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Repeated cold-water immersion improves autonomic cardiac modulation following five sessions of high-intensity interval exercise

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European Journal of Applied Physiology Aims and scope Submit manuscript

Abstract

Purpose

The study aimed to investigate the effect of repeated cold-water immersion (CWI) after high-intensity interval exercise sessions on cardiac-autonomic modulation, neuromuscular performance, muscle damage markers, and session internal load.

Methods

Twenty-one participants underwent five sessions of high-intensity interval exercise (6–7 bouts of 2 min; pause of 2 min) over a two-week period. Participants were allocated randomly into either a group that underwent CWI (11-min; 11 °C) or a group that performed passive recovery after each exercise session. Before the exercise sessions were performed, countermovement jump (CMJ) and heart rate variability were recorded (i.e., rMSSD, low and high frequency power and its ratio, SD1 and SD2). Exercise heart rate was calculated by recording the area under the curve (AUC) response. Internal session load was evaluated 30 min after each session. Blood concentrations of creatine kinase and lactate dehydrogenase were analyzed before the first visit and 24 h after the last sessions.

Results

The CWI group presented higher rMSSD than the control group at each time point (group-effect P = 0.037). The SD1 was higher in CWI group when compared to the control group following the last exercise session (interaction P = 0.038). SD2 was higher in CWI group compared to the control group at each time point (group-effect P = 0.030). Both groups presented equal CMJ performance (P > 0.05), internal load (group-effect P = 0.702; interaction P = 0.062), heart rate AUC (group-effect P = 0.169; interaction P = 0.663), and creatine kinase and lactate dehydrogenase blood concentrations (P > 0.05).

Conclusion

Repeated post-exercise CWI improves cardiac-autonomic modulation. However, no differences in neuromuscular performance, muscle damage markers, or session internal load were demonstrated between the groups.

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Availability of data and material

The data presented in this study are available via request to the corresponding author. The data are not publicly available due to privacy.

Abbreviations

CMJ:

Countermovement jump

CWI:

Cold-water immersion

CK:

Creatine kinase

Δ%:

Percentage of change compared to baseline

GXT:

Graded exercise testing

HF:

High frequency

HF:LF:

Low frequency and high frequency ratio

HRV:

Heart rate variability

LDH:

Lactate dehydrogenase

LF:

Low frequency

rMSSD:

Root mean square of successive RR interval differences

RPE:

Perceived exertion scale

SD1:

Standard deviation perpendicular to the line of identity

SD2:

Standard deviation parallel to the line of identity

\(\dot{V}O_{2}\): :

Oxygen uptake

\(\dot{V}O_{2\max }\) :

Maximal oxygen uptake

\(v\dot{V}O_{2\max }\) :

Minimal exercise velocity at which maximal oxygen uptake was reached

References

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Funding

Malta ES and Lopes VHF were supported by São Paulo Research Foundation (FAPESP) fellowship (#2017/21724–8 and #2019/22726–0, respectively). Zagatto AM received grants from CNPq Process 307719/2016–2. Malta ES, Lopes VHF, and Zagatto AM were also supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brazil (CAPES) – Finance Code 001.

Author information

Authors and Affiliations

Authors

Contributions

The study was designed by ESM and AMZ. Malta ES and VHFL participated in data acquisition. ESM, VHFL, ME, and AMZ drafted the manuscript. All authors critically reviewed the manuscript, and approved the final manuscript as submitted.

Corresponding author

Correspondence to Alessandro Moura Zagatto.

Ethics declarations

Conflict of interest

Malta ES, Lopes VHF, Esco M, and Zagatto AM declare that they have no conflicts of interest relevant to the content of this study.

Ethics approval

All procedures were approved by Sao Paulo State University Research Ethics Board (protocol no. 82797718.8.0000.5398) and conducted according to the Declaration of Helsinki.

Additional information

Communicated by Massimo Pagani.

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Malta, E.S., Lopes, V.H.F., Esco, M.R. et al. Repeated cold-water immersion improves autonomic cardiac modulation following five sessions of high-intensity interval exercise. Eur J Appl Physiol 123, 1939–1948 (2023). https://doi.org/10.1007/s00421-023-05205-4

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  • DOI: https://doi.org/10.1007/s00421-023-05205-4

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