Sprinting is running over a short distance at the top-most speed of the body in a limited period of time. It is used in many sports that incorporate running, typically as a way of quickly reaching a target or goal, or avoiding or catching an opponent. Human physiology dictates that a runner's near-top speed cannot be maintained for more than 30–35 seconds due to the depletion of phosphocreatine stores in muscles, and perhaps secondarily to excessive metabolic acidosis as a result of anaerobic glycolysis.
Deep diving is underwater diving to a depth beyond the norm accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is associated with a level of certification or training, and it may vary depending on whether the diving is recreational, technical or commercial. Nitrogen narcosis becomes a hazard below 30 metres (98 ft) and hypoxic breathing gas is required below 60 metres (200 ft) to lessen the risk of oxygen toxicity.
The 1500 metres or 1,500-metre run is the foremost middle distance track event in athletics. The distance has been contested at the Summer Olympics since 1896 and the World Championships in Athletics since 1983. It is equivalent to 1.5 kilometers or approximately 15⁄16 miles. The event is closely associated with its slightly longer cousin, the mile race, from which it derives its nickname "the metric mile".
The 5000 metres or 5000-metre run is a common long-distance running event in track and field, approximately equivalent to 3 miles 188 yards or 16,404 feet 2 inches. It is one of the track events in the Olympic Games and the World Championships in Athletics, run over 12+1⁄2 laps of a standard track. The same distance in road running is called a 5K run; referring to the distance in metres rather than kilometres serves to disambiguate the two events. The 5000 m has been present on the Olympic programme since 1912 for men and since 1996 for women. Prior to 1996, women had competed in an Olympic 3000 metres race since 1984. The 5000 m has been held at each of the World Championships in Athletics in men's competition and since 1995 in women's.
The Rieti Meeting is an annual athletics event at the Stadio Raul Guidobaldi in Rieti, Italy that takes place in late August or early September. Previously one of the IAAF Grand Prix events, it is now part of the IAAF World Challenge.
The IYRU Fifteen Metre class yachts are constructed to the First International rule of 1907. A total of twenty 15mR yachts were built between 1907 and 1917, the four that have survived are still actively raced.
Jiaolong is a Chinese crewed deep-sea research submersible that can dive to a depth of over 7,000 metres (23,000 ft), developed from the Sea Pole-class bathyscaphe. It has the second-greatest depth range of any crewed research vehicle of the Chinese Navy; the only crewed expeditions to have gone deeper were the dives of the Trieste bathyscaphe in 1960, Archimède in 1962, Deepsea Challenger in 2012, and DSV Limiting Factor in 2019.
The Marshall Islands marked its second consecutive Olympiad, at the 2012 Summer Olympics in London, from July 27 to August 12, 2012. The Olympian delegation included two men and two women, one male and one female athlete in athletics and one male and one female athlete in swimming. Middle-distance runner Haley Nemra was honored as the national flag bearer at the opening ceremony. The Marshall Islands continued their streak of bringing home no medals.
The women's pentathlon event at the 2015 European Athletics Indoor Championships was held at March 6, 2015.
The 2015 African Junior Athletics Championships was the twelfth edition of the biennial, continental athletics tournament for African athletes aged 19 years or younger. It was held at the Addis Ababa Stadium in Addis Ababa, Ethiopia from 5–8 March. It was the first time that Ethiopia hosted the event and followed on from the 2008 African Championships in Athletics, which was hosted at the same venue.
Diving at the 2015 World Aquatics Championships was held between 24 July and 2 August 2015 in Kazan, Russia.
The 2015 ICF Canoe Sprint World Championships, the 41st edition of the World Championships, were held from 19–23 August 2015 in Milan, Italy.
The 2015 German Athletics Championships were held at the Frankenstadion in Nuremberg on 25–26 July 2015.
The women's 1500 metres event at the 2015 Summer Universiade was held on 10 and 12 July at the Gwangju Universiade Main Stadium.
Shadrack Kipchirchir is a Kenyan-born American distance track and field Olympian specializing in the 10,000 m. Following in his brothers footsteps, Kipchirchir enlisted in the U.S. Army in October 2014 and joined the U.S. Army World Class Athlete Program after his enlistment.
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