Effect of differences in post-exercise lactate accumulation in athletes’ haemodynamics

Abstract

To verify the relationship between exercise intensity and post-exercise haemodynamics, we studied haemodynamic and lactate responses during 10 min following 3 bicycle tests. Two tests were performed for 3 min at 70% and 130% of the workload corresponding to anaerobic threshold (70% W(at) and 130% W(at) tests), and 1 was performed until exhaustion at 150% of the maximum workload achieved during a previous incremental test (150% W(max) test). During the recovery period after the 150% W(max) test we observed the highest increases in blood lactate with respect to the baseline: at the 9th minute of recovery lactate concentration increased by +9.3 +/- 2.7, +6.4 +/- 3.1, and +1.1 +/- 0.9 mmol x L(-1) in the 150% W(max) (p > 0.05 with respect to the other protocol sessions), 130% W(at), and 70% W(at) tests, respectively. We also observed greater reductions in cardiac pre-load and systemic vascular resistance in the 150% W(max) test than in the 130% W(at) and 70% W(at) tests. However, the cardiac output response successfully faced the increased vasodilatation occurring during 150% W(max) test so that changes in mean blood pressure were similar in the 3 test conditions. This study shows that exercises that yielded different lactate concentrations also led to greater vasodilatation. Nevertheless, mechanisms controlling the cardiovascular apparatus successfully prevented a drop in blood pressure in spite of the cardiovascular stress.

Intra‐arterial blood pressure traits during and after heavy resistance exercise in healthy males

“…Our results are also similar to, which demonstrated that a larger exercise volume may cause a prolonged PEH. Some have hypothesized that PEH is caused by a combination of change in stroke volume and HR, while others have suggested a relationship of cBLa with systemic vascular resistance . However, we observed no difference in HR post‐exercise compared with pre‐exercise, and no difference in PEH despite a cBLa 2.3 times higher in 5RES compared with 3RES.…”

Estudo comparativo de respostas cardiovasculares para dois intervalos de recuperação entre exercícios resistidos em circuito em mulheres normotensas

“…A greater accumulation of metabolites in the protocol with lower RI (30s) that had been demonstrated by Ratamess et al 18 and Crisafulli et al 28 could explain the longer post-exercise decrease in SBP and DBP that was found in the present study.…”

Effects of acute vasodilation on the hemodynamic response to muscle metaboreflex

“…However, as previously stated, we could not directly measure cardiac preload, since impedance cardiography cannot assess end-diastolic volume; this hypothesis remains speculative. The fact that venous and arteriolar dilation took place after ISDN is testified by Z 0 , which is an inverse index of thoracic fluid volume, that is, reductions in its values are associated with increases in central blood volume, whereas increases in Z 0 occur when central blood volume is reduced, such as during leg venous pooling (6,10,18). The reduction in this parameter indicated that an increase in thoracic blood volume was present after ISDN, a phenomenon coherent with the ISDN effects, i.e., artery and venous capacity vessel dilation.…”

“…Briefly, NCCOM 3-derived analog traces of electrocardiogram, thorax impedance (Z0), and Z0 first derivative were stored by using a digital chart recorder (PowerLab 8sp; ADInstruments, Castle Hill, Australia). Z0 is an inverse index of thoracic fluid volume, since reductions in its values are associated with increases in central blood volume while increases in Z0 occur when central blood volume is reduced, such as during leg venous pooling (6,10,18). Hence, changes in Z0 were used as an indirect measure of changes in central blood volume.…”