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Title: Is Low-Frequency Electrical Stimulation a Tool for Recovery after a Water Rescue? A Cross-Over Study with Lifeguards
Authors: Barcala-Furelos, Roberto
González-Represas, Alicia
Rey, Ezequiel
Martínez-Rodríguez, Alicia
Kalén, Anton
Marques, Olga 
Rama, Luís 
Keywords: transcutaneous electric nerve stimulation; task performance and analysis; tensiomyography; lactate; lifesaving
Issue Date: 12-Aug-2020
Publisher: MDPI
Serial title, monograph or event: International Journal of Environmental Research and Public Health
Volume: 17
Issue: 16
Abstract: This study aimed to evaluate the degree to which transcutaneous electrical stimulation (ES) enhanced recovery following a simulated water rescue. Twenty-six lifeguards participated in this study. The rescue consisted of swimming 100 m with fins and rescue-tube: 50 m swim approach and 50 m tow-in a simulated victim. Blood lactate clearance, rated perceived effort (RPE), and muscle contractile properties were evaluated at baseline, after the water rescue, and after ES or passive-recovery control condition (PR) protocol. Tensiomiography, RPE, and blood lactate basal levels indicated equivalence between both groups. There was no change in tensiomiography from pre to post-recovery and no difference between recovery protocols. Overall-RPE, legs-RPE and arms-RPE after ES (mean ± SD; 2.7 ± 1.53, 2.65 ± 1.66, and 2.30 ± 1.84, respectively) were moderately lower than after PR (3.57 ± 2.4, 3.71 ± 2.43, and 3.29 ± 1.79, respectively) (p = 0.016, p = 0.010, p = 0.028, respectively). There was a significantly lower blood lactate level after recovery in ES than in PR (mean ± SD; 4.77 ± 1.86 mmol·L-1 vs. 6.27 ± 3.69 mmol·L-1; p = 0.045). Low-frequency ES immediately after a water rescue is an effective recovery strategy to clear out blood lactate concentration.
ISSN: 1660-4601
DOI: 10.3390/ijerph17165854
Rights: openAccess
Appears in Collections:I&D CIDAF - Artigos em Revistas Internacionais
FCDEF - Artigos em Revistas Internacionais

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