








Polar Vantage M3
You want something smart but sporty, compact but powerful, stylish but strong. You want to train harder but recover faster; sleep better but explore more. You want pro-level sports tracking but everyday lifestyle features. You want a Polar Vantage M3: the multi-sport watch for multi-sport athletes.
Polar Grit X2 Pro Titan
Polar Grit X2 Pro Titan is a rough and rugged outdoor sports watch crafted for adventure with sapphire glass AMOLED display in titanium casing, and a hi-tech toolkit of navigation and performance features for exploring the wonders of the world, and the body.
Polar Grit X2 Pro
Polar Grit X2 Pro is a rough and rugged outdoor sports watch crafted for adventure with sapphire crystal glass AMOLED display, and a hi-tech toolkit of navigation and performance features for exploring the wonders of the world, and the body.
Polar Vantage V3
An ensemble of biosensing instruments, AMOLED display, dual-frequency GPS, maps, and the most comprehensive suite of training and recovery tools on the market. The stage is set, and the Polar Vantage V3 smart sports watch is ready to put in the performance of a lifetime.
Polar Ignite 3
Polar Ignite 3 is a stylish fitness & wellness watch that helps you live a more energized life. It tracks your sleep, activity, and heart rate to provide guidance thatās tailored to your body and lifestyle.
Polar Ignite 3 Braided Yarn
Polar Ignite 3 Braided Yarn is a stylish fitness & wellness watch that helps you live a more energized life. It tracks your sleep, activity, and heart rate to provide guidance thatās tailored to your body and lifestyle and comes with a soft, light, and extremely comfortable woven fiber wristband.
Polar Pacer Pro
Polar Pacer Pro is an ultra-light, new-generation sports watch with integrated barometer that equips athletes with advanced tools to improve running economy, training sessions, and sports performance.
Polar Pacer
Sport is play ā why complicate it? Polar Pacer is a no-nonsense sports watch that gives new athletes all the essentials, plus the specialized training tools they need to train better.
Polar Vantage V2
A powerful convergence of minimalist design, innovative technology, and intelligent training and recovery tools makes the Polar Vantage V2 a formidable sports watch.
Polar Grit X Pro
Built for military-level durability with sapphire glass and ultra-long battery, equipping you with new navigation tools, always-on outdoor features and Polar's ultimate training solutions.
Polar Vantage M2
Designed for function, the Polar Vantage M2 works as hard as you do. Our industry-leading technology is here to help you reach your goals and come back stronger. For that athlete attitude.
Polar Ignite 2
A fitness watch thatās sleek, simple and smart? Polar Ignite 2 is a true triple threat. Versatile and full of great features, itās the perfect companion for any sport and any lifestyle.
Polar Ignite
A waterproof fitness watch with advanced wrist-based heart rate and integrated GPS, Polar Ignite offers you a full view of your day and guides you towards a more balanced life.
Polar Unite
A beautifully simple watch with personalized daily workout guidance, 24/7 heart rate and activity tracking, plus automatic sleep and recovery applications.
Polar Vantage V
Polar Vantage M
An all-round multisport & running GPS watch for anyone who loves setting new records. Polar Vantage M is a slim, lightweight training companion that gives you all the data you need to improve your performance.
Polar Grit X
An outdoor multisport watch with rugged yet lightweight design, ultra-long battery life and military-standard durability for anyone who prefers the trails over the roads.
Polar M430
A GPS running watch with wrist-based heart rate, advanced running features and Polar Running Program, Polar M430 is a top-level watch for runners who want more.
Polar Verity Sense
When freedom of movement is important to you, Polar Verity Sense is your go-to choice for any sport.
Polar H10
Widely regarded as the gold standard in wireless heart rate monitoring, this is the most accurate sensor in Polarās history.
Polar H9
A reliable, high-quality heart rate chest strap for all your everyday sports with BluetoothĀ® and ANT+ connectivity. Get connected and get going.
Polar OH1+
Polar OH1+ is an optical heart rate monitor that combines versatility, comfort and simplicity. You can use it both as a standalone device and pair it with various fitness apps, sports watches and smart watches, thanks to BluetoothĀ® and ANT+ connectivity.
Wristbands
Personalize any watch for any style and any need.
Straps
Replace or upgrade your Polar Sensor chest straps or arm bands.
Power & Cables
For charging your products and data transfer.
Mounts & Adapters
Adapt your product for any situation.
[menu_title:HOVER_PANEL_WHO_WE_ARE]
[menu_copy:HOVER_PANEL_WHO_WE_ARE]
[menu_title:HOVER_PANEL_SCIENCE]
[menu_copy:HOVER_PANEL_SCIENCE]
Polar Grit X Outdoor Series
Made for outdoor sports and built to handle any environment nature can throw at you, Grit X watches are designed to help you explore the world and gear up for adventure.
Polar Vantage Performance Series
Our flagship series is tailored for high-performance and endurance sports and training. Every aspect of our Vantage watches are designed with one particular person in mind ā the athlete.
Polar Pacer Multisport Series
The Pacer Series gives athletes all the essentials such as accurate GPS and precise heart rate tracking, plus the specialized training, sleep, and recovery tools they need to train better.
Polar Ignite Fitness & Wellness Series
Sleek, simple, and smart ā Ignite watches are the perfect partner for any fitness goals and any lifestyle.
Author(s): Eduardo Alonso
In 2023, ultrarunner Karel Sabbe cemented his place in history by conquering the legendary Barkley Marathonsāa race that only a handful of people have completed in nearly four decadesāand setting a new fastest known time on the Pacific Crest Trail. In this story from the Polar archives, we revisit how Sabbe achieved one of the greatest years in ultrarunning history.
What areĀ yourĀ limits? When ultra-runner Karel Sabbe stood at the starting line of the Barkley Marathons earlier this year, he was prepared to confront this question head-on. He understood that he was about to test the boundaries of his physical and mental endurance. Over the next three days, deepĀ in aĀ forestĀ east of Knoxville,Ā Tennessee, he was going to experience extreme fatigue and exhaustion, sleep depravation and hallucinations, muscle damage, enormous blisters, and aching ligaments.
This being his third participation, Sabbe was well aware of what awaited him. Firmly convinced that he would not find the will to train for it again, this year was his last chance to complete the legendary race. He had unfinished businessĀ and nothing else that finishing this race would satisfy him.
Many consider the Barkley Marathons to be the most brutal, toughest foot race in the world. Runners must complete five loops of the 20+ mile, off-trail course for a total of 100 miles with 63,000 feet of accumulated vertical climb. Day and night, without the help of GPS trackers, phones or course markings, they must run non-stop to complete the race inside the 60-hour cutoff. In nearly four decades, less than 20 men have completed the full, five-loop race. The dropout rate is 99%. Itās a race set up for failure.
For Karel Sabbe, a man who can run the 1,646 miles of Via Alpina in the Alps faster than anyone, the Barkley is a unique opportunity to explore the limits of his body and mind. āIām not very interested in competing against others or winning races,ā he admits. āFor me, ultra running is about the personal challenges, about exploring my physical and mental limits. When Iām out there, chasing a faster know times, I donāt look at what others have done. Instead, I ask myself, āwhat am I capable of today?ā And, what am I capable of doing tomorrow? I push myself to find out the answer to these question, to find out my own limits.ā
āFor me, ultra running is about the personal challenges, about exploring my physical and mental limits. When Iām out there, chasing a faster know times, I donāt look at what others have done. Instead, I ask myself, āwhat am I capable of today?ā And, what am I capable of doing tomorrow? I push myself to find out the answer to these question, to find out my own limits.ā
Over the course of his career, Karel Sabbe, a 34 year old dentist from Belgium, has proved to be one of the best ultra runners in the world. Heās set speed records and fastest known times on the Via Alpina, the Appalachian Trail (completing the 2,189-mile trail in less than 42 days), the Pacific Crest Trail, and Bigās Backyard Ultra (running 4.1 mile loops for 75 hours). When heās out there running, heās gone for days. Running 60 miles every day for weeks is the norm. So far, every challenge heās taken has been an extraordinary achievement and accomplishment. Except the Barkley Marathons. Did he find his limits there?
***
Resting in a tent, waiting for the Barkley to commence, Karel savored the final moments of respite, trying to conserve every ounce of energy. He knew that steep inclines and unforgiving terrain lied ahead.
His training cycle leading up to this yearās Barkley Marathons involved crucial adjustments. Recognizing downhill running as one of his weaknesses, Karel devoted himself to getting strong and improving in this area. As he resides in his home country of Belgium, substantial hills where to run downhill for a long period of time arenāt exactly near. There was only one thing he could; he embarked on a training camp in Gran Canaria, Spain. Free from the need to juggle work and training, he fully immersed himself in rigorous training. Over the course of a week, he was able to replicate the challenging terrain he would encounter in Tennessee weeks later, training on the thills for nearly ten hours every day. After training, he read race reports and studied the maps, trying to anticipate every decision he would need to take during the race.
The Barkley Marathons is a race unlike any other. The route and its intricate specifics are kept top secret, and even the entry procedure remains obscure and mysterious. To secure a spot among the 40 selected runners, participants must email the race director and mastermind, Gary āLazarus Lakeā Cantrell, on a designated day, providing an essay outlining the reasons why they should be chosen.
The race can start anytime between midnight and noon, so participants wait at the camp for Lazās signal, resting, eating, trying to study the maps one more time, and most importantly, trying to stay calm. One hour before the start Laz blows a conch: itās time to get ready.
This time, Laz opted for a late start, granting Karel the luxury of an extra long nightās sleep. At 8:54am Laz blew the conch at 8:54 am and sixty minutes he sent the competitors on their way by symbolically lighting his cigarette.
And so, they ran.
***
Enjoying this article? Subscribe to Polar Journal and get notified when a new Polar Journal issue is out.
Becoming an ultra runner superstar wasnāt Karel Sabbeās plan. Before smashing trail running records, he worked hard to complete dental college. That was his calling. At university, while friends partied and enjoyed student life, he pored over books and tenaciously studied. Exhausted and frustrated, he planned an escape.
Right after university, Sabbe traveled to New Zealand. Alone and without a phone to connect with anyone, he immersed himself in nature and embraced solitude. For weeks, he lived in an isolated cabin, eating simple foods, reading old books, and running until positive thoughts returned. He realized he didnāt want to be the loner in the woods. It was time to go back home.
***
Polar Grit X2 Pro Titan is a rough and rugged outdoor sports watch crafted for adventure with sapphire glass AMOLED display in titanium casing, and a hi-tech toolkit of navigation and performance features for exploring the wonders of the world, and the body.
No journey is worth taking without a few bumps in the road. On his way to Tennesseeās Frozen Head State Park, where the Barkley is held annually, Sabbe fell ill. After many months of hard training, his immune system was weakened . āNobody arrives to the Barkley feeling 100%,ā he explains. āThe training before the race is so tough that itās easy to get sick or have a small injury. The only thing I could do was to stay calm and minimized the impact of the illnessā.
Waiting for the Barkley Marathons to start, Karel is well-rested after sleeping over 12 hours the night before. Itās an extremely cold Tuesday in March; flakes of snow have been falling on and off all night. Chilled to the bone and fearing freezing conditions, Karel decided to put on a few extra layers of clothes.
āThat was a problem. I was wearing too much so soon I started to feel dehydrated. I was sweating too much. My running vest was too small so I couldnāt pack my clothes aways and, of course, youāre not allowed to just leave them on the trail. I had to keep wearing them and by the end of the first loop, I was soaked in sweat. Fortunately, during the next loop, at night, I could recover and started drinking more and had salts and electrolytes.ā
As expected, the race was again unforgiving. After the second loop, only 14 participants remained in the competition. Seconds after completing the loop, Karel plopped down on a camping chair, barely moving to take off their socks and shoes and reached for fresh ones. Heās been running in the woods for over 20 hours. Forty more to go. He looked around, put his feet in water, and breathed.
With participants out there running for hours and hours, one might think that running the Barkley is a solo effort, but thatās far from truth. Participants might be out in the forest running for eight to twelve hours running without support. However, between loops, they have the opportunity to be with their crew, who provides a tremendous help. For a man who once sought solace in solitude, during these breaks, Karel must blindly rely on others.
The person who Karel trusted most waited at the camp. Joren Biebuyck, his longtime aide and brother-in-law, was there. From the Pacific Crest Trail to the Alps to Barkley, Joren was there, helping with the maps, preparing the backpacks, and offering the right words of encouragement. He and Karel share such a remarkably close relationship. āI probably couldnāt do this with anybody else,ā admits Karel. āHeās been with me in every adventure and knows my strengths and weaknesses so well..ā
This exceptionally tight bond helps Karel Sabbe break barriers. While others might have doubts and consider quitting, Joren understands Karelās ability to persevere and push forward. āIf my knee is hurting, he can say, āOf course, Karel, your knee is hurting. Youāve just completed three loops at Barkley. But now, you have to get out there again and keep going. Otherwise, youāll regret it forever.ā Joren can say that because he knows what I am capable of.'ā
Five minutes into the third loop, Karel tumbled into a frozen river. It was cold and wet after that, he laughs now. Any minor mishap could potentially remove Karel from the race. It happened before. After being dropped out in the fourth loop on his first participation at the Barkley, in 2022, Karel again attempted a fourth loop, but become disoriented and started having hallucinations. He wandered off the course and got lost until local policed returned him to the camp.
Dealing with the disappointment of failing twice at the Barkley wasnāt easy. āI was very hard on myself, so I took nearly six months off. Almost a year later, I was still disappointed on the bad decisions I had taken. It was hard to get over this disappointment because I usually succeed in every challenge I take. But after all, I think that failing at Barkley twice made me stronger, more resilient. Disappointment is necessary to make you want to train harder, spend more time studying the maps, and prepare better ā.
***
The exact route of the Barkley Marathons changes slightly every year. Laz aims to design a course that is just so close to impossibility. If someone finishes the race, the following year the course might just get harder.
Navigation is crucial: 80% of the race is off-trail, unmarked. If that would not be enough challenge, runners must locate a series of hidden books along the course and rip out a page (corresponding to the runnerās bib number) to prove theāve done the full loop. In what seems like a cruel Easter egg, Laz carefully chooses the books and pages, so they include phrases and messages such as ābad luck and troubleā, āabandon hopeā, or ālast will and testament.ā Everything is set up for runners to fail.
Now, for the first time in three participations, Karel was on the fifth loop. He needed to run a fast final loop in order to finish within the 60-hour cutoff. After two full days of running non-stop, he had just a bit less than 14 hours to go.
āAt that point, it becomes nearly impossible to think clearly and make good decisions,ā explains Karel. āI knew that would happen, so I tried to take all those key decisions in advance. If this happens, Iāll do this or Iāll do that. Otherwise, I would have likely thought that this race is impossible and quit.ā
Fatigue and sleep depravation started to compromise Karelās judgment. The book pages that he had carefully folded and packed during the first loop were now paper balls in his backpack. Over forty hours into the race, Karel saw his focus slip away. āAt that point, it becomes nearly impossible to think clearly and make good decisions,ā explains Karel. āI knew that would happen, so I tried to take all those key decisions in advance. If this happens, Iāll do this or Iāll do that. Otherwise, I would have likely thought that this race is impossible and quit.ā
On this occasion, the most important decision this time was to never give up. Karel was determined to keep going even in the event of being hugely behind the schedule. āIāll continue and Iāll go until Iām not allowed to continue,ā he told himself weeks before the race.
As loop five commenced, Karel Sabbe was feeling strong. However, he wasnāt confident that he could finish in time. Despite all his preparations, he had made several small mistakes that cost him several minutes every now and then. Suddenly, he stopped and looked around. Whereās the next book? Having troubles to concentrate he canāt find one of the books. Time passed. āAt this moment, I thought that if I couldnāt find the book in the next five minutes, I was out,ā he says. He was close. Damn close to the complete the last loop.
Suddenly, there it was. As he ripped the page, he felt his blood pumping, an adrenaline rush. He accelerated and ran.
Six minutes and 27 seconds before the 60-hour cut off time, Karel Sabbe did it. He completed the fifth loop, becoming the 17th finisher of Barkley Marathons since the first run 1986.
Back in Belgium, people were waking up and getting ready for the day. Karel had accomplished a once-in-a-lifetime achievement. āOf course, there were a few tears shed at the end,ā he says.
***
Weeks later, back to his dental practice and his family, Karel Sabbe has yet to process what it means to finish the Barkley Marathons. Heās too busy looking ahead to reflect on the past. This summer, heās going back to the Pacific Crest Trail, a 2,653-mile trail that goes from the Mexico-US border to the Canada-US, crossing forests, mountains, and deserts. His goal is break the fastest know time and be the fastest known time again: the goal is 51 days, 16 hours and 55 minutes.
āI want to set a super strong record that maybe can never be broken. But even more than even more than that, I want to have a great adventure, facing my limits once and understand what that means.ā, concludes Karel.
Polar Vantage M3 is a smart multi-sport watch for multi-sport athletes thatās compact yet powerful, stylish yet strong, and designed to bring extraordinary training, sleep and recovery tools into everyday life.