Legendary golf instructor Harvey Penick compared the sequence of a golf swing to that of lopping off the heads of dandelions with a weed cutter to convey the right sensation to his students.
Many of us still rely on conjuring up mental images of swinging buckets of water or clipping weeds to train our bodies to produce the best golf swings of which we are physically capable. But whether or not we flush it every time, or have those rounds where we’re just flushing it away, it’s important to know what we’re doing correctly or incorrectly in order to play our best golf more often.
The Golf MTRx application for iPhone, by Zeroline Golf, is a portable and sophisticated tool that records your swing and translates the kinematic sequence of your pelvis into data you can use to better understand how your body functions when it swings a club.
The Golf MTRx app is the first mobile technology that measures the efficiency of a golfer’s pelvis to generate a powerful and repeatable swing. Your individual kinematic signature is compared to pro tour averages and produces a score (a maximum of 100) based on four components: acceleration, deceleration, peak time and speed.
As described on Zeroline Golf’s website, the four factors that promote an efficient use of the pelvis are:
- Acceleration: A golfer must have proper acceleration to achieve the necessary deceleration as the upper body begins to fire. Acceleration should ideally be about 2.0 kd/s/s (thousand degrees per second per second) and will show on the Golf MTRx chart as a good steady steep slope going from zero to peak speed.
- Deceleration: Happens when the torso, arms and club start to engage on the downswing. The upper body puts pressure on the lower body and the pelvis will stabilize as the upper body fires. The pelvis should decelerate at the same rate or greater than the acceleration. Deceleration is necessary to achieve good peak time.
- Peak Time: The place in time that the pelvis reaches peak speed on the downswing. Peak time needs proper acceleration and deceleration. The “ideal” peak time is about 60 percent through the down swing to impact — that’s measured in time, not degrees of rotation. Golfers need good peak time for the segments above to rip it.
- Speed: Measured in degrees per second. Speed is an important component, but it can often be a side effect of the categories listed above. Speed matters most early in the kinetic chain.
In layman’s terms, the Golf MTRx app decodes the conditions necessary for your body to produce good shots, and give golfers a tool they can use to correct their physical mistakes on bad shots. It’s what Zeroline Golf Co-Founder and Chief Technology Officer Steve Blake calls “measuring a feel,” or giving golfers specific information about what they did or didn’t do during a swing.
“From my software experience, I knew the iPhone had motion sensors, a microphone and great graphics,” said Blake. “We concluded that having an app that could measure hip movement would be possible, and that we could develop it into a great training aid for coaches and golfers … We also thought it would be helpful for a golfer to be able to save information from that ideal swing to serve as a baseline from which to compare and improve.”
The Golf MTRx app underwent rigorous field testing with golfers of various levels and abilities prior to its December 2012 launch. It was also introduced to coaches from a wide variety of philosophies and backgrounds.
“The beta testing included the participation of coaches, and we think this has impacted the positive reaction from the coaching community — even from instructors who are resistant to the use of technology in golf,” Blake said.
In terms of the data itself, Blake built a wooden swing testing device that allowed him set exact turn angles and impact positions, which aided him in validating the consistency of the reported readings. The swing recognition algorithm was tested against thousands of swings to eliminate false positives. Independent tests were performed against K-VEST and AMM (Advanced Motion Measurement Golf Swing Analysis Training System) with very good results.
The ideal numbers that all users of Golf MTRx ultimately compared themselves to came from research and conversations Zeroline Golf had with experts at Titlelist Performance Institute and K-VEST. The tour pro averages for acceleration, deceleration and speed are modeled after a male swinging a 5-iron.
The Golf MTRx app can be used with any club in the bag, but users will notice differences in their score and variations for acceleration, deceleration and speed. My own experience with the app reveled that my acceleration and speed increased as I went from wedges to woods.
Ideally, peak time should stay the same indicating that the golfer is stabilizing properly for all of his or her clubs. In my case, the peak time varied from club to club, which helped me realize that my swing isn’t as consistent as I would like it to be throughout the bag. Chances are, a lot of golfers will find distinguishable quirks in their swings. The Golf MTRx app isn’t designed to necessarily fix issues in your swing, but it can go a long way in helping to identify areas to improve upon.
First and foremost, the Golf MTRx app is easy to use. A profile takes seconds to create and the app allows you to create multiple profiles — useful if you and a friend want to take turns recording your swings and compare results.
Once your profile has been setup, click the record and analyze button, followed by the “Start Recording” button at the bottom of the application screen. At this point you’re ready to secure your iPhone to your hip. Zeroline Golf recommends that you fasten it under your belt with the iPhone top down. As far as accurate measurement goes, I found the app performed best when my iPhone was held snug against my hip or behind me near the base of my spine.
You can make practice swings in record mode. The Golf MTRx app will only record your swing when pronounced contact is made with either turf or ball. If you have the volume turned up (highly recommended), the app will emit a “ping” when your swing has been successfully recorded. Double tap the “stop” button and you’re ready to review your kinematic swing sequence and your Golf MTRx score.
The swing analysis screen will provides charts, animations and recommended drills to help you make sense of all the data. The score tab will provide you with a quick snapshot of your performance for all four components of your MTRx score: acceleration, deceleration, peak time and speed. The current version of the app is limited to comparing your values to those of a tour pro. A planned update to the app will allow a user to not only set their baseline swing, but to adjust the values up or down for acceleration, deceleration and speed — essentially allowing yourself to set your own bar for peak performance.
Undoubtedly, gear heads will find plenty of useful metrics to dive into within the MTRx and Chart tabs of the application. The MTRx tab allows you to play an animation of your swing sequence so that you can see how your pelvis is storing and releasing energy through impact. The Chart complements the MTRx tab by plotting your sequence as a bar chart. Both tabs tell you how much your hips are rotating during the backswing, impact and follow through.
Zeroline Golf has placed a lot of attention upon the four pivotal components that make up a golfer’s MTRx score, but a lot less has been said about hip rotation and tempo. Apparently, I wasn’t the only user of the app who found the information about hip rotation confusing. The latest version of the app (v. 1.5) has added an assessment feature that compares your hip rotation in the backswing to the recommended range which is -25 to -45 degrees. The recommended range for impact is said to be 15 to 40 degrees.
“Too little rotation indicates poor separation of hips and shoulders and results in loss of power,” says Blake. “Too much rotation at impact is hard to quantify; it is up to the individual’s capability. Rory McIlroy has his hips at 62 degrees at impact. I’m lucky to get to 40 degrees.”
The best way to get a better understanding of the role hip rotation plays in your own kinematic sequence is to record multiple swings and experiment with the intended result. Likewise, tempo also plays a role in bio-mechanic efficiency, but there isn’t enough data on the subject to declare an ideal measurement.
“Studies like Tour Tempo measure the club tempo, not that of the hips,” says Blake. “As a result, we do not place a great emphasis on tempo. The app will report the numbers regardless of the tempo. This is another data point that varies depending on a golfer’s physical capabilities and limitations. In my own experiments, I find a slower tempo works better for me, but I’m 62. We have seen lots of young golfers with quick tempos who crush the ball.”
The most underrated feature of all is that the Golf MTRx app is swing agnostic. It doesn’t care if you are a practitioner of Stack and Tilt or a more traditional approach; whether your swing tempo is reminiscent of Rickie Fowler or Ai Miyazato.
If you are an owner of an Android-powered phone, consider yourself out of luck. The Golf MTRx app is available for iPhone only and the differences in hardware among Android devices ensure that porting the app will remain a less than straightforward process. An Android-specific version remains high on Zeroline Golf’s to do list, but as of right now there is no timetable for releasing one.
Another major complaint heard among some users is about the price. Golf MTRx retails for $29.99 in the App Store — comparatively more expensive than most iPhone applications. If you’re on the fence about the price, Zeroline Golf will be releasing a light version of the app called Golf MTRx LT that will retail for $9.99. The LT edition has many of the same features but will only allow a golfer to create a single profile and record up to 18 swings at a time. It is designed with the novice to intermediate golfer in mind.
Serious golfers who are obsessed about their training and their gear aren’t going to be put off by the price for the full app, which delivers a wealth of data at a fraction of the cost of professional swing analyzers. Kudos to the Zeroline Golf team for bringing high performance and accurate motion analysis data to the masses in a handy mobile application. Still, fans of the app shouldn’t lead themselves to believe they are using a tool on par with K-VEST which uses sensors on the pelvis, upper body and lead wrist to capture 2D video and 3D motion. Golf MTRx is limited to a single sensor and cannot relay any information about the upper body or club head.
Truth be told, a lot of golfers are better off with less information at their fingertips. Even with some obvious limitations, the Golf MTRx app might be too overwhelming for some users. What does it really mean to the average golfer if their peak time falls short of the gold standard? Are certain numbers more important to hit than others?
Credit Zeroline Golf for thinking strategically ahead about those of us who may go plummeting down the rabbit hole of misinformation and confusion. Its website now features a directory with a growing list of coaches including GolfWRX frequent contributors, Monte Sheinblum and Dan Carraher. Instructors like Carraher who have openly endorsed the app view it for what it is – a training aid that complements their teaching approach.
“Because the app like any tool, similar to a mirror or camera, is useless without the proper knowledge,” Carraher said. “Students tend to see the same success rate regardless of using it or not. Success is usually based on the work ethic and aptitude for repetitive practice more so than any tool. But I also feel as long as the student knows what to look for more information isn’t a bad thing. It’s not knowing what is relevant and trying to play connect the dots that deters progress.”
The Bottom Line
The Golf MTRx application earns high marks for innovation, ease of use and value. Whether or not golfers can stand to benefit from charting their swings comes down to a personal choice. We have all known golfers, including some at the very highest professional level, who have fallen in love with statistics and are fixated on improving their swings to the detriment of all other components that make up the game of golf.
“If you try to swing to a picture on camera or swing to make the numbers [look] good you are losing sight of what is important — the actual causes and hitting the golf ball at a target,” Carraher said. “Playing golf is more than just a pretty swing or good numbers on a screen, be it TrackMan or Golf MTRx. Golf is played in ever- changing imperfect conditions on an imperfect surface by human beings. It’s more about learning your tendencies and planning around them, than trying to eliminate every bad tendency and hit perfect shots.”
Perhaps it goes without saying, but just like those of us who prefer not to dissect themselves on video, there’s a segment of golfers who are best left to using their imagination and creativity to fuel their swings and fix any ailments. Golf MTRx would probably feel right at home for detail-oriented strategists like Nick Faldo and Stacy Lewis, but not so much for shot-making savants like Bubba Watson or the late Seve Ballesteros.
Most of us fall in line somewhere in between these opposite extremes and take on multiple, sometimes incompatible approaches to get better. I don’t find it all odd to fixate my mind on an image of a swinging bucket if I know it helps me groove a smoother takeaway, while I rely on an app to monitor my hip rotation and peak time. Golf MTRx doesn’t negate the respected teachings of a Harvey Penick; if anything, it supports his theories with science.
“We were concerned that some coaches would see the emergence of this technology as a threat to their livelihood, but the instructors who have used Golf MTRx have reported that it has supplemented their instruction and is another effective tool they can use with students,” Blake said. “Some have said that the app has allowed them to convince students of points they have been making for months, since there is concrete data that the coach can show them. We also hope that Golf MTRx will serve as an enabler of biomechanics by putting low cost technology in the reach of many golfers. If ‘Joe Golfer’ is able to ‘measure a feel’ and understand what his body is doing when he hits that great shot, we believe that Golf MTRx will have served its purpose.”
Top-3 men’s golf polos at the 2018 PGA Fashion Show in Vegas
GolfWRX’s fashion expert Jordan Madley picks her top-3 favorite men’s polo shirts from the recent 2018 PGA Fashion Show in Las Vegas. Enjoy the video below!
I tried the great Golfboarding experiment… here’s how it went
Corica Park Golf Course is not exactly the first place you’d expect to find one of the most experimental sports movements sweeping the nation. Sitting on a pristine swath of land along the southern rim of Alameda Island, deep in the heart of the San Francisco Bay, the course’s municipal roots and no-frills clubhouse give it an unpretentious air that seems to fit better with Sam Snead’s style of play than, say, Rickie Fowler’s.
Yet here I am, one perfectly sunny morning on a recent Saturday in December planning to try something that is about as unconventional as it gets for a 90-year-old golf course.
It’s called Golfboarding, and it’s pretty much exactly what it sounds like: an amalgam of golf and skateboarding, or maybe surfing. The brainchild of surfing legend Laird Hamilton — who can be assumed to have mastered, and has clearly grown bored of, all normal sports — Golfboarding is catching on at courses throughout the country, from local municipal courses like Corica Park to luxury country clubs like Cog Hill and TPC Las Colinas. Since winning Innovation Of the Year at the PGA Merchandising Show in 2014, Golfboards can now be found at 250 courses and have powered nearly a million rounds of golf already. Corica Park currently owns eight of them.
The man in pro shop gets a twinkle in his eyes when our foursome tells him we’d like to take them out. “Have you ridden them before?” he asks. When we admit that we are uninitiated, he grins and tells us we’re in for a treat.
But first, we need to sign a waiver and watch a seven-minute instructional video. A slow, lawyerly voice reads off pedantic warnings like “Stepping on the golfboard should be done slowly and carefully” and “Always hold onto the handlebars when the board is in motion.” When it cautions us to “operate the board a safe distance from all…other golfboarders,” we exchange glances, knowing that one of us will more than likely break this rule later on.
Then we venture outside, where one of the clubhouse attendants shows us the ropes. The controls are pretty simple. One switch sends it forward or in reverse, another toggles between low and high gear. To make it go, there’s a throttle on the thumb of the handle. The attendant explains that the only thing we have to worry about is our clubs banging against our knuckles.
“Don’t be afraid to really lean into the turns,” he offers. “You pretty much can’t roll it over.”
“That sounds like a challenge,” I joke. No one laughs.
On a test spin through the parking lot, the Golfboard feels strong and sturdy, even when I shift around on it. It starts and stops smoothly with only the slightest of jerks. In low gear its top speed is about 5 mph, so even at full throttle it never feels out of control.
The only challenge, as far as I can tell, is getting it to turn. For some reason, I’d expected the handlebar to offer at least some degree of steering, but it is purely for balance. The thing has the Ackerman angle of a Mack Truck, and you really do have to lean into the turns to get it to respond. For someone who is not particularly adept at either surfing or skateboarding, this comes a little unnaturally. I have to do a number of three-point turns in order to get back to where I started and make my way over to the first tee box.
We tee off and climb on. The fairway is flat and wide, and we shift into high gear as we speed off toward our balls. The engine had produced just the faintest of whirrs as it accelerated, but it is practically soundless as the board rolls along at full speed. The motor nevertheless feels surprisingly powerful under my feet (the drivetrain is literally located directly underneath the deck) as the board maintains a smooth, steady pace of 10 mph — about the same as a golf cart. I try making a couple of S curves like I’d seen in the video and realize that high-speed turning will take a little practice for me to get right, but that it doesn’t seem overly difficult.
Indeed, within a few holes I might as well be Laird himself, “surfing the earth” from shot to shot. I am able to hold the handlebar and lean way out, getting the board to turn, if not quite sharply, then at least closer to that of a large moving van than a full-sized semi. I take the hills aggressively (although the automatic speed control on the drivetrain enables it to keep a steady pace both up and down any hills, so this isn’t exactly dangerous), and I speed throughout the course like Mario Andretti on the freeway (the company claims increased pace-of-play as one of the Golfboard’s primary benefits, but on a Saturday in the Bay Area, it is impossible avoid a five-hour round anyway.)
Gliding along, my feet a few inches above the grass, the wind in my face as the fairways unfurl below my feet, it is easy to see Golfboards as the next evolution in mankind’s mastery of wheels; the same instincts to overcome inertia that brought us bicycles, rollerblades, scooters, skateboards, and more recent inventions such as Segways, Hoverboards and Onewheels are clearly manifest in Golfboards as well. They might not offer quite the same thrill as storming down a snowy mountainside or catching a giant wave, but they are definitely more fun than your standard golf cart.
Yet, there are obvious downsides as well. The attendant’s warning notwithstanding, my knuckles are in fact battered and sore by the time we make the turn, and even though I rearrange all my clubs into the front slots of my bag, they still rap my knuckles every time I hit a bump. Speaking of which, the board’s shock absorber system leaves something to be desired, as the ride is so bumpy that near the end I start to feel as if I’ve had my insides rattled. Then there is the unforgivable fact of its missing a cup holder for my beer.
But these are mere design flaws that might easily be fixed in the next generation of Golfboards. (A knuckle shield is a must!) My larger problem with Golfboards is what they do to the game itself. When walking or riding a traditional cart, the moments in between shots are a time to plan your next shot, or to chat about your last shot, or to simply find your zen out there among the trees and the birds and the spaciousness of the course. Instead, my focus is on staying upright.
Down the stretch, I start to fade. The muscles in my core have endured a pretty serious workout, and it’s becoming increasingly difficult to muster the strength for my golf swing. It is no coincidence that my game starts to unravel, and I am on the way to one of my worst rounds in recent memory.
Walking off the 18th green, our foursome agrees that the Golfboards were fun — definitely worth trying — but that we probably wouldn’t ride them again. Call me a purist, but as someone lacking Laird Hamilton’s physical gifts, I’m happy to stick to just one sport at a time.
Review: The QOD Electric Caddy
If you want an electric golf caddy that doesn’t require that you wear a sensor or carry a remote — one that will be reliable and allow you to focus on your game, and not your cart — then the Australian-manufactured QOD is worth checking out.
The QOD (an acronym for Quality of Design and a nod to its four wheels) is powered by a 14.4-volt lithium battery, good for 36 holes or more on a single charge. It has nine different speeds (with the fastest settings moving closer to jogging velocity) so the QOD can handle your ideal pace, whether that be a casual stroll or a more rapid clip around the course.
The QOD is also built to last. Its injection-molded, aircraft-grade aluminum frame has no welded joints. Steel bolts and locking teeth take care of the hinging points. The battery and frame are both guaranteed for three full years. If you need a new battery after the three-year window, the folks at QOD will replace it at cost.
Its front-wheel suspension gives the QOD a smooth ride down the fairway, and the trolley is easy to navigate with a gentle nudge here and there. The QOD is always in free-wheel mode, so it is smooth and easy to maneuver manually in tight spaces and around the green.
The caddy also features three timed interval modes for situations where you might wish to send it up ahead on its own: when helping a friend find a lost ball or when you will be exiting on the far side of the green after putting, for example. The clip below includes a look at the caddy in timed mode.
Another area where the QOD excels is in its small size and portability. When folded, it measures a mere 17-inches wide, 15-inches deep and 12-inches tall, making it the smallest electric caddy on the market.
Folks Down Under have been enjoying the QOD for some time, but it wasn’t until a few years ago when Malachi McGlone was looking for a way to continue walking the course without putting undue strain on an injured wrist that the QOD found U.S. fairways. After first becoming a satisfied customer, McGlone convinced CEO Collin Hiss, who developed the product and oversees its production in Australia, to allow him to distribute and service the QOD here in the states.
The QOD has no self-balancing gyroscope, bluetooth sensor or remote control. Bells and whistles just aren’t its thing — though it does have a USB port for cell phone charging that can come in handy. However, if you are looking for a no-fuss workhorse to move your bag down the fairway, the QOD should be on your radar.
The 2018 model has begun shipping and will be on sale at $1,299 for a limited time. It normally retails at $1,499.
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