Musical Auditory Stimulation and Exercise
Condition: Autonomic Nervous System; Cardiorespiratory Parameters
Study type: Interventional

Summary: 
      Check the effects of musical auditory stimulation on the autonomic modulation and
      cardiorespiratory parameters during and after aerobic exercise. Hypothesized that classical
      music can increase recovery velocity after exercise and rock style music can generate a delay
      in the recovery velocity of the cardiorespiratory parameters and in the cardiac autonomic
      response.
    

Detailed description: 
      To implement the experimental protocol, all volunteers were informed to not ingest alcoholic
      or caffeine-based drinks for 12 hours before the experimental procedure; consuming light meal
      only two hours before and avoid any vigorous physical exertion 24 hours before the testing.

      The experimental procedures were divided into three segments, all performed on a treadmill,
      with a minimum interval of 48 hours between them in order to allow the volunteers to recover.
      The protocols running time was always set between 5:30 PM and 9:30 PM, to avoid circadian
      influences. In addition to these, temperature was fixed between 23 ° C and 24 ° C and
      humidity between 60% and 70%.

      Before the first phase of the experimental protocol the volunteers were approved and the
      investigators obtained body mass by means of a digital scale (Plenna, TIN 00139 Maxima,
      Brazil) then height, by means of a stadiometer (ES 2020 - Sanny, Brazil). The comparable
      stages of the experimental protocol were undertaken:

      I) Maximal exercise test: the investigators undertook this to record the maximum velocity
      (Vmax) reached by the volunteer. This was then applied to indirectly determine the anaerobic
      threshold via the Conconi threshold. Intensity of 60% of the Vmax obtained in the test was
      lesser than that found in the anaerobic threshold, and this intensity was enforced to perform
      subsequent steps;

      II) Control Protocol (CP): In this period the volunteers were at rest, in the supine position
      for 15 minutes, followed by 30 minutes of aerobic exercise on a treadmill (five minutes at a
      speed of 6.0 km / h followed by 25 minutes with 60% of Vmax + 1% grade) and then a recovery
      period lasting 60 minutes (three minutes standing on the treadmill followed by 57 minutes in
      the supine position). The volunteers were instructed to remain awake during all the protocol
      and this was verified and monitored by one of the researchers.

      III) Music Protocol (MP): Volunteers accomplished the same activities of the CP, but with
      exposure to musical auditory stimulation during exercise and recovery.
    

Intervention name(s): Control Protocol; Classical Music Protocol; Rock Music Protocol
Intervention type(s): Other; Other; Other
Intervention description(s): In this period the volunteers were at rest, in the supine position for 15 minutes, followed by 30 minutes of aerobic exercise on a treadmill (five minutes at a speed of 6.0 km / h followed by 25 minutes with 60% of Vmax + 1% grade) and then a recovery period lasting 60 minutes (three minutes standing on the treadmill followed by 57 minutes in the supine position). The volunteers were instructed to remain awake during all the protocol and this was verified and monitored by one of the researchers.; Volunteers accomplished the same activities of the control protocol, but with exposure to classical music during exercise and recovery.; Volunteers accomplished the same activities of the control protocol, but with exposure to rocky musical style during exercise and recovery.
Allocation: Randomized
Intervention model: Crossover Assignment
Masking: Single (Participant)
Primary purpose: Other
Keywords: Autonomic Nervous System; Aerobic exercise; Recuperation; Music