Chronic conventional resistance exercise reduces blood pressure in stage 1 hypertensive men

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CHRONIC CONVENTIONAL RESISTANCE EXERCISE REDUCES BLOOD PRESSURE IN STAGE 1 HYPERTENSIVE MEN
MILTON R. MORAES,1,2 REURY F.P. BACURAU,3 DULCE E. CASARINI,4 ZAIRA P. JARA,4 FERNANDA A. RONCHI,4 SANDRO S. ALMEIDA,1 ELISA M.S. HIGA,4 MARCOS A. PUDO,2 ˜ THIAGO S. ROSA,1 ANDERSON S. HARO,1 CARLOS C. BARROS,1 JOAO B. PESQUERO,1 1 1 ¨ MARTIN WURTELE, AND RONALDO C. ARAUJO
1

Departament of Biophysics,Universidade Federal University of Sa Paulo, Sa Paulo, Brazil; 2School of Physical Education, ˜o ˜o University of Mogi das Cruzes, Mogi das Cruzes, Brazil; 3School of Arts, Sciences and Humanities, University of Sa Paulo, ˜o Sa Paulo, Brazil; and 4Nephrology Division, Federal University of Sa˜o Paulo, Sa˜o Paulo, Brazil ˜o

ABSTRACT
Moraes, MR, Bacurau, RFP, Casarini, DE, Jara, ZP, Ronchi, FA,Almeida, SS, Higa, EMS, Pudo, MA, Rosa, TS, Haro, AS, Barros, ¨ CC, Pesquero, JB, Wurtele, M, and Araujo, RC. Chronic conventional resistance exercise reduces blood pressure in stage 1 hypertensive men. J Strength Cond Res 25(X): 000– 000, 2011—To investigate the antihypertensive effects of conventional resistance exercise (RE) on the blood pressure (BP) of hypertensive subjects, 15 middle-aged(46 6 3 years) hypertensive volunteers, deprived of antihypertensive medication (reaching 153 6 6/93 6 2 mm Hg systolic/diastolic BP after a 6week medication washout period) were submitted to a 12-week conventional RE training program (3 sets of 12 repetitions at 60% 1 repetition maximum, 3 times a week on nonconsecutive days). Blood pressure was measured in all phases of the study (washout,training, detraining). Additionally, the plasma levels of several vasodilators or vasoconstrictors that potentially could be involved with the effects of RE on BP were evaluated pre- and posttraining. Conventional RE significantly reduced systolic, diastolic, and mean BP, respectively, by an average of 16 (p , 0.001), 12 (p , 0.01), and 13 mm Hg (p , 0.01) to prehypertensive values. There were nosignificant changes of vasoactive factors from the kallikrein-kinin or renin-angiotensin systems. After the RE training program, the BP values remained stable during a 4-week detraining period. Taken together, this study shows for the first time that conventional moderateintensity RE alone is able to reduce the BP of stage 1 hypertensive subjects free of antihypertensive medication. Moreover,

the benefitsof BP reduction achieved with RE training remained unchanged for up to 4 weeks without exercise.

KEY WORDS strength training, hypertension, vasoactive factors,
detraining

INTRODUCTION

I

´ Address correspondence to Ronaldo C. Araujo, araujo.ronaldo@unifesp.br 0(0)/1–8 Journal of Strength and Conditioning Research Ó 2011 National Strength and Conditioning Association

t can beanticipated that hypertension will afflict up to a third of the world’s population by the year 2025 (13). Among the nonpharmacological approaches to treat this condition, physical exercise is possibly one of the most promising (22). Although aerobic exercise (AE) has been extensively studied concerning its hypotensive effect (23), the same is not true in relation to resistance exercise (RE) (10). Despiteits ‘‘adjuvant status,’’ RE is well suited for the prevention and treatment of numerous diseases like osteoporosis and sarcopenia (8,10), also contributing important benefits to aging hypertensive individuals that are not obtainable through AE (23,30). Two meta-analyses on RE reported only 3 studies with hypertensive individuals out of a total of 12 studies (10,17). Two of these studiesinvestigated the effect of circuit weight training (CWT) on the blood pressure (BP) of hypertensive adults (5,15). The third study investigated the effect of conventional RE on the BP of elderly hypertensive subjects (9). In addition, some parameters like the use of antihypertensive medication, the gender, time course of BP decreases during the study, age, degrees of hypertension of the subjects under...
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