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Long-term creatine intake is beneficial to muscle performance during resistance training.

TLDR
It is concluded that long-term creatine supplementation enhances the progress of muscle strength during resistance training in sedentary females.
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Oral creatine supplementation facilitates the rehabilitation of disuse atrophy and alters the expression of muscle myogenic factors in humans

TLDR
It is concluded that oral creatine supplementation stimulates muscle hypertrophy during rehabilitative strength training, mediated by a creatine‐induced change in MRF4 and myogenin expression.
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American College of Sports Medicine roundtable. The physiological and health effects of oral creatine supplementation.

TLDR
Although Cr supplementation exhibits small but significant physiological and performance changes, the increases in performance are realized during very specific exercise conditions, suggesting that the apparent high expectations for performance enhancement, evident by the extensive use of Cr supplementation, are inordinate.
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Deficiency or inhibition of oxygen sensor Phd1 induces hypoxia tolerance by reprogramming basal metabolism

TLDR
It is shown that loss of Phd1 lowers oxygen consumption in skeletal muscle by reprogramming glucose metabolism from oxidative to more anaerobic ATP production through activation of a Pparα pathway.
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ACTN3 (R577X) genotype is associated with fiber type distribution.

TLDR
This study shows that the mechanism, by which the ACTN3 polymorphism has its effect on muscle power, might rely on a control function of fiber type proportions.
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Dietary nitrate improves muscle but not cerebral oxygenation status during exercise in hypoxia.

TLDR
Short-term dietary nitrate supplementation improves arterial and muscle oxygenation status but not cerebral oxygenationstatus during exercise in severe hypoxia, associated with improved exercise tolerance against the background of a similar incidence of AMS.
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Sprint interval training in hypoxia stimulates glycolytic enzyme activity.

TLDR
SIT in hypoxia up-regulated muscle phosphofructokinase activity and the anaerobic threshold more than SIT in normoxia but did not enhance endurance exercise performance.
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Beneficial metabolic adaptations due to endurance exercise training in the fasted state.

TLDR
F is more effective than CHO to increase muscular oxidative capacity and at the same time enhances exercise-induced net IMCL degradation and prevented drop of blood glucose concentration during fasting exercise.
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Beta-alanine improves sprint performance in endurance cycling.

TLDR
Oral betaALA supplementation can significantly enhance sprint performance at the end of an exhaustive endurance exercise bout.
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Evaluation of stroke performance in tennis.

TLDR
The Leuven Tennis Performance Test is concluded that the LTPT is an accurate, reliable, and valid instrument for the evaluation of stroke quality in high-level tennis players.
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