Determining Whether Gelatin, Hydrolyzed Collagen and Gelatin/Collagen Mixture Have Similar Effects on Collagen Synthesis
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 11
- 试验地点
- 2
- 主要终点
- PINP levels
研究概览
简要总结
Previous work has shown that gelatin supplementation could increase collagen synthesis in humans. In this study subjects consume placebo, 5 or 15 g of gelatin with a standard amount of vitamin C (48 mg) 1 hour before 6 minutes of jump rope exercise. The feeding and exercise intervention was repeated every 6 hours while the subjects were awake for three days and the amount of the amino terminal procollagen I peptide (PINP) was determined; a marker of collagen synthesis, in the blood. Consistent with the hypothesis that gelatin increases collagen synthesis in humans; the amount of PINP in the 15 g gelatin group was significantly higher than either the placebo or the 5 g groups. These data conclusively demonstrate that gelatin supplementation can increase exercise-induced collagen synthesis in humans. Hydrolyzed collagen has a similar amino acid profile, in particular with high concentrations of glycine, proline, hydroxyproline, and arginine. Thus, the current study aims to determine is the same dose of gelatin, hydrolyzed collagen and a gelatin/collagen mix, all with a standard dose of vitamin C effect PINP levels similarly.
详细描述
In preliminary work investigating the physiological determinants of maximal performance in throwing events, researchers found that the best predictor of elite performance was the rate of force development (RFD; Force (N) x time (sec)) when performing and isometric squat. Therefore, it is not surprising that in order to maximize performance, athletes train to optimize RFD.
RFD is determined by three factors:
- Neural activation of the muscles
- Type of motor protein (fast or slow myosin)
- Force transfer Interestingly, performance in power movements (that are highly dependent on RFD) like vertical jump is closely related to tendon stiffness and inversely related to muscle size. This indicates that force transfer, in the form of tendon stiffness, plays an important role in performance and can explain a large amount of variance in determining an athlete's ability to rapidly develop force during a dynamic movement.
The stiffness of a tendon is determined by the amount and cross-linking of collagen within the tissue. Acute exercise is known to increase collagen synthesis as well as the expression of the primary enzyme involved in collagen cross-linking, lysyl oxidase. The result is a denser and stiffer tissue after training. Even though the relationship between exercise and collagen synthesis is known, whether this measure of performance can be improved with nutritional interventions has not been determined.
A recent study looking at amino acid levels following consumption of increasing doses of gelatin (derivative of collagen) in human subjects has shown that the key primary and trace amino acids found in collagen increase in human serum after consuming gelatin. Further, the peak of these amino acids occurs 60 minutes after consuming the gelatin supplement. Therefore, consuming a collagen supplement 1 hour before an exercise intervention should maximize delivery of amino acids to bone and other connective tissues.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Sequential
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 50 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Recreationally active male athletes between the ages of 18-50 years of age training 5-6 days per week including at least 1 training session of running per week.
排除标准
- •Receiving any medication that may interfere with the study.
- •History of more than 3 musculoskeletal injuries within the past 12 months.
- •Health or dietary restriction that would be affected by the supplementation protocol.
- •The initial phases of this study will be performed in males since collagen synthesis varies significantly throughout the menstrual cycle in females. Since collagen is the main outcome measure for this study this natural variation would confound the initial phase of the work. Provided this work proves successful then we will aim to process with similar research in females.
研究组 & 干预措施
effects of gelatin, collagen on PINP levels
The study is aimed at determining if the same dose of gelatin, hydrolyzed collagen (administered in a beverage form) or a mixture gelatin/hydrolyzed collagen (administered in a gummy form) with a standard dose of vitamin C (50 mg) has a similar effect a marker of collagen synthesis (PINP). In a randomized, crossover design subjects consume 3 different nutritional supplements: (a) 15 of gelatin, (b) 15 hydrolyzed collagen (administered in a beverage form) or (c) 15 g of gelatin/hydrolyzed collagen mixture all with a standard dose of vitamin C (50 mg) 1 hour prior to exercise stimulus (6 minutes of jump rope). A baseline assessment with only the jump rope and no intervention will also be conducted prior to the interventions. Each intervention will be separated by a >24 hr washout. Following completion of exercise, subjects will remain in the lab in a rested state for the subs
干预措施: gelatin, collagen, gummy dose (Other)
结局指标
主要结局
PINP levels
时间窗: 4 weeks
To determine optimal dose of supplemental hydrolyzed collagen and vitamin C required to maximally elevate PINP levels (a marker of collagen synthesis) in healthy athletes.
次要结局
未报告次要终点