The aim of this randomized controlled study is to explore the hypoalgesic response of a 6 minutes of intermittent walking apneas training session at low lung volume in healthy subjects; also, as secondary objectives, to analyze the cardiovascular and respiratory response produced during the intervention.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
60
Walking apnea at low Lung Volume Participants walk at 6 km/h (10% slope) on treadmill for 6 minutes. Participants in the experimental group will perform intermittent apneas at high lung volume with a density of 5 seconds, followed by a normal breath of 5 seconds until completing the 6 minutes)
Participants walk at 6 km/h (10% slope) on treadmill for 6 minutes. Participants in the control group will remain breathing normally for these 6 minutes.
CSEU LaSalle
Madrid, Spain
RECRUITINGPain pressure threshold (PPT) on thumb, anterior tibial and spinous process of C7
PPT is tested on the dorsal base of the distal phalanx of the thumb on the dominant side and on the muscle belly of the tibialis anterior on the dominant side. The region to be pressed is marked with a pen. The patient is instructed to report with the first appearance of the sensation of "discomfort". An ascending ramp of 0.5 kg/cm/s is applied, at the rhythm of a metronome. The measurement is started on the thumb, and alternated with tibia and C7 until 3 measurements of each region are obtained, enough time to give 30 seconds of rest between measurements in the same region. This protocol has demonstrated high inter-observer reliability measuring healthy subjects (ICC = 0.91).
Time frame: before and after intervention (up 30 minutes)
Perceived Stress Scale (PSS)
14-item questionnaire about their thoughts and feelings in the last month. The scale has a range of scores from 0 to 56. The lower the score, the more favorable for the patient's health.
Time frame: before intervention (up 5 minutes)
Pittsburg Sleep Quality Index (PSQI)
9-item questionnaire on sleep quality in the past month The scale has a range of scores from 0 to 21. The lower the score, the more favorable for the patient's health.
Time frame: before intervention (up 5 minutes)
Global Physical Activity Questionnaire (GPAQ)
6-item questionnaire on the level of physical activity at work, for commuting and in leisure time.
Time frame: before intervention (up 5 minutes)
Oxygen saturation
Oxygen saturation will be measured during the procedure by finger pulse oximetry.
Time frame: during intervention (up 6 minutes)
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Blood pressure
Systolic and diastolic blood pressure will be measured before, during and immediately after the procedure using a digital wrist sphygmomanometer.
Time frame: before and after intervention (up 10 minutes)
Rate of perceived exertion (RPE)
RPE Borg CR-10 is used to measure how hard your body works during physical activity. It runs from 0 - 10, using numbers to rate how much effort an activity takes.
Time frame: immediately after intervention (up 10 seconds)
Heart rate
Heart rate will be measured during the procedure by finger pulse oximetry.
Time frame: during intervention (up 6 minutes)