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The focus is healthy ageing, i.e. delaying the deterioration in health status in older adults. Loss of lean tissue (skeletal muscle) mass, a process termed sarcopenia, or bone tissue mass, a process called osteopenia, is a consequence of aging per se, modified by nutrition and lifestyle behaviour.
The aim is to conduct a study of body composition, physical activity, muscle function and ability to undertake activities of daily living in older Irish men and women and to investigate the effect of a six month period of nutrient support, or nutrient plus physical activity on lean tissue mass and function and bone mass in men and women aged 50 to 70 years.
Study Design: The study is a convenience population study and 6-month randomised control trial (RCT) of men and women age 55 to 70 years.
The study groups (n=60 per group) for the RCT are:
Subject recruitment: Men and women, age 50 to 70 years, will be recruited through the UL Body Composition Study, by email advertisement, GP-exercise referral scheme, feature article(s) in the local media and word of mouth.
Requirement of the participants.
On entry each subject will undertake a preliminary assessment as follows:
i. medical history and examination by a qualified medical doctor ; ii. provide a blood and urine sample to be evaluated by a qualified medical doctor; iii. food intake evaluated by a qualified dietician; iv. whole body and segmental body composition analysis (DXA); v. habitual physical activity level (PAL) vi. measurement of muscle function and performance in simulated activities of daily living.
One month following the preliminary assessment subjects will be invited to participate in a 6 month intervention programme of nutrient or nutrient plus physical activity. Consenting subjects will be randomly assigned to one of the three study groups stated above.
Upon completion (6 months), subjects will be re-assessed as follows; i. provide a blood and urine sample; ii. whole body and segmental body composition analysis (DXA); iii. measurement of muscle function and performance in simulated activities of daily living.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| CONTROL | Placebo Comparator | a group of subjects receiving a placebo nutrient supplement (per kg of body mass: 0.25g maltodextrin; energy ~ 160 kcal per day) in two equal portions at the two low protein meals of the day, i.e. breakfast and lunch every day for a period of 24 weeks |
|
| PROTEIN | Active Comparator | a group of subjects receiving a nutrient supplement (per kg of body mass: 0.33g milk protein + 0.25ug vitamin D + 10mg calcium; energy ~ 160 kcal per day) in two equal portions at the two low protein meals of the day, i.e. breakfast and lunch every day for a period of 24 weeks |
|
| PROTEIN+PHYSICAL ACTIVITY | Active Comparator | a group of subjects receiving a nutrient supplement (per kg of body mass: 0.33g milk protein + 0.25ug vitamin D + 10mg calcium; energy ~ 160 kcal per day) in two equal portions at the two low protein meals of the day, i.e. breakfast and lunch every day for a period of 24 weeks plus a prescribed regimen of physical activity |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| CONTROL | Dietary Supplement | Maltodextrin (generic) in powder form, flavoured and instantised to be dissolved in water. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Body Lean Tissue Mass (LTM) | Body lean tissue mass measured by dual energy x-ray absorptiometry | Change from baseline in Lean Tissue Mass at 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| Bone Mineral Density | Site specific (Lumbar Spine and Femoral Neck) bone mineral density measured by dual energy x-ray absorptiometry | Change from baseline in Bone Mineral Density at 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| Maximal voluntary contraction (MVC) and rate of force development (RFD) of the knee extensors [Muscle Function] | Maximal voluntary contraction (MVC) in Nm (force in Newtons, distance in metres) torque of the knee extensors measured by ergometry will be used to assess Muscle Function. | Change from baseline in Muscle Function at 6 months |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Philip M Jakeman, BSc MSc PhD | University of Limerick | Principal Investigator |
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| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 27933408 | Derived | Francis P, Mc Cormack W, Toomey C, Norton C, Saunders J, Kerin E, Lyons M, Jakeman P. Twelve weeks' progressive resistance training combined with protein supplementation beyond habitual intakes increases upper leg lean tissue mass, muscle strength and extended gait speed in healthy older women. Biogerontology. 2017 Dec;18(6):881-891. doi: 10.1007/s10522-016-9671-7. Epub 2016 Dec 8. | |
| 26581685 |
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| ID | Term |
|---|---|
| D055948 | Sarcopenia |
| D001851 | Bone Diseases, Metabolic |
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D009133 | Muscular Atrophy |
| D020879 | Neuromuscular Manifestations |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
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| ID | Term |
|---|---|
| C008315 | maltodextrin |
| D011506 | Proteins |
| D015444 | Exercise |
| ID | Term |
|---|---|
| D000602 | Amino Acids, Peptides, and Proteins |
| D009043 | Motor Activity |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
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| PROTEIN | Dietary Supplement | The milk protein matrix (PROTEIN) comprised a 9:2:1 ratio of milk protein concentrate (MPC, 80% (w/w protein) Glanbia Nutritionals, Kilkenny, Ireland), whey protein concentrate hydrolysate, degree of hydrolysis 32% (WPC DH 32, 78% (w/w protein) Carbery Ingredients, Ballineen, Ireland), whey protein isolate hydrolysate, degree of hydrolysis 45% (WPI DH 45, 75% (w/w protein) Glanbia Nutritionals). The total protein content was 72.7g/100g powder. The protein matrix was supplemented with 2187mg/100g powder of milk-based calcium (Trucal™, Glanbia) and 57.3mg/100g powder vitamin D3 (cholecalciferol), flavoured and instantised to be dissolved in water. |
|
|
| PHYSICAL ACTIVITY | Behavioral | A structured, progressive programme of exercises using resistance exercise bands supervised by clinical therapists undertaken three times per week for 24 weeks of the intervention. |
|
|
| Rate of force development (RFD) of the knee extensors [Muscle Function] |
Rate of force development (RFD) in Nm/s (force in Newtons, distance in metres, time in seconds) torque of the knee extensors measured by ergometry will be used to assess Muscle Function. |
| Change from baseline in Muscle Function at 6 months |
| Chair Rise Test [Activities of Daily Living] | The number of completed Chair Rise (i.e. rise from a seated to a standing position) in 30 seconds will be used to assess Activities of Daily Living | Change from baseline in Activities of Daily Living at 6 months |
| Timed 1000m walk [Activities of Daily Living] | The time (time in seconds) to complete 1000 metres (distance in metres) performed in a indoor track will be used to assess Activities of Daily Living | Change from baseline in Activities of Daily Living at 6 months |
| Derived |
| Norton C, Toomey C, McCormack WG, Francis P, Saunders J, Kerin E, Jakeman P. Protein Supplementation at Breakfast and Lunch for 24 Weeks beyond Habitual Intakes Increases Whole-Body Lean Tissue Mass in Healthy Older Adults. J Nutr. 2016 Jan;146(1):65-9. doi: 10.3945/jn.115.219022. Epub 2015 Nov 18. |
| D001284 | Atrophy |
| D020763 | Pathological Conditions, Anatomical |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D012816 | Signs and Symptoms |
| D001847 | Bone Diseases |
| D009140 | Musculoskeletal Diseases |
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
| D001519 | Behavior |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |