Potato Ingestion and Time-trial Performance
关键词
抽象
描述
The metabolic demands created by endurance activities, which include muscle and liver glycogen depletion as well as losses in body fluids and electrolytes, are significant limitations to the performance potential of the athlete. For this reason, a well-supported recommendation exists for such athletes to consume a carbohydrate formula, in particular, one containing electrolytes during their activity.
Currently, most commercially available exercise-nutrition products for use in endurance activities come at relatively high costs to the athlete. Moreover, the ingredients used within this market vary and could therefore hinder their effectiveness. For example, Fermentable Oligosaccharides Disaccharides Monosaccharides and Polyols (FODMAPs) potentially present in common sports foods (i.e. excess fructose) are known to alter gastrointestinal (GI) function in some individuals. Indeed, 25-70% of endurance athletes experience GI symptoms during exercise. Given the prevalence of exercise induced GI discomfort in this population, it is possible that GI symptoms limit the adherence to nutritional recommendations during exercise. Therefore identification of a targeted nutrition strategy that maximizes GI effectiveness and dietary adherence is warranted.
An alternative to the commercially available sports foods are whole foods. Specifically, white potatoes, which have a high GI index, indicates that their carbohydrate content is readily available. Additionally, potatoes naturally contain potassium, an important electrolyte. Because of these characteristics, potatoes provide the potential to be a low-cost alternative, and merit investigation. To this point, we know of no studies that have explored the effectiveness of white potatoes as an ergogenic aid. Therefore, the purpose of this study is to examine how capable potatoes are at off-setting the losses in muscle and liver glycogen and electrolytes compared to the current products available on the market, i.e. "sports gels."
日期
最后验证: | 08/31/2017 |
首次提交: | 09/18/2017 |
提交的预估入学人数: | 09/20/2017 |
首次发布: | 09/26/2017 |
上次提交的更新: | 10/06/2019 |
最近更新发布: | 10/08/2019 |
实际学习开始日期: | 09/28/2017 |
预计主要完成日期: | 09/28/2019 |
预计完成日期: | 09/28/2019 |
状况或疾病
干预/治疗
Dietary Supplement: Trial 3
Dietary Supplement: Trial 2
Dietary Supplement: Trial 1
相
手臂组
臂 | 干预/治疗 |
---|---|
Experimental: Trial 1 Water Intervention: In one of the 3 cycling trials, participants will receive only water and no carbohydrate supplementation during the 2 hour cycling challenge. | Dietary Supplement: Trial 1 Water will be used as a control during one of the three cycling challenges (participants will not receive any carbohydrate supplementation). |
Experimental: Trial 2 Carbohydrate Gel Intervention: In one of the 3 cycling trials, participants will receive carbohydrate supplementation in the form of commercially available gels (15g every 15 minutes) during the 2 hour cycling challenge. | Dietary Supplement: Trial 2 Commercially available PowerBar PowerGel will be used for the carbohydrate gel condition during one of the three cycling challenges. |
Experimental: Trial 3 Potatoes Intervention: In one of the 3 cycling trials, participants will receive carbohydrate supplementation in the form of pureed russet potato (15g every 15 minutes) during the 2 hour cycling challenge. | Dietary Supplement: Trial 3 Pureed russet potatoes will be used as a carbohydrate supplement for participants during one of the three cycling challenges. |
资格标准
有资格学习的年龄 | 20 Years 至 20 Years |
有资格学习的性别 | All |
接受健康志愿者 | 是 |
标准 | Inclusion Criteria: - Male or female - ≥150 km/wk of cycling mileage - ≥6 months of prior training history - VO2peak values ≥45 ml/kg/min for females and ≥50 ml/kg/min for males - Aged between 20-40 years Exclusion Criteria: - Chronic Smoking or tobacco use - Active cardiovascular disease - Diabetes Mellitus or other metabolic disorders - Liver kidney, or urinary disease - Musculoskeletal/Orthopedic disorders (e.g., osteoarthritis, rheumatoid arthritis, tendinitis, gout, fibromyalgia, patellar tendinopathy, or chronic low back pain) - Neuromuscular disorders - hypertension - Diagnosed GI tract diseases - Heart Disease - Bleeding or clotting disorders - Neurological disease - Epilepsy - Respiratory disease - Pregnancy - Contraindications for exercise - <150 km/wk of cycling mileage - <6 months of prior training history - VO2peak values <45 ml/kg/min for females and <50 ml/kg/min for males |
结果
主要结果指标
1. Time trial performance measured in minutes [1 year]