The Effects of Cold Water Immersion With Different Dosages (Duration and Temperature Variations) on Heart Rate Variability Post-exercise Recovery

NCT02499640 | Completed

• 1 other identifier: 51903/2012
• Study Type: interventional
• Target: 100
• Locations: 0 countries
• Sites: N/A

Brief Summary

The aim of the present study was to investigate the effects of cold water immersion (CWI) during post-exercise recovery with different durations and temperatures on heart rate variability (HRV) indices. 100 participants performed a protocol of jumps and a Wingate test, and immediately afterwards were immersed in cold water, according to the characteristics of each group (CG: control; G1: 5' at 9±1°C; G2: 5' at 14±1°C; G3: 15' at 9±1°C; G4: 15' at 14±1°C). Analyses were performed at baseline, during the recuperative technique (TRec) by CWI and 20, 30, 40, 50 and 60 minutes post-exercise. The HRV indices average of all RR intervals in each analysis period (Mean RR), standard deviation of normal R-R intervals (SDNN), square root of the mean of the sum of the squares of differences between adjacent R-R intervals (RMSSD), spectral components of very low frequency (VLF), low frequency (LF) and high frequency (HF), scatter of points perpendicular to the line of identity of the Poincaré Plot (SD1) and scatter points along the line of identity (SD2) were assessed. Comparisons between groups and moments were performed using the technique of analysis of variance for repeated measures in two scheme factors. A significance level of p\<0.05 was considered.

Conditions

Cryotherapy Effect

Keywords

Recovery of function; Autonomic nervous system; Heart rate variability; Cryotherapy; Immersion

Outcome Measures

Primary Outcomes (1)

• Change from Baseline in indices of heart rate variability at 60 minutes

  20, 30, 40, 50 and 60 minutes post-exercise

Study Arms (5)

GC

NO INTERVENTION

Control group - CG (n = 20), which suffered no recuperative technique

G1

EXPERIMENTAL

G1 (n = 20) was subjected to a recovery procedure by immersion cold water for 5 minutes as from 9±1 degrees Celsius

Other: immersion cold water

G2

EXPERIMENTAL

G2 (n = 20) was subjected to a recovery procedure by immersion cold water for 5 minutes as from 14±1 degrees Celsius

Other: immersion cold water

G3

EXPERIMENTAL

G3 (n = 20) was subjected to a recovery procedure by immersion cold water for 15 minutes as from 9±1 degrees Celsius

Other: immersion cold water

G4

EXPERIMENTAL

G4 (n = 20) was subjected to a recovery procedure by immersion cold water for 15 minutes as from 14±1 degrees Celsius

Other: immersion cold water

Interventions

immersion cold water OTHER

immersion cold water at different temperatures and exposure times

G1; G2; G3; G4

Eligibility Criteria

• Age: 18 Years - 30 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• male sex
• healthy
• aged between 18 and 30 years
• classified as physically active through the International Physical Activity Questionnaire

You may not qualify if:

• smokers
• alcoholics
• use drugs that influenced cardiac autonomic activity
• cardiovascular, metabolic or endocrine diseases.

Sponsors & Collaborators

• Paulista University: lead

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PhD

Study Record Dates

• First Submitted: July 14, 2015
• First Posted: July 16, 2015
• Study Start: September 1, 2014
• Primary Completion: May 1, 2015
• Study Completion: May 1, 2015
• Last Updated: July 16, 2015

Record last verified: 2015-07