Rational Blog: Thoughts on Golf and the World

Angelina Ye wins her first AJGA Invitational

By Gisle Solhaug |

Angelina Ye, a 16-year-old student at the IMG Golf Academy won the AJGA Invitational at World Golf Village yesterday (January 15, 2018).  She played the final round one under par to secure the victory.  She is thereby qualified for Symetra Tour´s Florida´s Natural Charity Classic in March.

Angelina is one of several players at the IMG Academy that is taking advantage of the BioMatch one-swing golf club matching system.  Angelina had her clubs matched just two weeks before the tournament.  She is a very talented and hard-working young lady that has already been accepted to Stanford University. 

Angelina appeared on the Morning Drive on the Golf Channel this morning together with Annika Sorenstam.  She impressed everyone with her focus on both Academics and Golf.  It will be very interesting to watch her progress.

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Another Victory for BioMatch

By Gisle Solhaug |

Gregory Solhaug (14) of Norway won the IMG Junior Tour at North Shore GC in Orlando this weekend (October 21- 22, 2017).  Shang Huang (14) of China was leading by one shot after the first day.  On the final day, Shang was hitting every fairway with long drives.  He outdrove Gregory with an average of 70 yards.  Although Gregory needed long irons and woods to reach the greens in regulation, he only missed one green in regulation.  His approach shots were so accurate that he made three birdies on the last day and shot three under par.  Winning the tournament by seven shots.  It is more important where you put from than how good your putting is.  Gregory´s clubs are matched by #BioMatch, which helps him shoot straight with every club.


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Take Five Shots Off Your Game, Effortlessly

By Gisle Solhaug |

So far we have matched about 250 golfers with the revolutionary BioMatch system.  Typically 20 handicappers start playing five strokes under their handicap after a few rounds of golf.  We have fitted about twenty serious junior players; they all post better scores and do better in tournaments instantaneously. 

BioMatch is a computer application, available at www.rational-golf.com, which creates a model of your body swinging your clubs.  It thereby determines the exact weight to be added to the grip end of each of your clubs for you to use the same swing for all your clubs.  The tailored set of weights is specified in the BioMatch report and is then ready for order.

After having the tailored BioMatch weights fitted in your shafts, you will notice a difference in how the clubs feel when you swing them.  Before your first game with your “new” clubs, we suggest a session at the driving range to get a feel for how they swing.  When hitting balls at the range try to relax your wrists and trust the clubs without trying to steer the club head.  Some golfers will experience an instant improvement in ball striking.  Others will only notice a slight improvement during the first round, but then continue to improve over time as the subconscious mind is getting used to only handling one swing rather than 13. Some golfers report that the clubs feel weird the first day, then the next day they cannot even feel that the weights are there.

The overall mass of a golf club affects how fast the hands move in the downswing.  The moment of inertia around the center of your grip (MOIG) of a golf club affects how quickly the club releases, or swings around the hands.  Specifying and applying the correct ratio between MOIG and Mass of each club will match the clubs so that the hands will be in the proper position at impact.  Once the golfer achieves a good swing with one club, the good swing will automatically transfer to every club in a set matched by BioMatch.  That is how BioMatch makes you hit more fairways and greens and lower your scores.

Click here to get started with BioMatch.

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Why It Sucks To Be a Golfer

By Gisle Solhaug |

Thirteen Different Swings

Golfers play with 13 different full swing clubs of random Mass and Moment of Inertia.  These are the two physical properties that affect how a club behaves when swung.  Still, these two properties are ignored by the golf industry.  The subconscious mind of the golfer thereby has to learn one swing for each club.  It also has to tell them apart by waggling the club before swinging it.  To swing one club in an efficient and consistent manner is an achievement.  To learn thirteen different swings and be able to tell them apart at a subconscious level is next to impossible. 

Even if the club makers wanted to produce clubs of optimal Mass and Moment of Inertia, it would not be easy to do as the properties of each golfer comes into play as well.  The physical properties of each club would have to be optimized for each and every customer.

Brain Maps (Muscle Memory)

It gets worse; it has been found that while growing one brain map, another brain map may shrink.  This, as brain maps are competing for neurons and space (Zumerchik, 2010).   For example, by practicing with a 9-iron, the proficiency of the other 12 clubs will drop.  The only way to solve this problem is to have one brain map that covers all thirteen full swing clubs. 


Rational Golf LLC of Florida has solved the problem by creating an algorithm, named BioMatch, that makes a computer model of the player´s body swinging each of the clubs in the bag.  Based on input such as body mass and height and various properties of the clubs the algorithm calculates how much weight has to be added to the grip end of each club for the upper body, hands, and clubhead to be synchronized at the impact position, while the golfer applies one consistent swing.  This is how the BioMatch method of golf club matching takes the complexity out of golf.



The BioMatch method of matching golf clubs is available on www.rational-golf.com.  Any golfer or club fitter may use the site to carry out the calculations and order a tailored set of weights to be inserted into the grip end of the clubs.  The original weight of each club has to be entered on the website, so keep a kitchen scale handy.  Club fitters that have converted to the BioMatch method of matching golf clubs, and thrown away the Swingweight scale, are able to measure the moment of inertia.  For those that do not yet have access to a moment of inertia scale, the moment of inertia will be estimated based on club weight and a database of clubhead weights.

Mass Production

Rational Golf has developed a method that golf club manufacturers can implement for taking online orders and optimize the weight of each club to suit each customer in an efficient manner.

The inventor of BioMatch and founder of Rational Golf LLC, Gisle Solhaug, can be contacted on [email protected].

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Rational Golf Appoints Designer Golf UK Distributor

Rational Golf LLC of Florida has signed a distributor agreement with Designer Golf Ltd club fitting studio of the United Kingdom.  The contract gives Designer Golf the rights to deliver the revolutionary BioMatch One-Swing Golf Club Matching system directly to its customers.  BioMatch will provide more accuracy and distance to all Designer Golf´s club-fitting customers and thereby improve the competitiveness of Designer Golf.

BioMatch offers effortless improvement to any golfer's game by matching the golf clubs within the set and to the body of the golfer.  Thereby taking back the accuracy and distance that Swingweight matched golf clubs are robbing you off.  The revolutionary system is applied to any golfer´s clubs, old or new.

The online application, available at www.rational-golf.com, creates a model of the golfer swinging each of his or her clubs and thereby determines the optimum weight for each club.  The target weight is achieved by adding a specific proprietary weight inside the shaft at the grip end of each club.  BioMatch is the last step in the club fitting process. 

Once the weights are installed the golfer´s game will improve effortlessly as he or her now only have to ingrain one swing in the subconscious mind.  Steering of the club is no longer necessary and is discouraged.  The method provides significantly better accuracy and slightly more distance to golfers at all levels.  BioMatch is a must have for any golfer who cares about their scores, or even the enjoyment of the game.

BioMatch replaces the arbitrary Swingweight method of matching golf clubs.  The more scientifically inclined golf professionals do understand the problems the outdated Swingweight method creates and are searching for new solutions.  One such example is Bryson DeChambeau's single length irons.  Entering the properties of the single length irons into the BioMatch algorithm proves that his Irons are matched.  BioMatch achieves the advantages of the single length irons without the disadvantages of the single length irons such as reduced accuracy with the “short” irons and lack of distance and height with the “long” Irons.  Besides, the other clubs in DeChambeau's set are not matched to his single length irons.  BioMatch matches all the clubs in your set.  The putter is the only exception.  As the putting stroke is a completely different motion, it does not interfere with the subconscious routine of swinging the other clubs.

Designer Golf Ltd, located in Daventry just north of London, is now trained and fully equipped to implement the patented BioMatch method to its customers.  Steve Low, Managing Director of Designer Golf Ltd, was stunned by the results that BioMatch brought and grabbed the opportunity to become the UK Distributor with both hands: “After applying the method to my clubs I was shocked to see the dispersion, or lack of such, shown on my Flightscope.  Designer Golf is now set to revolutionize the club fitting business in the United Kingdom and welcomes customers from all over Europe”.

The founder of Rational Golf LLC of Florida and inventor of the BioMatch system, Gisle Solhaug, is excited to work with Designer Golf as he will be able to serve golfers in the UK better.  The cooperation with Designer Golf will be used as a model for how Rational Golf will appoint and work with distributors worldwide.

Golfers are welcome to learn more at www.rational-golf.com.  Club fitters in Europe should contact Steve Low, club fitters outside Europe should get in touch with Gisle Solhaug.

Rational Golf LLC is seeking investors to accelerate growth.

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BioMatch on Top

Jim Cai Wins the Hurricane Junior Golf Tour National Championship with BioMatch

Jim Cai, representing China, won the 2016 Hurricane Junior Golf Tour National Championship for Boys 14 -16 at the Champions Gate National Course in Orlando.  Jim shot three over par (75) on the final day under windy conditions for a total of 147 for the competition on the 6529 Yard course.  Jim beat Artem Yalovenko on the first playoff hole.  Brett Reid of Minnesota, another BioMatch player, won the third place only one shot behind.  The other two BioMatch players in the 89 strong field played well.  Tamerlan Bashikov of Kazakhstan shot 151 for the tournament for an 8th place.  Gregory Solhaug of Norway ended up in 17th place with a total score of 153.

BioMatch is a scientific way of matching golf clubs provided by Rational Golf LLC of Bradenton, Florida. The method is available for all on www.rational-golf.com.  Once a set of clubs is matched to the player he or she can apply the same consistent swing to all the clubs in the set. This increase accuracy, consistency, and distance throughout the set of clubs

From left to right: Gregory Solhaug, Jim Cai, and Brett Reid.

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BioMatch, The Holy Grail of Golf

By Gisle Solhaug |

Proper fitting of golf clubs is critical.  However, the Holy Grail of club building has always been to make a set of clubs in which the golfer can apply the same consistent swing to all the clubs.  Swingweight was introduced as a solution to this problem almost a hundred years ago.  Since then the industry has given up on finding a scientifically sound way of matching golf clubs.  BioMatch is the only scientific solution to matching your golf clubs within the set and to your body.  After applying BioMatch, you will effortlessly increase your accuracy and distance.  Club Fitters should implement BioMatch as the final step in the fitting process.  Golfers can easily implement BioMatch to their golf clubs at the Rational Golf website.

The moment of inertia around the center of the grip is measured using the MOIG instrument, or the BioMatch program will estimate it for you based on the other properties of the clubs. The club data is entered in the BioMatch algorithm online together with the golfer's height, weight, and fat percentage.  The website will then build a model of the golfer swinging each club and thereby calculate the optimum weight to be added to the grip end of each club.  Once the weights are installed the golfer´s game will improve effortlessly as accuracy and distance are improved.  Weights are easily installed using the Shaft Access Tool.

As you now only have to learn and ingrain one consistent swing in your subconscious mind, you will find the game much easier to play.  If you have been absent from the game for a while, you will be able to pick it up again much faster.  Tiger Woods comes to mind as someone’s life BioMatch would change if given the opportunity.  Golfers at any level will benefit from BioMatch.  If you play for money, or you are keen on improving your game, it is a no-brainer.

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ThreeTwelve Creative Wins Davey Award for Rational Golf

Strong art direction and design, coupled with effective messaging and copywriting, earns ThreeTwelve Creative a 2016 Davey Award.


Rational Golf owner, engineer and inventor Gisle Solhaug invented a proven scientific method of helping golfers to improve their game -- and then came to ThreeTwelve Creative for help in developing the Rational Golf branding and web application that would bring his method of matching golf clubs to golfers everywhere.

Read the whole story

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I am talking about the picture of the beautiful club-fitting studio with all the latest technologies in club heads and shafts.  Then on the table is a Swingweight Scale!  What a waste of time, money and technology.  This instrument is preventing every golfer from reaching his or her potential.  Instead, the Mass and MOI of each of your clubs should be optimized to fit your body.  Then your subconscious mind only has to ingrain one swing rather than 13.  This patented technology, named BioMatch, is now available to every golfer online and it is easily applied to your existing clubs.  Your game will improve effortlessly as accuracy and distance increase.

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Single Length Irons Vs. BioMatch

BioMatch; Best of Both Worlds

There are disadvantages, as well as advantages, of having all the clubs the same length.  When all your clubs have the same mass, moment of inertia, and length you can apply the same consistent swing to all your clubs.  Being able to use the same swing for all your clubs is a huge advantage.  However, your "shorter" clubs will be less accurate, and your "longer" clubs will have a lower than optimal ball flight as compared to a standard set of club.  BioMatch gives you the best of both worlds.  You keep your standard length clubs while still being able to apply the same swing to all your clubs.  And I mean all your clubs, not just your irons, as is the case with the single length irons.

The current popularity of single length irons proves that there is a need for matching of golf clubs.  BioMatch fills this need without the golfer having to buy new clubs, and it does so for all the clubs in the bag.

BioMatch gives you more distance on every club as well as deadly accuracy with every club in the bag.  BioMatch is easily applied to your existing clubs by installing the recommended size of weight to the grip end of your clubs.  The patented BioMatch application builds a model of your body swinging each of your clubs.  Thereby, determining the optimum weight to be added to each of your clubs for your body, hands, and clubhead to be synchronized at impact.  Your game will improve, effortlessly, once you have installed the weights.

See www.rational-golf.com for details.

BioMatch Weights

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