Discontinuous sets of knee extensions induce higher cardiovascular responses in comparison to continuous ones

Marcos Doederlein Polito; Roberto Simão; Vitor Agnew Lira; Antônio Cláudio Lucas da Nóbrega; Paulo de Tarso Veras Farinatti

doi:10.1590/S0066-782X2008000600001

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Discontinuous sets of knee extensions induce higher cardiovascular responses in comparison to continuous ones

Journal article

Open access

Discontinuous sets of knee extensions induce higher cardiovascular responses in comparison to continuous ones

Marcos Doederlein Polito, Roberto Simão, Vitor Agnew Lira, Antônio Cláudio Lucas da Nóbrega and Paulo de Tarso Veras Farinatti

Arquivos brasileiros de cardiologia, Vol.90(6), pp.350-387

06/2008

DOI: 10.1590/S0066-782X2008000600001

PMID: 18592086

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Abstract

The strength training can promote significant cardiovascular responses during its performance and it is interesting to devise strategies to reduce them, without compromising the strength production. To compare the acute cardiovascular responses of systolic arterial pressure (SAP), diastolic arterial pressure (DAP), heart rate (HR) and double product (DP) during the unilateral knee extension (four series of 8 maximum repetitions) performed continuously or discontinuously. Both protocols involved a 2-minute interval between the series and the discontinuous protocol had an extra interval of 2 seconds between the 4th and the 5th repetitions. Eight healthy men trained in muscular strength (aged 26+/- 6 years) participated in the data collection and were randomly divided in two non-consecutive days. The cardiovascular responses were measured by photoplethysmography (Finapres, Ohmeda, Louisville, CO, USA) at rest, at the end of each series and 2 minutes after the performance of each protocol. The discontinuous series showed significantly higher values when compared to the protocol of the continuous series for: SAP (mmHg) at the 2nd (173.1+/- 5.4 vs 152.0+/- 4.0; p=0.001), 3rd (188.9+/- 8.6 vs 162.4+/- 6.0; p=0.000) and 4th series (193.1+/- 8.1 vs 161.6+/- 5.9; p=0.000); DAP (mmHg) at the 3rd (103.8+/- 4.1 vs 86.1+/- 3.3; p=0.000) and 4th series (104.1+/- 2.7 vs 83.4+/- 3.3; p=0.000); DP (mmHg.bpm) at the 2nd (17,907.5+/- 1,350.7 vs 14,541.9+/- 1,848.0; p=0.03), 3rd (19,687.3+/- 1,444.3 vs 15,612.1+/- 1,180.3; p=0.008) and 4th series (21,271.0+/- 1,794.2 vs 15,992.0+/- 1,093.4; p=0.001). The discontinuous protocol promoted higher increase in pressure responses when compared to the continuous one. However, due to the characteristics of the study design, further studies are necessary to support these findings.

Pilot Projects

Knee Joint

Humans

Heart Rate - physiology

Adult

Male

Photoplethysmography

Blood Pressure - physiology

Exercise - physiology

Muscle Strength - physiology

Details

Title: Subtitle: Discontinuous sets of knee extensions induce higher cardiovascular responses in comparison to continuous ones
Creators: Marcos Doederlein Polito - Universidade Estadual de Londrina, Paraná, PR, Brazil. marcospolito@uel.br
Roberto Simão
Vitor Agnew Lira
Antônio Cláudio Lucas da Nóbrega
Paulo de Tarso Veras Farinatti
Resource Type: Journal article
Publication Details: Arquivos brasileiros de cardiologia, Vol.90(6), pp.350-387
DOI: 10.1590/S0066-782X2008000600001
PMID: 18592086
NLM abbreviation: Arq Bras Cardiol
ISSN: 0066-782X
eISSN: 1678-4170
Publisher: Brazil
Language: English
Date published: 06/2008
Academic Unit: Health, Sport, and Human Physiology
Record Identifier: 9984002300902771

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