Study: NCT01795443

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - no vibration
Description: The movements required are performed without vibration.~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - no vibration
Description: The movements required are performed without vibration.~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - low vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Measures - high vibration
Description: The movements required are performed with low frequency vibration (20 Hertz on following device: VIBRALGIC 5; manufacturer = Electronique Conseil).~The movement required is flexion - extension of the lumbar spine without moving the shoulders; it is a pelvic rocking motion. The patients will be helped to the target position by the investigator. After keeping the target position for 5 seconds, they will be asked to completely pivot the pelvis to a forward position, then return to the target position. This test is repeated five times.~The investigator measures the lumbar angle using an electronic goniometer twice during each of the five tests: once after the patient is helped to the target angle, and once after the patient tries to remember the target angle by his/herself.