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Abstract
Postexercise hypotension plays an important role in the non-pharmacological treat-ment of hypertension and is characterized by a decrease in blood pressure after a single exercise bout in relation to pre-exercise levels. This study investigated the effects of exercise intensity and creatine monohydrate supplementation on postexercise hypotension, as well as the possible role of blood lactate in this response. Ten normotensive subjects underwent resistance exercise sessions before (BC) and after (AC) creatine supplementation: 1) muscle endurance (ME) consisting of 30 repetitions at 30% of one-repetition maximum; 2) hypertrophy (HP) consisting of 8 repetitions at 75% of one-repetition maximum. Blood pressure was measured before and after the exercise bout. Blood lactate was measured after the exercise bout. The HP and ME sessions promoted a decrease in systolic blood pressure (∆ -19 ± 1.0 mmHg; ∆ -15 ± 0.9 mmHg, respectively, P< 0.05), which was attenuated after creatine supplementation (∆ -7.1 ± 1.0 mmHg; ∆ -11 ± 1.0 mmHg, respectively, P<0.05). Peak blood lactate was attenuated after creatine supplementation in the HP session (BC: 19 ± 0.4 mM; AC: 15 ± 0.4 mM, P< 0.05) and remained unchanged after creatine supplementation in the ME session (BC: 16 ± 0.8 mM; AC: 14 ± 0.4 mM, P> 0.05). In conclusion, resistance exercise intensity did not influence postexercise hypotension. Creatine supplementation attenuated the decrease in blood pressure after resistance exercise. The results suggest the involvement of blood lactate in post-resistance exercise hypotension.
Highlights
Attention has been focused on the cardiovascular benefits of physical training, and on the effects of one acute exercise session
A decrease in Systolic blood pressure (SBP) was observed after the HP BC session throughout post-exercise bout (P< 0.05), which was abolished after creatine supplementation
The present results demonstrated an important decrease in resting blood pressure (BP) after acute resistance exercise
Summary
Attention has been focused on the cardiovascular benefits of physical training, and on the effects of one acute exercise session. After an acute exercise bout, blood pressure (BP) levels are reduced for minutes or hours in relation to pre-exercise levels[1,2]. This phenomenon is called postexercise hypotension (PEH) and has been widely investigated because of its importance for the treatment and prevention of arterial hypertension[3,4]. Hussain et al.[6] investigated the effects of circulating metabolites such as blood lactate on alterations in femoral artery blood flow and vascular tone during recovery from high-intensity exercise (Wingate test). The authors demonstrated that blood lactate levels remained elevated during the period of persistent vasodilatation after the exercise bout
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