A high-salt meal does not augment blood pressure responses during maximal exercise.
Appl Physiol Nutr Metab
; 45(2): 123-128, 2020 Feb.
Article
em En
| MEDLINE
| ID: mdl-31238011
ABSTRACT
Augmented blood pressure (BP) responses during exercise are predictive of future cardiovascular disease. High dietary sodium (Na+) increases BP responses during static exercise. It remains unclear if high dietary Na+ augments BP responses during dynamic exercise. The purpose of this study was to test the hypothesis that an acute high-Na+ meal would augment BP responses during dynamic exercise. Twenty adults (10 male/10 female; age, 26 ± 5 years; BP, 105 ± 10/57 ± 6 mm Hg) were given a high-Na+ meal (HSM; 1495 mg Na+) and a low-Na+ meal (LSM; 138 mg Na+) separated by at least 1 week, in random order. Serum Na+ and plasma osmolality were measured. Eighty minutes following the meal, participants completed a graded-maximal exercise protocol on a cycle ergometer. Heart rate, beat-by-beat BP, cardiac output, total peripheral resistance, and manual BP were measured at rest and during exercise. Both serum Na+ (HSM Δ1.6 ± 2.0 vs LSM Δ1.1 ± 1.8 mmol/L, P = 0.0002) and plasma osmolality (HSM Δ3.0 ± 4.5 vs LSM Δ2.0 ± 4.2 mOsm/(kg·H2O), P = 0.01) were higher following the HSM. However, the HSM did not augment BP during peak exercise (systolic BP HSM 170 ± 23 vs LSM 171 ± 21 mm Hg, P = 0.81). These findings suggest that an acute high-salt meal does not augment BP responses during dynamic exercise in adults. Novelty The high-salt meal increased serum sodium and plasma osmolality compared with the low-salt meal. The high-salt meal did not augment blood pressure responses during maximal dynamic exercise. This is important as augmented blood pressure responses during exercise put individuals at greater risk for development of cardiovascular disease.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pressão Sanguínea
/
Exercício Físico
/
Cloreto de Sódio na Dieta
/
Refeições
Tipo de estudo:
Clinical_trials
/
Prognostic_studies
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Appl Physiol Nutr Metab
Assunto da revista:
CIENCIAS DA NUTRICAO
/
FISIOLOGIA
/
MEDICINA ESPORTIVA
/
METABOLISMO
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Estados Unidos