Running News Daily

Experts break down which type of runner is most likely to benefit from tests including a gait analysis, VO2 max, and more.

Running itself is pretty basic—in the best of ways. All you really need is a pair of running shoes to get started. Of course, additional gear can be helpful, not to mention fun to test out and use to boost performance. Investing in certain fitness tests and assessments can also up the fun factor and give you an edge for training and race-day success. 

These days, you can find a ton of options in this realm, which can feel overwhelming, but experts caution against getting too caught up in the hype. 

“Information and knowledge is a good thing, but sometimes there can be a little bit too much,” says James Robinson, M.D., sports medicine physician at Hospital for Special Surgery. He says that if you’re not having problems (like injuries or pain) and you’re hitting reasonable running goals, you probably don’t *need* any type of fitness test. 

One exception: Keep up with your yearly physicals (during which you may have some blood work done) as a baseline. From there, your doctor may also suggest other specific tests (like a DEXA scan, which looks at bone density, for those with osteopenia or a history of broken bones). 

That said, keep reading for what runners should know about some of the most popular fitness lab tests out there right now, how each can support your goals, and which type of runner is more likely to benefit from investing in each one. 

If you’re chronically injured or looking to improve efficiency...

Consider a gait analysis

A gait analysis—which involves being recorded from different angles while running on a treadmill to look at form, including foot strike and body alignment—is especially useful for runners with chronic injuries like shin splints, patellofemoral pain, or IT band issues, says Robinson. 

“The gait analysis can show things in your running mechanics that are making you more prone to injuries and especially certain types of injuries,” says Robinson. This analysis may also ID weaknesses or muscle imbalances and things like overstriding, overpronating, or a low cadence.

Runners looking to improve efficiency may also benefit from this test. “There can be ways to improve your biomechanics to improve your running efficiency,” like working on optimizing hip extension, which is important for minimizing vertical excursion (or too much up and down movement rather than straight ahead).

N’Namdi Nelson, C.S.C.S., an exercise physiologist at NYU’s Sports Performance Center adds that beginners can benefit from a gait analysis: “The activity you’re going to be doing is running, so why not do a running analysis to assess your biomechanics to see exactly what's going on in your gait, and identify things that you may be doing incorrectly and ways that you can improve it?” This will not only set you up for success in the sport of running in terms of performance, but help you avoid injuries before they show up in your stride.

Where to get it: Running labs like at universities and medical centers or at a local physical therapy clinic

Typical cost: Starting at about $150 (or free with your physical therapy appointment, depending on insurance)

If you’re new to running…

Consider a functional movement screening (FMS)

When doing a functional movement screen, a coach or trainer will typically put you through movements (e.g. a single-leg squat, push-up, and step-over) and watch how your body moves. If your hip drops to one side or your knees cave in on that squat, for example, that could indicate weakness in your core stability, Robinson says, which could affect your injury risk in running. The facilitator will then give you specific exercise recommendations to strengthen those weaknesses. 

Nelson recommends the FMS for beginners in particular. “It’s going to give us more information as to what’s going on in the body,” he says. “So for example, if we see weakness in certain muscles or a decrease in flexibility in certain joint ranges, then we can try to get ahead of it and try to correct it, decreasing your chances of sustaining some type of running-related injury.”

Where to get it: Some places, like NYU, HSS, and the Columbia RunLab, offer running analyses which combine a gait analysis on a treadmill with a movement screen like the FMS so it’s one stop shopping. Nelson says that having information from both of these inputs—the gait analysis and FMS—can be helpful when making correlations. 

You can also often get an FMS at a gym as part of an initial training evaluation, and it can be useful on its own. (If you’re choosing between a gait analysis and an FMS, Robinson argues the former is more beneficial as it’s more specific to runners.) 

Typical cost: Included in the above services, with rates changing depending on insurance and/or location

If you’re more experienced and/or get sidelined by cramps…

Consider a metabolic profile test

This type of test typically includes a VO2 max test, lactate threshold evaluation, and metabolic efficiency testing. It involves a finger stick capillary blood test, as well as running on a treadmill at increasing intensity with a mask on to measure how much oxygen you’re consuming, as well as CO2 output and heart rate. 

VO2 max measures your aerobic capacity. It can give you a sense of your cardiovascular fitness, which can be helpful as a benchmark to try to improve (often via short, intense intervals). 

This test can also help you determine your max heart rate, and training zones based on that

“Lactate threshold is basically the point at which your body starts to go from aerobic to anaerobic and starts to really ramp up its levels of lactate,” says Robinson. “The lactate threshold basically tells a runner the pace at which they could run a short distance, like a 5K or 10K, which can be useful when you’re talking about training paces.” 

Importantly, lactate threshold is something you can train and improve, Robinson adds. Knowing your threshold allows you to train in the proper zones to increase it. For example, if your lactate threshold is nine minutes per mile, then training with runs at that pace could help to improve that, Robinson says. (And then if you repeated this test months later, you can see if it improves.)

As for metabolic efficiency, Robinson says this can help you strategize fueling for long races—and it’s also trainable. This test profile measures how many calories you use per hour and the breakdown of fat versus carbohydrate at various exercise intensities. 

“We have a lot of fat stores in our body, but our body has very limited carbohydrate stores,” he says. So, if the test reveals that you’re using mostly carbs for long runs, for example, you’ll run out of fuel quickly and knowing this would help you ID exactly how much nutrition you need to bring along.

Robinson says this test is most useful for runners trying to improve efficiency and pace. For example, if you want to run a sub-four-hour marathon, this test can be useful to one, see if you’re able to achieve that goal at your current fitness level, and if not, figure out which zones to train to get there. 

The test can also be useful for those who deal with cramping when they run. “Usually cramps are a fueling issue more so than a true dehydration issue,” says Robinson. “So the metabolic profile can be useful for fueling to see why someone might be cramping, or for someone that hits a wall at mile 20 or 21 in the marathon, that could be a fueling issue, and the metabolic profile can definitely help clue you into strategies to help.” 

Where to get it: At NYU, this test is called the “Sports Performance” evaluation and includes a gait analysis, stability and mobility screen, and VO2 max, with the option to add lactate threshold testing. At HSS, it’s Metabolic Testing and includes all of the metrics (VO2 max, lactate threshold, metabolic efficiency, and also running economy). You also may be able to find similar tests at other universities, medical centers, and running labs. 

If you want to DIY…

Use your wearable data

Robinson acknowledges that many wearables now provide lots of info that you’d get as part of a formal gait analysis, like cadence, vertical oscillation, and stride length, in addition to metrics like VO2 max. “They’re pretty accurate now,” he says, adding that they can be more accessible and less expensive (assuming you’ve already paid for the wearable) than additional testing. 

Still, sometimes people need help with interpretation of this data and they don’t know what to do with it on their own. “Seeing an exercise physiologist or a running coach could help them interpret some of the data,” he says.

Typical cost: Free (after the cost of a wearable, which typically starts around $200) 

If you’re into lots of data and optimizing health…

Consider a blood panel

As long as you pass your yearly physical, additional blood work probably won’t tell you much more about your running performance, according to Nelson. “You can identify some nutritional deficiencies and things like that that may affect your performance, but those things may also be highlighted in your yearly physical,” he adds. 

However, for those really into data and optimization of health and performance, a full blood panel might be helpful, so long as you know what to do with the information (or have someone to interpret the results). This additional screen may look into nutritional biomarkers beyond your typical blood test at a physical, like omega-3 levels, electrolytes like calcium and magnesium, and many other health-related metrics that are related to heart health, immune regulation, and more.

The one biomarker both experts agree is wise to get tested for all runners is vitamin D. “I do recommend that runners get their vitamin D checked regularly because if you are low in vitamin D, then that can put you at risk for bone injuries such as stress fractures, and vitamin D deficiency is extremely common, especially in places where you don’t get as much sunlight,” says Robinson. 

Other than that, if you’re having specific issues or have concerns about your overall health, consult with your doctor to see what biomarkers, if any, should be tested. 

Where to get it: Your doctor should be able to run additional lab tests if you have a medical need for them, but you can also try a direct-to-consumer service like Function or Inside Tracker.

Typical cost: Free one time a year with most insurance providers (for the basics), but around $500 for the DTC services. 

Ethiopia’s Fotyеn Tesfay Haylu delivered one of the most remarkable women’s half-marathon performances ever seen on American soil on Sunday, powering to a commanding victory at the 2026 Buenos Aires Half Marathon in Argentina in 1:03:57.

Running with exceptional confidence and strength, Tesfay took control of the race and produced a superb solo performance to rewrite the event record. Her breathtaking run also carried historic significance, as she became the first woman to break the 64-minute barrier for the half marathon in the Americas, producing what is being celebrated as the fastest women’s half-marathon performance ever recorded on the continent.

The Ethiopian star was in a class of her own, crossing the finish line more than a minute clear of Turkey’s Nevin Can, who finished second in 1:05:06. Another Turkish athlete, Selin Can, completed the podium in third place with 1:05:11, as the leading trio all produced strong performances on the fast streets of Buenos Aires.

Kenya also featured prominently in the top positions, with Irene Jepchumba Kimais taking fourth in 1:06:04, followed by Sheila Chepkirui in fifth with 1:06:13. Magaret Akidor Ngathike finished sixth in 1:06:46, while fellow Kenyan Deborah Samum claimed seventh place in 1:08:32.

Brazil’s Nubia de Oliveira Silva was eighth in 1:11:13, while Argentina’s Sofia Luna and Dahyana Juarez rounded out the top 10 with times of 1:11:21 and 1:11:28, respectively.

Top 10 Women – 2026 Buenos Aires Half Marathon

1. Fotyеn Tesfay Haylu (Ethiopia) – 1:03:57

2. Nevin Can (Turkey) – 1:05:06

3. Selin Can (Turkey) – 1:05:11

4. Irene Jepchumba Kimais (Kenya) – 1:06:04

5. Sheila Chepkirui (Kenya) – 1:06:13

6. Magaret Akidor Ngathike (Kenya) – 1:06:46

7. Deborah Samum (Kenya) – 1:08:32

8. Nubia de Oliveira Silva (Brazil) – 1:11:13

9. Sofia Luna (Argentina) – 1:11:21

10. Dahyana Juarez (Argentina) – 1:11:28

For Tesfay, it was far more than a race victory. Her 1:03:57 performance was a statement of extraordinary quality, combining speed, endurance and remarkable solo running to produce a landmark result in Buenos Aires. In a race that will be remembered for years to come, the Ethiopian did not simply win—she redefined what was thought possible for women’s half-marathon running in the Americas.

Ethiopia’s Yomif Kejelcha produced one of the most extraordinary performances in road racing history on the streets of Buenos Aires, Argentina, reclaiming the half marathon world record with a sensational 56:51 performance at the 2026 Buenos Aires Half Marathon.

The former world record-holder delivered a breathtaking exhibition of speed and endurance to take 29 seconds off the previous pending mark of 57:20, set by Uganda’s Jacob Kiplimo and takes a huge chunk from his own former official world record. Kejelcha's new performance is pending the standard ratification procedures, but if officially ratified, it will return the world record to the Ethiopian star and mark another remarkable chapter in the evolution of the event. 

Kejelcha's achievement is particularly significant because the 57-minute barrier had already been broken before. Jacob Kiplimo had previously run under 57 minutes, clocking 56:42 that was not ratified demonstrating that the once-unthinkable barrier was possible. Kejelcha, however, has become the second man to run under 57-minute barrier who now returns to the top of the all-time rankings with another historic performance in Buenos Aires.

The Ethiopian's race was remarkable not only for the final time but also for the way he built his performance. He covered the opening five kilometres in 13:44 before reaching 10km in 27:18. Rather than slowing, Kejelcha accelerated through the middle stages, passing 15km in 40:39 and 20km in 54:02 as he continued to push the limits of elite road racing.

By the time he reached the finish line, Kejelcha had completed the race at an extraordinary average pace of approximately 2:42 per kilometre, producing one of the most astonishing sustained efforts ever witnessed in distance running. His stunning run sent a powerful message to the athletics world and further strengthened his status as one of the most formidable distance runners of his generation.

Behind the record-breaking champion, Ethiopia completed a dominant clean sweep of the men's podium. Tadese Worku Gebresilase claimed second place in 59:18, while Bereket Nega Batebo secured third in 1:00:17, giving Ethiopia a memorable one-two-three finish in the Argentine capital.

Kenya’s Jonathan Kipkoech Kamosong finished fourth in 1:00:20, followed by compatriot Simon Maywa in fifth with 1:00:55. Argentina’s Ignacio Erario gave the home supporters plenty to celebrate with an impressive sixth-place finish in 1:00:57, breaking the one-hour barrier in front of an enthusiastic local crowd.

Dillon Kipyeko of Kenya finished seventh in 1:01:07, with Robert Kiprop Koech eighth in 1:02:01. Mexico’s Julio Ortiz Ponce took ninth place in 1:03:17, while Colombia’s Jimmy Gómez completed the top 10 in 1:03:34.

The Buenos Aires Half Marathon will now take its place in the history books as the scene of a truly extraordinary breakthrough. For Kejelcha, this was more than just another victory. It was a spectacular return to the top, reclaiming a world record he had previously held and once again rewriting the limits of the half marathon.

The 56:51 performance remains pending ratification, but Yomif Kejelcha's run has already delivered one of the defining moments in the history of road racing.

Kenya delivered another commanding display of distance-running excellence at the Antrim Coast Half Marathon, with Isaia Lasoi leading a memorable Kenyan clean sweep of the men's podium in a race packed with world-class performances.

Lasoi emerged victorious after a thrilling battle at the front, crossing the finish line in a superb 58:26 setting a new course record. His winning performance underlined his strength and speed over the half-marathon distance, but he was made to work all the way by fellow Kenyan Daniel Mateiko, who finished just three seconds behind in 58:29 after an electrifying duel for the title.

The contest between the two leaders produced one of the standout moments of the race, with both athletes pushing deep into elite territory as they fought for victory. In the end, Lasoi found just enough to secure the win, while Mateiko's narrow defeat highlighted the remarkable depth and quality of Kenya's leading distance runners.

Vincent Kipkorir completed the Kenyan sweep, taking third place in 1:00:38 to ensure that all three places on the podium belonged to Kenyan athletes. Samwel Chebolei added further Kenyan strength to the results, finishing fourth in 1:01:01, while Amos Langat was also among the leading finishers.

The international field featured several prominent names. Australia's Jimmy Whelan produced a strong run, while Ethiopia's Yismaw Dillu featured among the front group. American marathon star Galen Rupp also delivered a notable performance, clocking 1:01:29 in another competitive outing for the experienced distance runner. Former world-class track and road athlete Edward Cheserek was also among the top finishers.

Lasoi's 58:26 victory, however, was the defining performance of the day. Together with Mateiko and Kipkorir, he gave Kenya a perfect podium and another emphatic reminder of the country's extraordinary strength in elite road running.

The Antrim Coast Half Marathon once again provided a fast, competitive stage for some of the world's finest distance runners, but when the decisive moments arrived, it was Kenya that owned the podium.

One of the most iconic milestones in the history of ultramarathon running is drawing closer, with entries for the historic 100th edition of the Comrades Marathon set to open on Tuesday, 25 August 2026.

The Comrades Marathon Association has officially announced a detailed entry process for the 2027 race, which will unfold in three stages and give runners around the world the opportunity to secure their place in what promises to be one of the most significant editions ever held of The Ultimate Human Race.

The announcement followed the official launch of the 2027 Comrades Marathon on Wednesday, 19 August, when the centenary campaign, “The Greatest Story Ever Run,” was unveiled alongside a special logo created exclusively for the landmark 100th edition.

The launch also revealed several major highlights for the Centenary Race. The historic event will take place on Sunday, 13 June 2027, and will be a Down Run, with 28,000 places available. The entry process will include a ballot, while the race will offer a record R8.919 million in prize money. Organisers have also set an ambitious goal of raising R10 million for the Amabeadibeadi charities, adding an important charitable dimension to the centenary celebrations. One of the defining moments of the launch was the unveiling of the special Centenary mark, created to commemorate this extraordinary milestone in the history of the race.

The entry process begins on 25 August at 10:00 a.m. SAST, when entries open for Green Number runners, Yellow Number runners and Amabeadibeadi charity entrants.

The next phase follows on 2 September at 10:00 a.m. SAST, when entries open for Comrades Marathon Association members. This window will remain open for 72 hours or until the available entry allocation is filled, with places offered on a strictly first-come, first-served basis.

For general entrants, the process will move to a ballot system. General entries open on 9 September at 10:00 a.m. SAST, with runners able to enter the ballot until it closes on 22 September at 4:30 p.m. SAST. The ballot draw is then scheduled to take place on 23 September.

Several other crucial dates will shape the road to the historic race. The substitution period will run from 15 to 31 March 2027, while 3 May 2027 is the final deadline for runners to submit their qualifying performances, seeding information and other required entry details.

To qualify for the 2027 Comrades Marathon, runners must complete a 42.2km marathon in under five hours between 15 June 2026 and 3 May 2027.

The journey will finally culminate on Sunday, 13 June 2027, when thousands of runners are expected to line up for the historic 100th edition of the Comrades Marathon.

The 2027 race will represent a remarkable moment for the legendary South African ultramarathon. For more than a century, the Comrades Marathon has captured the imagination of runners and spectators with its extraordinary test of endurance, determination and human spirit. Its centenary edition will celebrate the generations of athletes who have faced its demanding roads, conquered its challenges and helped build one of the world's most respected endurance events.

For runners dreaming of becoming part of this historic occasion, the road to Comrades 2027 is now clearly marked. From the opening of entries in August 2026 to race day in June 2027, every deadline will matter.

The Greatest Story Ever Run is preparing for its most historic chapter yet.

American sprint standout Sam Blaskowski is taking steps toward an international future with Poland after uncovering a powerful connection to his family's ancestral homeland.

The 23-year-old sprinter, who has established himself as one of the fastest Americans of his generation with a personal best of 9.89 seconds in the 100 metres, has begun the process of obtaining Polish citizenship with the aim of eventually representing Poland in international competition.

Blaskowski's connection to the country traces back through his great-grandparents, Franciszek and Julian Błaszkowski, who emigrated from Poland to the United States in 1905. Their journey more than a century ago has now opened an unexpected new chapter for their descendant, whose athletic ambitions could soon carry the Błaszkowski name back onto the international stage under Polish colours.

The sprinter has already received support from the Polish Athletics Association as he works through the citizenship and eligibility process. Should his transfer of allegiance be completed, Blaskowski could become a significant addition to Poland's sprint programme.

His credentials certainly make the prospect an exciting one. In addition to his sub-10-second speed over 100 metres, Blaskowski owns a personal best of 19.93 seconds in the 200 metres, demonstrating the kind of versatility that could prove valuable both individually and in Poland's 4x100m relay squad.

For Blaskowski, however, the move is about more than simply changing national colours. It represents an opportunity to reconnect with his family's heritage while pursuing his ambitions at the highest level of the sport.

With his sights set on becoming part of Poland's international sprint team and competing for relay medals, Blaskowski's journey from discovering his Polish roots to potentially representing the country of his ancestors could become one of the most fascinating allegiance stories in world athletics.

A century after Franciszek and Julian Błaszkowski left Poland for America, their family's story may now be coming full circle—this time at full sprint.