The Effect of Diet Composition on Performance, Expenditure, Blood Lipids, and Appetite Hormones in Highly Trained Cyclists (DCAP)
The Effect of Diet Composition on Performance, Energy Expenditure, Blood Lipids and Lipoproteins, and Cognitive Function and Mood States in Highly Trained Cyclists
調査の概要
詳細な説明
Traditionally, a high carbohydrate diet is recommended for elite endurance athletes and sub-elite, highly trained recreational athletes competing in endurance events. However, recently the ketogenic diet (extremely low carbohydrate content) has become popular in these populations. The effect on endurance exercise performance, energy expenditure, postprandial blood profiles, and cognitive function and mood states requires further investigation.
In this study, highly trained recreational cyclists and triathletes will adhere to each diet (high-carbohydrate and ketogenic) for 14 days in a crossover design. Experimental trials at baseline and after each diet will evaluate endurance cycling performance (time trial), resting energy expenditure, the thermic effect of food of test meals corresponding in composition to each diet, postprandial responses of blood lipids, glucose and appetite hormones, and cognitive function and mood states.
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Texas
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Fort Worth、Texas、アメリカ、76129
- Texas Christian University
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- >100-150km of cycling per week
- VO2max > 80th percentile for sex and age (adjusted for cycle ergometry)
- apparently healthy
Exclusion Criteria:
- weight loss supplements/medications/diet
- extreme dietary patterns (e.g. extremely high or low carbohydrate)
- nicotine use
- heavy alcohol use (>7 drinks/week female; >14 drinks/week male)
- food allergies
- diabetes
- heart disease
- stroke
- liver/kidney/thyroid disease
- anemia
- eating disorders
- uncontrolled hypertension
- pulmonary/orthopedic/musculoskeletal problems that prevent exercise
- surgery that affects swallowing and digestion
- claustrophobia
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:基礎科学
- 割り当て:ランダム化
- 介入モデル:クロスオーバー割り当て
- マスキング:なし(オープンラベル)
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的:High Carbohydrate Diet
Participants will consume a high carbohydrate diet (65-75% of total energy intake).
Protein intake will be standardized at 15% of total energy intake.
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Participants will consume each diet for 14 days in a crossover design.
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実験的:Ketogenic Diet
Participants will consume a low carbohydrate diet (<5-10% of total energy intake).
Protein intake will be standardized at 15% of total energy intake.
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Participants will consume each diet for 14 days in a crossover design.
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Endurance Cycling Performance
時間枠:180 min after the meal begins
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Time to completion in a 30-kilometer simulated time trial
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180 min after the meal begins
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Respiratory Exchange Ratio
時間枠:Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Indirect calorimetry fasted, postprandial, and during exercise
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Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Muscle Fuel Rating
時間枠:Change from baseline at 180 min and 240 min after the meal begins
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Ultrasound echogenicity of Rectus Femoris
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Change from baseline at 180 min and 240 min after the meal begins
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Oxygen consumption (VO2)
時間枠:At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Indirect calorimetry during exercise
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At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Rating of Perceived Exertion (RPE)
時間枠:At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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6-20 Borg's scale during exercise
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At 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Thermic Effect of Food (postprandial energy expenditure)
時間枠:Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min after the meal begins
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Fasted vs. postprandial indirect calorimetry
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Change from baseline at 30 min, 60 min, 90 min, 120 min, 150 min, 180 min after the meal begins
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Subjective appetite ratings
時間枠:Change from baseline at 60 min, 120 min, 180 min after the meal begins
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Visual Analog Scale (Scale 1: Perception of Hunger [0-100 mm]; Scale 2: Perception of Fullness [0-100 mm]; Scale 3: Desire to Eat [0-100 mm]
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Change from baseline at 60 min, 120 min, 180 min after the meal begins
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Appetite hormones including ghrelin, leptin, insulin, and Peptide-YY
時間枠:Change from baseline at 30 min, 60 min, 120 min, 180 min and 240 min
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Fasted, postprandial & post exercise blood concentration of appetite hormones
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Change from baseline at 30 min, 60 min, 120 min, 180 min and 240 min
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Blood glucose
時間枠:Change from baseline at 180 min and 240 min after the meal begins; on day 7 of each diet
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Fasted, postprandial & post exercise blood concentration of glucose
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Change from baseline at 180 min and 240 min after the meal begins; on day 7 of each diet
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Blood pressure
時間枠:Change from baseline at 180 min after the meal begins
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Fasted, postprandial & post exercise
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Change from baseline at 180 min after the meal begins
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Cognitive function
時間枠:At 180 min and 240 min after the meal begins
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Stroop test
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At 180 min and 240 min after the meal begins
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Mood state questionnaire
時間枠:At 180 min and 240 min after the meal begins
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Abbreviated Profile of Mood States; 40-item scale; Likert scale from 0 = "not at all" to 4 = "extremely"
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At 180 min and 240 min after the meal begins
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Resting Metabolic Rate
時間枠:At baseline before meal begins
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Indirect calorimetry in fasted state
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At baseline before meal begins
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Blood lipids including (triglycerides, total cholesterol, low density lipoprotein, and high-density lipoprotein)
時間枠:Change from baseline at 30 min, 60 min, 120 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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Fasted and postprandial in mg/dL
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Change from baseline at 30 min, 60 min, 120 min, 180 min, 192 min, 204 min, 216 min, 228 min and 240 min after the meal begins
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協力者と研究者
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
その他の研究ID番号
- CT2019MS3
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
IPD プランの説明
IPD 共有時間枠
IPD 共有アクセス基準
IPD 共有サポート情報タイプ
- 研究プロトコル
- 統計分析計画 (SAP)
- 分析コード
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米国で製造され、米国から輸出された製品。
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。
Dietの臨床試験
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Mondelēz International, Inc.KGK Science Inc.完了
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Utah State UniversityGreenAcres Foundation積極的、募集していない
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piero portincasaKing's College London; Uppsala University; University of Coimbra; Technical University of Munich; Martin-Luther-Universität... と他の協力者まだ募集していません
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International Centre for Diarrhoeal Disease Research...募集