Impact of Knee Extension Brace on Quadriceps Electromyography Activity During Active Straight Leg Rise
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 发起方
- 入组人数
- 20
- 试验地点
- 1
- 主要终点
- Comparison between RF from p1 (ASLR without orthosis) to RF from p2 (ASLR with orthosis, without any command)
研究概览
简要总结
The main objective of this study is to evaluate quadriceps thigh muscle activity during active straight leg raise (ASLR) with a knee brace.
An additional aim of the study is to evaluate quadriceps activity during straight leg raise with a knee brace in a variable command and manner of task performance. The study will be conducted on a group of healthy individuals aged 18 - 35 years. Height and weight were measured using a scale and centimetre tape. Then, according to the study protocol, specific measurements will be taken of the rectus femoris, medial vastus and lateral vastus muscles using surface EMG of a non-invasive nature.
Study participants will undergo the following measurements:
- Measurement of the MVIC (maximum voluntary isometric contraction) of the quadriceps of the thigh, in a sitting position with the lower leg flexed to 90 degrees and in knee extended (0 degrees).
- Measurement of muscle activity during elevation of the straightened lower limb in a supine position without an orthosis.
- Measurement of muscle activity during straight leg raise in supine position with knee brace (default and different commends).
详细描述
The study will be conducted on a group of healthy individuals aged 18 - 35 years. After an interview confirming that the subject does not have exclusion criteria and inclusion criteria apply. Written consent to participate in the study and next anthropometric measurements will be taken using a scale and tape measure. The subjects will be informed in detail about the procedure and the form of the measurements, the way in which they are to be taken, and will be familiarized with the measuring instruments and their principles of operation. Then, in accordance with the study protocol, specific measurements will be taken of the rectus femoris, medial vastus and lateral vastus muscles using surface EMG of a non-invasive nature.
Study participants will undergo the following measurements:
- Measurement of the MVIC (maximum voluntary isometric contraction) of the quadriceps femoris, in a sitting position with the lower leg flexed to 90 degrees, next MVIC of the quadriceps femoris in supine with knee fully extended (0 degrees).
- Measurement of muscle activity during elevation of the straightened lower limb (ASLR) in supine without knee brace.
- Measurement of muscle activity during ASLR in supine position with knee brace. Ad.a. Measurement of quadriceps maximum electric signal of the dominant lower limb using surface EMG in a seated position with the trunk stabilized with hands behind the pelvis and the lower leg flexed to 90 degrees, stabilized in the distal part (without taking the foot) against a stationary object (belt) to execute maximal volitional isometric quadriceps muscle contraction. Next MVIC in supine position, with knee fully extended, pushing back of the knee into hand of an examiner without lifting heel.
Ad.b. Measurement of quadriceps excitability using surface EMG in supine position without orthosis. The subject raises the tested limb (dominant) by touching the anterior surface of the tibia to a pole set at 30 cm at first sound of metronome set at 60 BMP, then hold the leg for the next beat, and next lowers the limb at the next metronome sound. This action is repeated three times in a row without any brake.
Ad.c. Measurement of quadriceps excitability of the dominant lower limb using surface EMG in supine position with knee extension brace on. Measurement performed in three variants:
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •age between 18-35 years
- •no contraindications to exercise
- •ability to perform the required commands without pain or discomfort
- •full range of motion of the knee joint.
排除标准
- •those with a history of knee and/or hip surgery
- •damage to ligamentous structures of the knee joint in the past treated conservatively or meniscus treated conservatively.
- •muscle and tendon injury of the knee joint area in the past 3 months.
结局指标
主要结局
Comparison between RF from p1 (ASLR without orthosis) to RF from p2 (ASLR with orthosis, without any command)
时间窗: through study completion, an average of 1 year
It was decided to choose RF and generalize it to whole quadriceps femoris, thus decide what is the impact of the extension brace on EMG quadriceps signal
次要结局
- Muscle (RF, VLO, VMO) comparison between trials and inside every trial(through study completion, an average of 1 year)
研究者
Mateusz Kamiński
MSc PT
Józef Piłsudski University of Physical Education