• Gabriel Costa E Silva, Roberto Simão, Rodrigo Rodrigues da Conceição, Pablo B Costa, Humberto Miranda, Rodolfo Rodrigues da Conceição, Roberto L Almeida, and Mônica Akemi Sato.
• Programa de Pos Graduacao em Ciencias da Saude, Faculdade de Medicina do ABC, Centro Universitario Saude ABC (Fundacao ABC), Santo Andre, SP, BR.
• Clinics (Sao Paulo). 2019 Jan 1; 74: e1066.

ObjectivesTo compare the effects of combinations of resistance training (RT) and static stretching (SS) on heart rate (HR), systolic pressure (SBP), diastolic pressure (DBP), rate pressure product (RPP), oxygen saturation (SpO2), rating of perceived effort (RPE), and heart rate variability (HRV) in men.MethodsTwelve normotensive healthy men participated in four protocols: a) SS+RT, b) RT+SS, c) RT, and d) SS. Variables were measured before, immediately after, and 15, 30, and 45 min after the sessions.ResultsThe combination of SS and RT increased (p<0.001) HR when compared to the effects of the noncombined protocols (from 2.38 to 11.02%), and this result indicated metabolic compensation. Regarding DBP, there were differences (p<0.001) between the RT and SS groups (53.93±8.59 vs. 67.00±7.01 mmHg). SS has been shown to be able to reduce (p<0.001) SpO2 (4.67%) due to the occlusion caused by a reduction in the caliber of the blood vessels during SS compared to during rest. The increase in RPP (6.88% between RT and SS+RT) along with the HR results indicated higher metabolic stress than that reflected by the RPE (combined protocols increased RPE from 21.63 to 43.25%). The HRV analysis confirmed these results, showing increases (p<0.01) in the LF index between the combined and noncombined protocols. Compared to the effect of RT, the combination of SS and RT promoted a vagal suppression root mean square of the successive differences (RMSSD) index (from 9.51 to 21.52%) between the RT and SS+RT groups (p<0.01) and between the RT and RT+SS groups (p<0.001).ConclusionStatic stretching increases cardiac overload and RPE, reducing oxygen supply, especially when performed in combination with RT.

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