Aging
Conditions
Keywords
Muscle Power, Functional capacity
Brief summary
The primary aim of this study is to optimize the methodology to measure lower limb power in older adults, so that clinicians are able to detect functional problems in this population earlier.
Detailed description
Aging is associated with slower movement patterns, a higher fall risk and a restriction in functionality. This will lead to an increase in the number of dependent elderly and a high socio-economic burden. From the age of 40, a systematic loss of muscle mass and muscle force, also known as sarcopenia, will occur. In addition, performing daily tasks requires the production of muscle force at a certain speed. The product of force and speed, power, decreases even earlier and faster than muscle force. This power is typically measured with specialized equipment, which limits the large-scale applicability. With the help of accelerometry there is the possibility to measure power during more functional tasks and movements, which benefits the applicability, but the reliability, reference values and link with other outcome measurements related to sarcopenia has to be investigated.
Interventions
DIAGNOSTIC_TESTMuscle function test
Body measurements, power and strength tests of the knee extensor muscle, handgrip strength, functional capacity tests, objective measurement of physical activity (subgroup of older adults, n=50)
Sponsors
Universitaire Ziekenhuizen KU Leuven
Study design
Observational model
CASE_CONTROL
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
20 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Age \>20
Exclusion criteria
* Unstable cardiovascular diseases * Fever or acute infection * Cognitive or physical malfunctioning that hinders the understanding or performance of tests and/or instructions
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Physical activity | 1 week | Objective measurement of physical activity in a subgroup of older participants (n=50) by means of accelerometry |
| Lower limb muscle power during a stair climb test | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | The power (watt) needed to perform stair climbing is calculated using a 3D accelerometer (DynaPort MoveTest, McRoberts), worn at the back of the participant |
| Number of steps/stairs a day | 1 week | Objective measurement of physical activity in a subgroup of older participants (n=50) by means of accelerometry |
| Lower limb muscle power during a sit-to-stand test | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | The power (watt) needed to perform 5 sit-to-stand transitions and a 30 sec. sit-to-stand test is calculated using a 3D accelerometer (DynaPort MoveTest, McRoberts), worn at the back of the participant |
| Reliability of power measurements measured with a 3D accelerometer | 1 test moment of approximately 30 minutes, planned between September 2019 and July 2020 | Reliability of power measurements (watt) measured with a 3D accelerometer (DynaPort MoveTest, McRoberts) worn during functional activities (stair climbing, sit-to-stand test) three times within a period of 2 weeks |
| Rate of power (force-velocity) development | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Participants perform a test protocol on a Biodex Dynamometer. The rate of power development (watt/s) is defined as the linear slope of the power-time curve and is measured from the onset of movement till peak power. |
| Handgrip strength | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Handgrip strength (kg) evaluated with a Jamar dynamometer |
| Jumping height | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Jumping height (in cm) measured during a standardized jump test |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| 6min walk distance | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | The walk distance (in m) covered in 6 min. |
| Balance | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Number of seconds a participant can hold a tandem stand, a semi-tandem stand or with the feet together |
| Maximal gait speed | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | The average speed to walk 3m as fast as possible (in m/s) |
| Usual gait speed | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | The average speed to walk 4m at a usual pace (in m/s) |
| Maximal isometric strength | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Maximal strength (Nm) is measured by means of unilateral isometric knee-extensor tests on a Biodex Dynamometer |
| Maximal isokinetic strength | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Maximal strength (Nm) is measured by means of unilateral isokinetic knee-extensor tests on a Biodex Dynamometer |
| Number of repetitions during a 30s sit-to-stand test | 1 test moment of approximately 1 hour, planned between September 2019 and July 2020 | Number of complete sit-to-stand transitions in 30 sec. |
Countries
Belgium
Outcome results
None listed