Effects of Hipopressive Exercises in Nonspecific Low Back Pain

Visual Analog Scale. The participants are asked to mark the intensity of pain from 1 to 10, with 1 being almost non-existent and 10 being the worst pain imaginable.

Oswestry Low Back Pain Disability Scale.

Oswestry Low Back Pain Scale: The questionnaire consists of 10 questions in which he assesses the impact of the patient's back pain on daily life activities:

• Intensity of perceived pain
• Personal care
• Lift weight
• Walk
• Sit
• Standing
• Sleeping
• Sex life
• Social life
• traveling There are 6 possible answers to each item being scored from 0 to 5, so that when completing the questionnaire, the scores of each item are added, multiplied by two, and we obtain a percentage over 100 of the degree of disability.

The evaluation of muscle pain was performed by algometry. The algometer evaluates the perceptual sensitivity of the pain through the pressure threshold looking for the stimulation of the nociceptors with a minimum pressure necessary to trigger discomfort at a certain point and the tolerance of the patient. The evaluator locates the point and places the pointer of the perpendicular algometer increasing the pressure force with a constant speed of 1Kg / cm² / s in a uniform and continuous way until the perception of the sensitive point, the patient informs the evaluator, he stops exerting pressure and take the corresponding record, so that the evaluator can not see the results. Between measurements, an interval of 30 seconds is left.

Lumbar flexibility. It was measured with the Sit-and-reach (SR) test. It has been used to assess the overall flexibility on the finger-floor distance method. The test is conducted with a box designed for this purpose which has a vertical scale with a range of 50 cm (25 cm negative and 25cm positive). The subject remains standing on it, leaving the arms and trunk relaxed, then flexes the trunk forward and maintains its maximum flexion for 3 seconds. The evaluator is placed next to the scale and records the furthest measurement touched by the fingertips of both hands. If each hand reaches a different measurement, then the shortest one is registered. This is repeated 3 times and the most favourable measurement is registered.

SF-36 is a health questionnaire, both physical and metal. It contains 36 items comprising 8 health status sub-scales. It includes different dimensions (Bodily Pain, Perceptions, Mental Health, Physical Function, Role-physical, Role-emotional, Social Function, and Vitality). Positive and negative health statuses are assessed. To evaluate each dimension, the items are transformed on a scale from 0 to 100. The result is obtained by summation of all the questions, in which 0 is the worst and 100 the best result and state of health.