Muscle Loss
Conditions
Brief summary
The primary aim of the current research project is to investigate the effect of carnitine supplementation on muscle strength and body composition. A secondary aim of this project is to explore the effect of circulating trimethylamine N-oxide elevation, induced by carnitine supplementation on muscle strength and body composition.
Interventions
Sponsors
Study design
Eligibility
Inclusion criteria
* must be able to swallow tablets
Exclusion criteria
* cardiovascular disease * liver disease * kidney disease * neuromuscular disease * gastrointestinal disorders (including stomach ulcers and erosions) * diabetes * other severe chronic diseases
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Muscle Strength using Biodex System 4 Pro dynamometer | 24 weeks | Peak torque measured by performing maximum voluntary contractions during isometric knee extension and flexion. The test performed in concentric-concentric mode consisting maximum 4-s knee extensor isometric contraction and maximum 4-s knee flexor isometric contraction, separated by 20-s recovery, repeated three times. Muscle isokinetic strength assessed in 5 repetitions of flexion and extension at a speed of 60°/s. Muscle endurance assessed in 10 repetitions at 300°/s determine the ability of the muscle to maintain the work. Strength testing performed on the Biodex System 4 Pro dynamometer. |
| Body Composition: Body Fat Mass, Fat Free Mass, and Skeletal Muscle Mass using a bioelectrical impedance analyzer (InBody720) | 24 weeks | The InBody720 measures impedance of five segments of the body (each arm, each leg, trunk) at frequencies of 1, 5, 50, 250, 500, and 1000 kHz through the 8-polar tactile-electrode. Based on the impedance, body fat mass, fat free mass, and skeletal muscle mass are calculated. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Plasma trimethylamine N-oxide concentration | 24 weeks | Blood samples taken before the start and after finishing the supplementation protocol. Plasma trimethylamine N-oxide determined using ultra performance liquid chromatography - tandem mass spectrometer (UPLC-MS/MS) method |