it, compares the process to doping.

Japanese Name:	ギア2（セカンド）
Romanized Name:	Gia Sekando
English Name:	Gear Two (Viz), Gear Second (FUNimation dub), Second Gear (Simulcast subs)
Literal Meaning:	Gear Second
User(s):	Monkey D. Luffy
Fighting Style Focus:	Fists, Rubber body, Imperceivable speed movement, Haki
First Appearance:	Chapter 387; Episode 272

Doping is adding more red blood cells to the body part/s, which in turn allows for greater delivery of oxygen and nutrients to the body part/s. In Luffy's case, his organs and blood vessels are made of rubber allowing them to expand and contract at greater rates without tearing. Essentially Luffy increases the blood flow by forcing more blood through his blood vessels thus increase his fighting ability. This mode's enhancements to Luffy's physiology give him the ability to use a new, stronger set of techniques which are generally the same as his old ones, but are so fast that even a skilled assassin would have a hard time actually seeing them. This is called Gear Two in the Viz Manga, Second Gear in the Official Simulcast subs, and Gear Second in the FUNimation dub.