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Funding
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Two of the most effective lifestyle-based approaches to reduce the risk of adverse health events and enhance quality of life with aging are exercise and a healthy diet. Currently, the Canadian recommended dietary allowance (RDA) for protein is 0.8 g/kg/day, however, several expert groups have advocated for a higher RDA of protein (~1.2 g/kg/day), along with more evenly distributed daily consumption, in older persons. Eggs are considered a nutrient-rich protein source but have recently been scrutinized. This study will compare a high-protein, egg-containing diet and a high-protein, non-egg diet in healthy older persons.
This study will examine the impacts of an egg-containing diet and a non-egg diet in healthy older persons. Briefly, participants (healthy persons, age 60-75 years old) will consume their normal diet or their normal diet plus 4 eggs completing a structured exercise program (designed to meet Canada's Physical Activity Guidelines) for a total of 12 weeks. Participants will be randomly assigned to the Egg or Control (non-egg) group. Before and after the 12-week intervention, participants' undergo assessments of diet-quality, muscle health, fitness, bone health, and vascular health.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Exercise | Placebo Comparator | Exercise |
|
| Exercise + Diet | Active Comparator | Exercise + eggs |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Exercise | Behavioral | Participants will exercise in a supervised facility twice weekly and consume their habitual diet. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Dietary protein intake. | Dietary protein intake (specifically meal-to-meal distribution) will be measured in all participants using a 3-day food log. | Pre- and post-intervention over 12 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Change in lean mass | Composition by DXA | Pre- and post-intervention over 12 weeks |
| Strength | Handgrip strength | Pre- and post-intervention over 12 weeks |
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Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Stuart Phillips, Ph.D. | McMaster University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Ivor Wynne Centre | Hamilton | Ontario | L8S 4L8 | Canada |
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| ID | Term |
|---|---|
| D055948 | Sarcopenia |
| ID | Term |
|---|---|
| D009133 | Muscular Atrophy |
| D020879 | Neuromuscular Manifestations |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
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| ID | Term |
|---|---|
| D015444 | Exercise |
| D004032 | Diet |
| D004531 | Eggs |
| ID | Term |
|---|---|
| D009043 | Motor Activity |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |
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The study will be a randomized parallel-group trial
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| Exercise plus diet (egg) | Behavioral | Participants will exercise in a supervised facility twice weekly and consume an addiitonal 4 eggs per day. |
|
| Vascular health | Measures of arterial compliance | Pre- and post-intervention over 12 weeks |
| Change in body fat mass | Composition by DXA | Pre- and post-intervention over 12 weeks |
| D001284 | Atrophy |
| D020763 | Pathological Conditions, Anatomical |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D012816 | Signs and Symptoms |
| D009747 | Nutritional Physiological Phenomena |
| D000066888 | Diet, Food, and Nutrition |
| D010829 | Physiological Phenomena |
| D005502 | Food |
| D019602 | Food and Beverages |