Osteopenia, Sarcopenia
Conditions
Keywords
Ageing, Body Composition, Nutrition, Physical Activity
Brief summary
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.
Detailed description
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: 1. CON - a control group receiving a placebo nutrient support (per kg of body mass: 0.25g maltodextrin; energy \ 160 kcal per day) 2. PRO - a nutrient group receiving a nutrient support (per kg of body mass: 0.33g milk protein + 0.25ug vitamin D + 10mg calcium; energy \ 160 kcal per day) 3. PRO+PA - a nutrient group receiving a nutrient support (per kg of body mass: 0.33g milk protein + 0.25ug vitamin D + 10mg calcium; energy \ 160 kcal per day) and engaging in a prescribed physical activity (PA). 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.
Interventions
DIETARY_SUPPLEMENTCONTROL
Maltodextrin (generic) in powder form, flavoured and instantised to be dissolved in water.
DIETARY_SUPPLEMENTPROTEIN
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.
BEHAVIORALPHYSICAL ACTIVITY
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.
Sponsors
Phil Jakeman
Study design
Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
PREVENTION
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
ALL
Age
50 Years to 70 Years
Healthy volunteers
Yes
Inclusion criteria
* Conducted by a medical doctor and based on Grieg et al. Age and Aging 1994:23:185-189 being defined as 'healthy' (i.e. 'disease-free') free-living and fully mobile older subjects capable of completing the 6-month intervention
Exclusion criteria
* Contraindication identified by medical doctor based on Grieg et al. Age and Aging 1994:23:185-189 definition of 'healthy' (i.e. 'disease-free') free-living and fully mobile older subjects capable of completing the 6-month intervention
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Body Lean Tissue Mass (LTM) | Change from baseline in Lean Tissue Mass at 6 months | Body lean tissue mass measured by dual energy x-ray absorptiometry |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Bone Mineral Density | Change from baseline in Bone Mineral Density at 6 months | Site specific (Lumbar Spine and Femoral Neck) bone mineral density measured by dual energy x-ray absorptiometry |
Other
| Measure | Time frame | Description |
|---|---|---|
| Maximal voluntary contraction (MVC) and rate of force development (RFD) of the knee extensors [Muscle Function] | Change from baseline in Muscle Function at 6 months | 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. |
| Rate of force development (RFD) of the knee extensors [Muscle Function] | Change from baseline in Muscle Function at 6 months | 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. |
| Timed 1000m walk [Activities of Daily Living] | Change from baseline in Activities of Daily Living at 6 months | 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 |
| Chair Rise Test [Activities of Daily Living] | Change from baseline in Activities of Daily Living at 6 months | 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 |
Outcome results
None listed