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

• Sponsor: Paulista University (Other)
• Overall Status: Completed
• CT.gov ID: NCT02499640
• Collaborator: (none)
• Enrollment: 100
• Arms: 5
• Duration (Months): 8

Study Details

Study Description

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.

Condition or Disease	Intervention/Treatment	Phase
Cryotherapy Effect	Other: immersion cold water	N/A

Study Design

• Study Type: Interventional
• Actual Enrollment: 100 participants
• Allocation: Randomized
• Intervention Model: Parallel Assignment
• Masking: None (Open Label)
• Primary Purpose: Prevention
• Official Title: The Effects of Cold Water Immersion With Different Dosages (Duration and Temperature Variations) on Heart Rate Variability Post-exercise Recovery
• Study Start Date: Sep 1, 2014
• Actual Primary Completion Date: May 1, 2015
• Actual Study Completion Date: May 1, 2015

Arms and Interventions

Arm	Intervention/Treatment
No Intervention: GC Control group - CG (n = 20), which suffered no recuperative technique
Experimental: G1 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; immersion cold water at different temperatures and exposure times
Experimental: G2 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; immersion cold water at different temperatures and exposure times
Experimental: G3 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; immersion cold water at different temperatures and exposure times
Experimental: G4 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; immersion cold water at different temperatures and exposure times

Outcome Measures

Primary Outcome Measures

1. Change from Baseline in indices of heart rate variability at 60 minutes [20, 30, 40, 50 and 60 minutes post-exercise]

Eligibility Criteria

Criteria

• Ages Eligible for Study: 18 Years to 30 Years
• Sexes Eligible for Study: Male
• Accepts Healthy Volunteers: Yes

Inclusion Criteria:

• male sex

• healthy

• aged between 18 and 30 years

• classified as physically active through the International Physical Activity Questionnaire

Exclusion Criteria:

• smokers

• alcoholics

• use drugs that influenced cardiac autonomic activity

• cardiovascular, metabolic or endocrine diseases.

Contacts and Locations

Locations

No locations specified.

Sponsors and Collaborators

• Paulista University

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.

• Responsible Party: Franciele Marques Vanderle, PhD, Paulista University
• ClinicalTrials.gov Identifier: NCT02499640
• Other Study ID Numbers: 51903/2012
• First Posted: Jul 16, 2015
• Last Update Posted: Jul 16, 2015
• Last Verified: Jul 1, 2015

• Keywords provided by Franciele Marques Vanderle, PhD, Paulista University: Recovery of function; Autonomic nervous system; Heart rate variability; Cryotherapy; Immersion

Study Results

No Results Posted as of Jul 16, 2015