Lactate and Heart Rate Variability Threshold during Resistance Exercise in the Young and Elderly

被引：21

作者：

Simoes, R. P. ^{[1
]}

Castello-Simoes, V. ^{[1
]}

Mendes, R. G. ^{[1
]}

Archiza, B. ^{[1
]}

Santos, D. A. ^{[1
]}

Machado, H. G. ^{[1
]}

Bonjorno, J. C., Jr. ^{[2
]}

Oliveira, C. R. ^{[3
]}

Reis, M. S. ^{[4
]}

Catai, A. M. ^{[1
]}

Arena, R. ^{[5
,6
,7
]}

Borghi-Silva, A. ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Cardiopulm Physiotherapy Lab, Dept Physiotherapy, BR-13560 Sao Carlos, Brazil

[2] Univ Sao Paulo, BR-13560 Sao Carlos, Brazil

[3] Univ Fed Sao Carlos, Dept Med, BR-13560 Sao Carlos, Brazil

[4] Univ Fed Rio de Janeiro, Fac Med, Dept Internal Med, Rio De Janeiro, Brazil

[5] Univ New Mexico, Dept Orthopaed, Div Phys Therapy, Albuquerque, NM 87131 USA

[6] Univ New Mexico, Dept Internal Med, Div Cardiol, Albuquerque, NM 87131 USA

[7] Univ New Mexico, Latin Amer & Iberian Inst, Albuquerque, NM 87131 USA

来源：

INTERNATIONAL JOURNAL OF SPORTS MEDICINE | 2013年 / 34卷 / 11期

基金：

巴西圣保罗研究基金会;

关键词：

aging; exercise; autonomic cardiac control; blood lactate; ANAEROBIC THRESHOLD; AUTONOMIC CONTROL; CIRCULATION; INTENSITY; IDENTIFY; AGE;

D O I：

10.1055/s-0033-1337946

中图分类号：

G8 [体育];

学科分类号：

04 ; 0403 ;

摘要：

This purpose of this study was to: 1) determine the intensity corresponding to anaerobic threshold (AT) during a discontinuous resistance exercise protocol in healthy young and elderly subjects by analyzing heart rate variability (HRV) and blood lactate (BL) and 2) investigate the effect of aging on these variables. A total of 28 individuals, 14 young and 14 elderly healthy men underwent one-repetition maximum (1RM) testing to determine maximum load on the leg press. Discontinuous resistance exercise testing was initiated at 10% of the 1RM with subsequent increases of 10%. The load corresponding to AT was approximately 30% 1RM in both groups. The determination of AT by HRV was associated with BL responses (p<0.01). While HRV indexes decreased with increasing of loads in both groups, the elderly had lower values at loads below AT (p<0.05). Additionally, BL increased sharply after the load corresponding to AT in both groups, although elderly subjects showed the lowest values (p<0.05). In conclusion, HRV is an effective tool for determining AT, which was approximately 30% 1RM under the testing procedures included in the present study. Furthermore, there was a marked change in autonomic function, with gradual vagal withdrawal followed by sympathetic activation. These responses were lower in elderly subjects.

引用

页码：991 / 996

页数：6