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

Cryotherapy Effect Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02499640
• Other study ID #: 51903/2012
• Status: Completed
• Phase: N/A
• First received: July 14, 2015
• Last updated: July 15, 2015
• Start date: September 2014
• Est. completion date: May 2015

Study information

• Verified date: July 2015
• Source: Paulista University
• Contact: n/a
• Is FDA regulated: No
• Health authority: Brazil: National Committee of Ethics in Research
• Study type: Interventional

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 100
• Est. completion date: May 2015
• Est. primary completion date: May 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 30 Years

Eligibility

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.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Prevention

Related Conditions & MeSH terms

• Cryotherapy Effect

Intervention

Other:
• immersion cold water
immersion cold water at different temperatures and exposure times

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Paulista University

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change from Baseline in indices of heart rate variability at 60 minutes		20, 30, 40, 50 and 60 minutes post-exercise	No