Running News Daily

It's is easy to assume you get enough vitamin D naturally-you eat chocolate ice cream like a champ and frolic in the mountains, spending significant time in the sunshine. But then a routine blood test shows you have low vitamin D.

You turn to Google and realize Rocky Road has zero percent of the recommended daily value of vitamin D. And dermatologist-approved sun protection like long-sleeved shirts and SPF-50 sunscreen limits your chance of absorbing it from sun exposure.

It's not unimportant. Research shows that vitamin D deficiency plays a role in stress injuries, and may contribute to decreased performance and impaired immune function.

The Science of Vitamin D

Vitamin D is a fat-soluble vitamin that can be obtained from food, supplements and sun exposure. The liver and kidneys help convert the vitamin to its active form, which is most known for its regulation of calcium and promotion of bone mineralization. However, vitamin D also influences cell growth and neuromuscular and immune function. It could even have some influence on cancer rates.

Medical experts differ in their  recommendations for adequate vitamin D levels. The U.S. Endocrine Society considers insufficiency to be a blood level less than 30 ng/mL, while many sports-medicine doctors recommend that athletes have levels above 50 ng/mL. If you are concerned about your vitamin D level, ask your doctor to perform a blood test.

So how can Vitamin D aid in our running success?Bone Strength

As trail runners, we demand a lot from our bones. On a downhill, impact forces can increase by over 50 percent. Multiply that by the many miles of a long training run or race and you can understand the stress facing our feet, shins and femurs.

Several scientific studies have linked sub-par vitamin D levels and bone-stress injuries. One study published by the American College of Foot and Ankle Surgeons followed 53 patients with stress fractures from 2011 through 2014 and found that 83 percent of these patients had vitamin D levels below 40 ng/mL and 53 percent had levels below 30 ng/mL.

Athletic Performance

We all strive to run faster (or to have better adventures). Vitamin D could play a role in improving performance, though its adventure-boosting power is subject to debate. While vitamin D deficiency can cause muscle weakness and pain, experts in the field continue to debate the role of supplementation and athletic performance in individuals with levels greater than 30 ng/mL.Immune Function

While a well-timed snot rocket can be a source of laughs on a group training run, it is best when your runny nose is less active than your running legs. Several studies have found a link between vitamin D deficiency and autoimmune disorders such as multiple sclerosis, but the association between the vitamin and upper-respiratory infections is still equivocal.

The bottom line? Vitamin D clearly prevents bone-stress injuries. According to some debated studies (and anecdotes from runners), it could influence direct aspects of athletic performance as well. Trail runners should focus on a lifestyle that promotes healthy vitamin D levels for strong bones. And, if experts reach a consensus on the other benefits, it will be a nice bonus.  

The recommended dietary allowance set by the Institute of Medicine (IOM) for vitamin D is 600 IU (15 micrograms) per day for individuals younger than 70 years old and 800 IU (20 micrograms) per day for individuals 70 and older. There is evidence that 600 to 800 IU per day may not be sufficient for optimal bone health in the athlete population. Some experts recommend that athletes obtain 2,000 to 5,000 IU a day from all vitamin D sources.

The IOM states that the upper limit of vitamin D intake is 4,000 IU (100 micrograms) per day, while the Endocrine Society states that the upper limit is 10,000 IU (250 micrograms) per day.

Chocolate Milk and Other Food Sources

There are very few food sources that contain natural vitamin D. Fatty fish such as salmon, swordfish, trout and mackerel contain it, as do egg yolks and mushrooms. Those on a budget may want to consider canned tuna.

In the American diet, the largest source of vitamin D comes from fortified foods like milk (including soy and almond milk), orange juice and many breakfast cereals.

Sun Exposure

Exposing your skin to the sun's UVB rays is considered one of the best ways to obtain natural vitamin D. It is generally agreed that 15 minutes of direct sun exposure for lighter-skinned individuals and 30 minutes for darker-skinned individuals can produce 1,000 IU of vitamin D.

However, several variables influence the amount of UVB rays that reach our skin, including the season, time of day, cloud cover and location.

Supplements

Vitamin D supplements come in two forms, vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). Research has shown that D3 is the more potent form and is better absorbed and utilized than D2. Supplements come in a variety of forms, including pills, liquid drops and chocolate chews.

Use caution with supplements, as vitamin D toxicity can cause decreased appetite, nausea, vomiting and frequent urination.

Most Olympic marathoners spend their youth focused on running. They join track clubs, compete in national championships, and pursue the sport from an early age.

Julia Mayer’s journey was very different.

Today, Mayer is Austria’s marathon record holder, a multiple national record holder on the roads, and an Olympian. Yet for much of her athletic life, running was not her primary sport.

For 16 years, she played soccer.

Then she discovered something that would change her life.

“I noticed that I was really fast in the fun runs and that it was really, really fun,” Mayer said when reflecting on her transition from soccer to distance running.

What began as curiosity quickly became a passion. She eventually made the bold decision to leave soccer behind and focus entirely on running. It was a move that surprised many people around her, but Mayer believed she had found her true athletic calling.

The decision proved to be the right one.

Within a few years, Mayer developed into one of Europe’s top marathon runners. Her steady improvement carried her from local races to the international stage, where she began rewriting Austria’s record books.

She now holds Austrian records in the marathon, half marathon, and road 10K. Her marathon best of 2:26:08 established her as the fastest female marathoner in Austrian history. Her performances in the half marathon and 10K have further cemented her place among the country’s all-time great distance runners.

Her rise culminated with qualification for the 2024 Olympic Games in Paris.

Competing in the Olympic marathon represented the realization of a dream. On one of the most challenging marathon courses ever used for the Olympics, Mayer ran courageously against the strongest field in the world and finished 55th in her Olympic debut.

Behind the scenes, success has come through extraordinary dedication. During marathon preparation, Mayer trains twice a day and covers approximately 200 kilometers, or 124 miles, each week. The workload demands discipline, patience, and a deep commitment to continuous improvement. 

What makes her story especially inspiring is not simply the records or the Olympic appearance.

It is the fact that she found her greatest talent later than many elite runners.

In a sport where athletes are often identified at a young age, Mayer’s journey serves as a reminder that potential does not always reveal itself early. Sometimes it takes years of experience, a willingness to try something new, and the courage to follow a different path. 

The former soccer player who once chased a ball across a field is now chasing history on the roads of Europe.

And according to those closest to her, her best performances may still be ahead.

For runners of every age and ability, Julia Mayer’s story delivers a powerful lesson: it is never too late to discover what you are capable of.

From soccer player to Olympian, her journey proves that remarkable achievements can begin when least expected.

Megan Keith produced the performance of her career in Oslo on Thursday night, shattering one of Scotland’s longest-standing distance running records and cementing her place among Britain’s greatest female 3000m runners.

The 24-year-old clocked a sensational 8:28.35 over 3000m, breaking the Scottish outdoor record that had stood for nearly four decades. In doing so, Keith eclipsed the previous mark of 8:29.02, set by Scottish legend Yvonne Murray back in 1988, ending a record reign that had lasted 38 years.

Keith’s breakthrough run was more than just a national record. The performance also propelled her to third on the UK outdoor all-time list, placing her behind only two of Britain’s most celebrated distance runners — Paula Radcliffe, who leads the rankings with 8:22.20, and Laura Weightman, whose 8:26.07 remains the second-fastest outdoor mark by a British woman.

The significance of Keith’s achievement is amplified by the calibre of athletes she now joins in the record books. For decades, Murray’s mark stood as one of Scottish athletics’ most untouchable records, surviving generations of elite competitors. Keith has now succeeded where many outstanding runners have fallen short, announcing herself as one of the leading distance talents in British athletics.

Her time also compares favourably with the best performances produced indoors. Olympic medallist Laura Muir ran 8:26.41 indoors in Karlsruhe in 2017, underlining just how exceptional Keith’s outdoor effort in Oslo truly was.

The run continues a remarkable rise for the Scottish star, whose progression over recent seasons has transformed her from a promising prospect into a genuine force on the international stage. Running with confidence and composure against elite competition, Keith demonstrated both the speed and endurance required to challenge the very best in Europe and beyond.

With the World Championship season gathering momentum, Keith’s record-breaking display sends a powerful message. Not only has she etched her name into Scottish athletics history, but she has also established herself as a serious contender in one of the sport’s most competitive events.

In Oslo, Megan Keith did far more than break a record. She ended a 38-year wait, climbed into the upper echelon of British distance running, and delivered a performance that may prove to be a defining moment in her career.

British middle-distance talent Phoebe Gill took another significant step forward in her return to top form, producing a determined victory over 800 metres at the Meeting de Marseille in France on Wednesday.

Competing in challenging, wind-affected conditions, the 19-year-old demonstrated both resilience and composure as she held off a late charge from Switzerland's Veronica Vancardo to secure the win in 2:00.81. Vancardo finished just three hundredths of a second behind in 2:00.84, underlining the fiercely contested nature of the race.

While the margin of victory was narrow, the result represented another encouraging milestone for Gill as she continues to rebuild momentum following her injury setback. The young Briton showed impressive race awareness and strength in the closing stages, maintaining her advantage despite the difficult conditions that made fast running a challenge throughout the evening.

The Marseille triumph adds to a growing body of evidence that Gill is steadily progressing toward her best form. Earlier in her comeback campaign, she clocked 2:01.50 for 800m in Bydgoszcz before demonstrating her versatility with a strong 4:05.53 performance over 1500 metres at the BMC Grand Prix meeting in Trafford.

Those performances have highlighted not only her improving fitness but also her ability to compete across multiple distances as she carefully builds her season. The Marseille victory now provides further confirmation that the European junior star is moving in the right direction.

Gill emerged as one of Britain's most exciting middle-distance prospects through a series of breakthrough performances as a teenager, earning widespread recognition for her fearless racing style and remarkable maturity. Injury temporarily interrupted that upward trajectory, but her recent results suggest she is steadily rediscovering the form that made her one of the sport's brightest young talents.

With each race, the signs of progress become increasingly evident. Winning in difficult conditions and under pressure from a quality field is often a stronger indicator than a fast time alone, and Gill's latest success demonstrated exactly those qualities.

As the summer season gathers pace, the Marseille victory offers another confidence boost for the British teenager, whose return continues to gain momentum. If her recent progression is any indication, Gill could soon find herself back among the leading names on the European middle-distance circuit. 

The NCAA Track and Field Championships delivered a moment few could have predicted as Ja’Kobe Tharp produced one of the most astonishing performances in the history of sprint hurdling, rewriting the record books in spectacular fashion.

Competing in the opening round of the men’s 110-meter hurdles, the Auburn star stunned the athletics world by clocking an incredible 12.75 seconds, becoming the first athlete ever to break the 12.80-second barrier. In doing so, he eclipsed the long-standing world record of 12.80 set by Aries Merritt in 2012, a mark that had stood as one of the sport’s most revered achievements for more than a decade.

What makes Tharp’s breakthrough even more remarkable is the scale of his improvement. Entering the championships, the defending NCAA and U.S. champion had recorded a season-best of 13.05 seconds. Yet under the brightest spotlight, he unleashed a performance that exceeded every expectation, slicing an extraordinary 0.26 seconds from his personal best in a race that instantly became one of the greatest ever run.

The achievement sent shockwaves throughout the track and field community. While Tharp arrived in Eugene as one of the leading contenders for the NCAA title, few envisioned a performance capable of redefining the limits of the event. Instead, the American hurdler delivered a race for the ages, combining flawless technique, explosive speed, and impeccable rhythm from the first hurdle to the finish line.

The historic run not only secured his place in athletics history but also transformed the outlook of the championship. With the world record now in his possession, Tharp advances to the final as the overwhelming favorite, carrying momentum that could make an already unforgettable weekend even more extraordinary.

For years, the 12.80 barrier appeared untouchable. On a stunning day at the NCAA Championships, Ja’Kobe Tharp proved otherwise, producing the kind of performance that reminds fans why sport remains so unpredictable. In a matter of seconds, he turned a routine qualifying round into a landmark moment that will be remembered for generations.

The world record no one saw coming is now a reality—and Ja’Kobe Tharp is the man who changed history.

A new chapter in middle-distance running may have begun in Oslo after American teenager Cooper Lutkenhaus produced one of the most remarkable performances of the season, narrowly defeating reigning Olympic champion Emmanuel Wanyonyi in a thrilling men's 800m contest at the Diamond League meeting.

The 17-year-old sensation shocked a world-class field by crossing the finish line first in a race that came down to the smallest of margins. After an intense battle over the final metres, Lutkenhaus held off Wanyonyi by just one hundredth of a second, producing a dramatic finish that left the packed stadium in disbelief.

From the opening lap, the pace was relentless as the leading contenders positioned themselves for a fierce showdown. As the athletes entered the home straight, Wanyonyi appeared poised to unleash his trademark finishing kick. However, Lutkenhaus refused to be intimidated, matching the Olympic champion stride for stride before producing a perfectly timed lean at the line to secure a historic victory.

The result marks a breakthrough moment for the young American, who continues to establish himself as one of the brightest talents in global athletics. Defeating an Olympic champion at a Diamond League event is a feat many athletes spend entire careers pursuing, yet Lutkenhaus achieved it before reaching adulthood.

For Wanyonyi, the narrow defeat does little to diminish his status as one of the world's premier 800m runners. The Kenyan once again demonstrated his exceptional class and competitiveness, pushing the race to a world-class standard and forcing his young rival to deliver the performance of a lifetime.

Beyond the result itself, the race offered a glimpse into what could become one of the sport's most exciting rivalries in the years ahead. With established stars and emerging talents now pushing each other to new heights, the men's 800m continues to evolve into one of athletics' most captivating events.

On a memorable night in Oslo, the spotlight belonged to Cooper Lutkenhaus. At just 17 years old, he stood toe-to-toe with an Olympic champion and emerged victorious, announcing himself to the athletics world in spectacular fashion.