The effects of creatine supplementation on short-term exercise performance of U.S. Navy SEALs.

1999 ◽  
Author(s):  
Wayne Y. Ensign ◽  
Ira Jacobs ◽  
William K. Prusaczyk ◽  
Harold W. Goforth ◽  
Patty G. Law ◽  
...  
Keyword(s):  
Exercise Performance ◽  
Creatine Supplementation ◽  
Short Term ◽  
Navy Seals

EFFECTS OF CREATINE SUPPLEMENTATION ON SHORT-TERM ANAEROBIC EXERCISE PERFORMANCE OF U.S. NAVY SEALS.

1998 ◽  
Vol 30 (Supplement) ◽  
pp. 265
Author(s):  
W. Y. Ensign ◽  
I. Jacobs ◽  
W. K. Prusaczyk ◽  
H. W. Goforth ◽  
P. G. Law ◽  
...  
Keyword(s):  
Exercise Performance ◽  
Creatine Supplementation ◽  
Anaerobic Exercise ◽  
Short Term ◽  
Navy Seals

Legal pre-event nutritional supplements to assist energy metabolism

2008 ◽  
Vol 44 ◽  
pp. 27-44 ◽  
Author(s):  
Lawrence L. Spriet ◽  
Christopher G.R. Perry ◽  
Jason L. Talanian
Keyword(s):  
Skeletal Muscle ◽  
Sodium Bicarbonate ◽  
Exercise Performance ◽  
Creatine Supplementation ◽  
Muscle Metabolism ◽  
Nutritional Supplements ◽  
Training Programme ◽  
Intense Exercise ◽  
Short Term ◽  
Negative Side Effects

Physical training and proper nutrition are paramount for success in sport. A key tissue is skeletal muscle, as the metabolic pathways that produce energy or ATP allow the muscles to complete the many activities critical to success in sport. The energy-producing pathways must rapidly respond to the need for ATP during sport and produce energy at a faster rate or for a longer duration through training and proper nutrition which should translate into improved performance in sport activities. There is also continual interest in the possibility that nutritional supplements could further improve muscle metabolism and the provision of energy during sport. Most legal sports supplements do not improve performance following oral ingestion. However, three legal supplements that have received significant attention over the years include creatine, carnitine and sodium bicarbonate. The ingestion of large amounts of creatine for 4–6 days increases skeletal muscle creatine and phosphocreatine contents. The majority of the experimental evidence suggests that creatine supplementation can improve short-term exercise performance, especially in sports that require repeated short-term sprints. It may also augment the accretion of skeletal muscle when taken in combination with a resistance-exercise training programme. Supplementary carnitine has been touted to increase the uptake and oxidation of fat in the mitochondria. However, muscle carnitine levels are not augmented following oral carnitine supplementation and the majority of well-controlled studies have reported no effect of carnitine on enhancing fat oxidation, V̇o2max or prolonged endurance exercise performance. The ingestion of sodium bicarbonate before intense exercise decreases the blood [H+] to potentially assist the efflux of H+ from the muscle and temper the metabolic acidosis associated with intense exercise. Many studies have reported performance increases in laboratory-based cycling tests and simulated running races in the field following sodium bicarbonate ingestion where the need for ATP from substrate phosphorylation is high. However, other studies have reported no benefit and the incidence of negative side effects is high.

Short-Term Effects of Carbon Monoxide Exposure on the Exercise Performance of Subjects with Coronary Artery Disease

1989 ◽  
Vol 321 (21) ◽  
pp. 1426-1432 ◽  
Author(s):  
Elizabeth N. Allred ◽  
Eugene R. Bleecker ◽  
Bernard R. Chaitman ◽  
Thomas E. Dahms ◽  
Sidney O. Gottlieb ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Carbon Monoxide ◽  
Coronary Artery ◽  
Exercise Performance ◽  
Short Term ◽  
Artery Disease ◽  
Short Term Effects

The effect of music on short-term exercise performance during the different menstrual cycle phases in female handball players

2020 ◽  
pp. 1-11
Author(s):  
Nourhen Ghazel ◽  
Amine Souissi ◽  
Hamdi Chtourou ◽  
Ghaith Aloui ◽  
Nizar Souissi
Keyword(s):  
Menstrual Cycle ◽  
Exercise Performance ◽  
Short Term

scholarly journals The effects of phosphocreatine disodium salts plus blueberry extract supplementation on muscular strength, power, and endurance

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
John Paul V. Anders ◽  
Tyler J. Neltner ◽  
Robert W. Smith ◽  
Joshua L. Keller ◽  
Terry J. Housh ◽  
...  
Keyword(s):  
Placebo Group ◽  
Exercise Performance ◽  
Muscular Strength ◽  
Minimal Important Difference ◽  
Average Power ◽  
Creatine Supplementation ◽  
Peak Torque ◽  
Before And After ◽  
Group A ◽  
Percent Decline

Abstract Background Numerous studies have demonstrated the efficacy of creatine supplementation for improvements in exercise performance. Few studies, however, have examined the effects of phosphocreatine supplementation on exercise performance. Furthermore, while polyphenols have antioxidant and anti-inflammatory properties, little is known regarding the influence of polyphenol supplementation on muscular strength, power, and endurance. Thus, the purpose of the present study was to compare the effects of 28 days of supplementation with phosphocreatine disodium salts plus blueberry extract (PCDSB), creatine monohydrate (CM), and placebo on measures of muscular strength, power, and endurance. Methods Thirty-three men were randomly assigned to consume either PCDSB, CM, or placebo for 28 days. Peak torque (PT), average power (AP), and percent decline for peak torque (PT%) and average power (AP%) were assessed from a fatigue test consisting of 50 maximal, unilateral, isokinetic leg extensions at 180°·s− 1 before and after the 28 days of supplementation. Individual responses were assessed to examine the proportion of subjects that exceeded a minimal important difference (MID). Results The results demonstrated significant (p < 0.05) improvements in PT for the PCDSB and CM groups from pre- (99.90 ± 22.47 N·m and 99.95 ± 22.50 N·m, respectively) to post-supplementation (119.22 ± 29.87 N·m and 111.97 ± 24.50 N·m, respectively), but no significant (p = 0.112) change for the placebo group. The PCDSB and CM groups also exhibited significant improvements in AP from pre- (140.18 ± 32.08 W and 143.42 ± 33.84 W, respectively) to post-supplementation (170.12 ± 42.68 W and 159.78 ± 31.20 W, respectively), but no significant (p = 0.279) change for the placebo group. A significantly (p < 0.05) greater proportion of subjects in the PCDSB group exceeded the MID for PT compared to the placebo group, but there were no significant (p > 0.05) differences in the proportion of subjects exceeding the MID between the CM and placebo groups or between the CM and PCDSB groups. Conclusions These findings indicated that for the group mean responses, 28 days of supplementation with both PCDSB and CM resulted in increases in PT and AP. The PCDSB, however, may have an advantage over CM when compared to the placebo group for the proportion of individuals that respond favorably to supplementation with meaningful increases in muscular strength.

scholarly journals Short-term effects of Lumacaftor/Ivacaftor (Orkambi™) on exertional symptoms, exercise performance, and ventilatory responses in adults with cystic fibrosis

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Bradley S. Quon ◽  
Andrew H. Ramsook ◽  
Satvir S. Dhillon ◽  
Reid A. Mitchell ◽  
Kyle G. Boyle ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Exercise Performance ◽  
Short Term ◽  
Ventilatory Responses ◽  
Short Term Effects
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