The Ambidextry advantage

You have a left hand, but you barely use it.
Do you like being one-sided and handicapped?
Two dominant hands are better than one!

Sport:

as a boxer myself I chose boxing to explain what type of advantage you can have from being ambidextrous, so in boxing it must give me a great advantage because my left punch will become more accurate, more powerful, I will be able to change my guard several time in the fight to disturb my oponent ( it's a technique used by some boxers such as Marvin Hagler) hand my left hand will be more effective to protect myself.

Now I chose boxing as an exemple but it's the same for most of the sports you can take advantage of being ambidextrous in  football, basketball, volley, and more..

Here are just a few of the world-class athletes who have used mixed handedness to reach the top of their game:

Michael Jordan (basketball)
Mickey Mantle (baseball)
Phil Mickelson (golf)
Pelé (soccer)
Eli Manning (football)
Michelle Kwan (figure skating)
James J. Jeffries (boxing)
Maria Sharapova (tennis)
Gordie Howe (ice hockey)
Jonathan Edwards (triple jump)

Pete Rose learned to bat left-handed, leading him to a major league record of the most career hits. Martina Hingis once won a tennis tournament left-handed after breaking her right pinky. Mike Collins set the world record for the shortest boxing match with a last-second southpaw switch, knocking out Pat Brownson in 4 seconds.

other capacities

OK, but what if you're not a big athlete? Well, neither am I. And neither were Leonardo da Vinci, Michelangelo, Albert Einstein, Alexander Fleming, Nikola Tesla, Ludwig van Beethoven, Robert Baden-Powell, James Garfield, Harry S. Truman, and many others who found advantages to being mixed-handed. The benefits of mixed handedness aren't limited to the physical ones.

Researchers have spent a lot of time over the years looking into the differences between left-handers and right-handers, and found very little. But recently, we discovered that all along we've been looking at the wrong thing. The important difference is not left-handed vs. right-handed, but strongly-handed vs. mixed-handed.

The corpus callosum, the bundle of nerve fibers that connects our brain hemispheres, is thicker in mixed-handers. And studies have shown mixed-handers to be better able to read people, see both sides of an issue, and recall details of an event and their context. Better integration and balance of the brain hemispheres allows a better kind of thinking.