| 効果 | 増加 |
| 数値 | 10pg/mL |
| 試験方法 | コホート法 |
| 試験期間 | 不明 |
| 被験者数 | 10 |
| 性別 | 不明 |
Elite rugby players
Study in sleep deprivation
The effects of creatine supplementation on performance and hormonal response in amateur swimmers
| 効果 | 増加 |
| 試験方法 | 二重盲検法 |
| 試験期間 | 1-7 Days |
| 被験者数 | 20 |
| 性別 | 男性 |
| 年齢 | 18-29 |
| 体型 | トレーニング中, 平均 |
Creatine loading in amateur athletes improved their swimming performance on a single 50-m sprint (by 4.6% relative to placebo) but failed to improve the 100-m sprint. When all hormones were measured in a rested state, neither growth hormone nor cortisol had changed significantly, but testosterone had increased by at least 15%.
Creatine Supplementation And Health Variables: A Retrospective Study
| 効果 | 増加 |
| 試験方法 | コントロールなし/観察研究 |
| 試験期間 | 不明 |
| 被験者数 | 26 |
| 性別 | 男女 |
| 年齢 | 18-29 |
| 体型 | トレーニング中, 平均 |
In athletes who reported (retrospectively) creatine usage for up to four years, there was no significant adverse effect on healthy markers, although a nonsignificant trend to increase testosterone and decrease LDH (lactate dehydrogenase, a liver enzyme) was noted.
Three Weeks Of Creatine Monohydrate Supplementation Affects Dihydrotestosterone To Testosterone Ratio In College-aged Rugby Players
| 効果 | なし |
| 試験方法 | 二重盲検法 |
| 試験期間 | 不明 |
| 被験者数 | 20 |
| 性別 | 不明 |
Dihydrotestosterone was found to be increased following creatine supplementation, with the increase in testosterone failing to meet statistical significance.
Effect Of Creatine And Beta-alanine Supplementation On Performance And Endocrine Responses In Strength/power Athletes
| 効果 | 増加 |
| 試験方法 | 二重盲検法 |
| 試験期間 | 1-6 ヶ月 |
| 被験者数 | 33 |
| 性別 | 男性 |
| 年齢 | 18-29 |
| 体型 | トレーニング中, 肥満, 平均 |
Conducted in collegiate level football playing males.
Synergism noted between creatine and beta-alanine coingestion in regards to body composition, but power and hormonal differences attributed to creatine.
The Effects Of Creatine Supplementation On Muscular Performance And Body Composition Responses To Short-term Resistance Training Overreaching
| 効果 | 増加 |
| 試験方法 | 二重盲検法 |
| 試験期間 | 2-4 週間 |
| 被験者数 | 17 |
| 性別 | 男性 |
| 年齢 | 18-29 |
| 体型 | 肥満, 平均 |
Dosed at 0.3g/kg bodyweight creatine monohydrate for 7 days followed by 0.05g/kg thereafter.
Investigated creatine monohydrate during overreaching/overtraining, was found to alleviate decreases in power output on some measures and increase strength on others.
Testosterone and Free testosterone were continuously higher in creatine monohydrate group, although the groupXtime effects were not statistically significant.