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en.wikipedia.org/wiki/Creatine_supplements

Creatine supplements are athletic aids used to increase high-intensity athletic performance. ... The substance creatine is naturally formed in vertebrates. ... commercially available until 1993 when a company called Experimental and Applied ... and thus do not allow for significant intra-exercise synthesis of additional creatine ...

www.answers.com/Q/What_are_substances_that_allow_athletes_to_exercise_longer_called

they are called ergogenic aids. ... Water stores heat much longer than other substances do allowing organisms ... Why do athletes get cramps during exercise ?

www.answers.com/Q/How_does_cardiovascular_fitness_allow_you_to_exercise_longer

Get fit and notice that the same stairs no longer gets you breathing heavy. ... What are substances that allow athletes to exercise longer called? they are called ...

courses.lumenlearning.com/ap1/chapter/exercise-and-muscle-performance

Instead, structural proteins are added to muscle fibers in a process called ... Endurance athletes, like marathon-runners also would benefit from a larger ... recovery after muscle damage, reducing the rest required after exercise, and allowing for ... Although performance-enhancing substances often do improve performance, ...

bjsm.bmj.com/content/38/6/666

The Athenians sent a messenger named Feidipides to Sparta to ask for help. ... From these, 23 athletes were found to have taken a banned substance—the ... If motorbikes were allowed, it would still be a good sport, but it would no longer be a bicycle race. ... This in turn controls an athlete's performance in aerobic exercise.

en.wikibooks.org/wiki/Physical_Activity/Aerobic_Exercise

Exercises that are less intense but last longer allow the body to give the ... More intense exercises use up the oxygen in the cells faster than it can be .... Pedals without this system but that offer the possibility to lock your foot are called clipless .

www.nature.com/news/performance-enhancement-superhuman-athletes-1.11029

Jul 18, 2012 ... A course of steroids combined with exercise can translate to a 38% ... Similarly, a group of drugs called HIF stabilizers, which are aimed at treating ... levels in the body, allowing muscles to use oxygen more efficiently. As a result, the team found that divers could hold their breath for 11% longer than normal, ...

www.ncbi.nlm.nih.gov/pmc/articles/PMC4818249

If you quit smoking, you are likely to be able to exercise for longer as early as two ... at risk of developing exercise-induced asthma, or a condition known as bronchial ... Endurance athletes have the potential to inhale more harmful substances into ... You may need to breathe in more deeply and slowly, to allow the lungs to ...

www.collegesportsscholarships.com/aerobic-fitness-science-vo2-max.htm

Muscles involved in exercise produce a significant amount of energy by ... a major component of enzymes (substances responsible for controlling various ... The longer the duration of exercise, the greater the importance of the aerobic system. ... these athletes are forced to draw upon their emergency (anaerobic) sources.

www.ncbi.nlm.nih.gov/pmc/articles/PMC4008803

May 3, 2014 ... The Muscular Adaptation to Endurance Exercise ... Protein produced from the canonical promoter is now called PGC-1α1, ... The longer the athlete is on the bike, in the pool, or running, the longer calcium levels .... Epinephrine has many functions in the body that allow athletes to exercise at high intensities.