Pressure fighting

Throughout the history of gloved boxing styles, techniques and strategies have changed to varying degrees. Ring conditions, promoter demands, teaching techniques, and the influence of successful boxers are some of the reasons styles and strategies have fluctuated. One reason why research in this area is complex is because boxing itself is a complex endeavor where no person is psychologically, mentally, or physiologically exact. No era had strange holds on particular styles of boxing. Prevailing techniques of one era overlap into prevailing styles of another as well as coming full circle around.

There are four generally accepted boxing styles that are used to define fighters. These are the swarmer, out-boxer, slugger, and boxer-puncher. Many boxers do not always fit into these categories, and it's not uncommon for a fighter to change their style over a period of time.

The swarmer (in-fighter, crowder) is a fighter who attempts to overwhelm his opponent by applying constant pressure - taking away an opponent's spacing and timing. Swarmers tend to have a very good bob and weave, good power, a good chin, and a tremendous punch output (resulting in a great need for stamina and conditioning). Boxers who use the swarmer style tend to have shorter careers than boxers of other styles. Sustaining the adequate amount of training required to execute this style is nearly impossible throughout an entire career, so most swarmers can only maintain it for a relatively brief period of time. This inevitably leads to the gradual degradation of the sheer ability to perform the style, leaving him open to increasing amounts of punishment. This style favors closing inside an opponent, overwhelming them with intensity and flurries of hooks and uppercuts. They tend to be fast on their feet which can make them difficult to evade for a slower fighter; or are great at cutting the ring with precise footwork. They also tend to have a good "chin" because this style usually involves being hit with many jabs before they can maneuver inside where they are more effective. Many swarmers are often either shorter fighters or fighters with shorter reaches, especially in the heavier classes, that have to get in close to be effective. Tommy Burns was the shortest Heavyweight champion at 5'7, while Rocky Marciano had the shortest reach at 67-68 inches. One exception is Jack Dempsey, who was nearly 6'1 with a 77-inch reach. Famous swarmers include Henry Armstrong, Carmen Basilio, Nigel Benn, Melio Bettina,Tommy Burns, Joe Calzaghe, Julio Cesar Chavez, Steve Collins, Jack Dempsey, Joe Frazier, Kid Gavilan, Gennady Golovkin, Román González, Harry Greb, Emile Griffith, Fighting Harada, Ricky Hatton, Jake LaMotta, Rocky Marciano, Terry McGovern,Sam McVey, Battling Nelson, Bobo Olson, Manuel Ortiz, Floyd Patterson, Aaron Pryor, Sailor Tom Sharkey, David Tua, Mike Tyson, Micky Ward, and Mickey Walker.

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