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This study seeks to compare the observed changes in resistance training adaptations (strength, performance, body composition, recovery, and lactate responses) after supplementation of isocaloric and isonitrogenous amounts of a novel plant protein formulation against changes observed in a pea/rice plant protein blend, whey protein, and a carbohydrate placebo in healthy resistance-trained men and women between the ages of 18-39.
This study seeks to compare the observed changes in resistance training adaptations (strength, performance, body composition, recovery, and lactate responses) after supplementation of isocaloric and isonitrogenous amounts of a novel plant protein formulation against changes observed in a pea/rice plant protein blend, whey protein, and a carbohydrate placebo in healthy resistance-trained men and women between the ages of 18-39.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Novel Plant Protein | Experimental | Novel plant protein blend containing 30 grams of protein taken twice per day for 8 weeks |
|
| Pea/Rice Protein | Active Comparator | Pea/Rice protein blend containing 30 grams of protein taken twice per day for 8 weeks |
|
| Whey Protein | Active Comparator | Whey protein blend containing 30 grams of protein taken twice per day for 8 weeks |
|
| Carbohydrate Placebo | Placebo Comparator | Carbohydrate placebo (maltodextrin) taken twice per day for 8 weeks |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Novel Plant Protein Blend | Dietary Supplement | Novel plant protein blend containing 30 grams of protein. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in 4-Compartment Lean Mass | Lean mass will be assessed using a 4-compartment model, which includes measurements of body density, total body water, and bone mineral content. | Week 0, Week 4, and Week 8 |
| Change in Perceptual Indicators of Training State | Participants will rate their readiness to train, soreness, recovery, energy, and sleep quality using 100-mm visual analog scales. Each scale is anchored with contextually appropriate statements such as "Lowest Possible" and "Highest Possible." | Week 0, Week 4, and Week 8 |
| Change in Profile of Mood States (POMS) Score | Mood state will be assessed using the Profile of Mood States (POMS) questionnaire, a validated tool for measuring transient affective states. The POMS consists of six subscales (Tension-Anxiety, Depression-Dejection, Anger-Hostility, Vigor-Activity, Fatigue-Inertia, and Confusion-Bewilderment), with a Total Mood Disturbance (TMD) score calculated by summing negative subscale scores and subtracting the Vigor score. Higher TMD scores indicate greater mood disturbance, while lower scores indicate improved mood state. | Week 0, Week 4, and Week 8 |
| Change in Pressure to Pain Threshold | Pressure pain threshold will be assessed using a digital algometer to determine the minimum pressure required to elicit pain. Higher scores indicate higher tolerance to pain. | Week 0, Week 4, and Week 8 |
| Change in Handgrip Strength | Maximal handgrip strength will be assessed using a calibrated hand dynamometer. Higher values indicate greater strength. | Week 0, Week 4, and Week 8 |
| Change in Isometric Mid-Thigh Pull Force |
| Measure | Description | Time Frame |
|---|---|---|
| Change in 4-Compartment Fat Mass | Fat mass will be measured using a 4-compartment model, which integrates body density, total body water, and bone mineral content. | Week 0, Week 4, and Week 8 |
| Change in 4-Compartment Fat-Free Mass |
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Inclusion Criteria
Exclusion Criteria
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| Name | Affiliation | Role |
|---|---|---|
| Chad Kerksick, PhD | Lindenwood University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Exercise and Performance Nutrition Laboratory | Saint Charles | Missouri | 63301 | United States |
IPD will not be shared
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| ID | Term |
|---|---|
| D000067816 | Whey Proteins |
| ID | Term |
|---|---|
| D008894 | Milk Proteins |
| D000080224 | Animal Proteins, Dietary |
| D004044 | Dietary Proteins |
| D011506 | Proteins |
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Randomized, Double-Blind, Placebo-Controlled, Parallel Design
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Supplements were blinded, in labeled containers. Each supplement will be of a similar volume, texture, and flavor, and labeled in indistinguishable packaging to ensure blinding.
| Pea/Rice Protein Blend | Dietary Supplement | Pea/Rice protein blend containing 30 grams of protein |
|
| Whey Protein | Dietary Supplement | Whey concentrate protein blend containing 30 grams of protein |
|
| Carbohydrate Placebo | Dietary Supplement | Maltodextrin placebo |
|
Maximal force output will be assessed using an isometric mid-thigh pull on a force plate, measured in Newtons. Higher scores equal greater force production |
| Week 0, Week 4, and Week 8 |
| Change in Hex Bar Deadlift One-Repetition Maximum (1RM) | Maximal hex bar deadlift strength will be assessed using a standardized one-repetition maximum (1RM) test. | Week 0, Week 4, and Week 8 |
| Change in Bench Press One-Repetition Maximum (1RM | Maximal upper-body strength will be assessed using a standardized one-repetition maximum (1RM) bench press test. | Week 0, Week 4, and Week 8 |
| Change in Isokinetic Peak Knee Extension Torque | Peak torque of the quadriceps will be assessed using an isokinetic dynamometer. Higher values indicate greater knee extensor strength. | Week 0, Week 4, and Week 8 |
| Performance in 5 Sets of Hex Bar Deadlift Protocol | Strength endurance will be assessed using a hex bar deadlift protocol consisting of 3 sets of 10 repetitions at 70% 1RM and 2 sets to failure at 80% 1RM. Repetition count and total volume lifted will be recorded. | Week 0, Week 4, and Week 8 |
Fat-free mass will be assessed using a 4-compartment model, providing a more precise measurement of body composition changes.
| Week 0, Week 4, and Week 8 |
| Change in 4-Compartment Percent Body Fat | Body fat percentage will be assessed using a 4-compartment model. | Week 0, Week 4, and Week 8 |
| Change in Total, Extracellular, and Intracellular Body Water | Hydration status will be measured using bioelectrical impedance analysis (BIA) to assess total, extracellular, and intracellular body water content. | Week 0, Week 4, and Week 8 |
| Change in Dry Fat-Free Mass | Dry fat-free mass will be assessed using a combination of dual-energy X-ray absorptiometry (DEXA) and bioelectrical impedance analysis (BIA) for a comprehensive measure of lean tissue mass. | Week 0, Week 4, and Week 8 |
| D000602 |
| Amino Acids, Peptides, and Proteins |
| D000067796 | Whey |
| D008892 | Milk |
| D003611 | Dairy Products |
| D005502 | Food |
| D000066888 | Diet, Food, and Nutrition |
| D010829 | Physiological Phenomena |
| D019602 | Food and Beverages |