| Journal: | Brazilian journal of physical therapy |
| Database: | PERIÓDICA |
| System number: | 000377244 |
| ISSN: | 1809-9246 |
| Authors: | Machado-Vidotti, Heloisa G1 Mendes, Renata G2 Simoes, Rodrigo P2 Castello-Simoes, Viviane2 Catai, Aparecida M2 Borghi-Silva, Audrey1 |
| Institutions: | 1Universidade de Sao Paulo, Faculdade de Engenharia, Sao Carlos, Sao Paulo. Brasil 2Universidade Federal de Sao Carlos, Centro de Pesquisa em Exercicio, Sao Carlos, Sao Paulo. Brasil |
| Year: | 2014 |
| Season: | Ene-Feb |
| Volumen: | 18 |
| Number: | 1 |
| Pages: | 9-18 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | Objective: To investigate the cardiac autonomic responses during upper versus lower limb discontinuous resistance exercise (RE) at different loads in healthy older men. Method: Ten volunteers (65±1.2 years) underwent the one-repetition maximum (1RM) test to determine the maximum load for the bench press and the leg press. Discontinuous RE was initiated at a load of 10%1RM with subsequent increases of 10% until 30%1RM, followed by increases of 5%1RM until exhaustion. Heart rate (HR) and R-R interval were recorded at rest and for 4 minutes at each load applied. Heart rate variability (HRV) was analyzed in 5-min segments at rest and at each load in the most stable 2-min signal. Results: Parasympathetic indices decreased significantly in both exercises from 30%1RM compared to rest (rMSSD: 20±2 to 11±3 and 29±5 to 12±2 ms; SD1: 15±2 to 8±1 and 23±4 to 7±1 ms, for upper and lower limb exercise respectively) and HR increased (69±4 to 90±4 bpm for upper and 66±2 to 89±1 bpm for lower). RMSM increased for upper limb exercise, but decreased for lower limb exercise (28±3 to 45±9 and 34±5 to 14±3 ms, respectively). In the frequency domain, the sympathetic (LF) and sympathovagal balance (LF/HF) indices were higher and the parasympathetic index (HF) was lower for upper limb exercise than for lower limb exercise from 35% of 1RM. Conclusions: Cardiac autonomic change occurred from 30% of 1RM regardless of RE limb. However, there was more pronounced sympathetic increase and vagal decrease for upper limb exercise than for lower limb exercise. These results provide a basis for more effective prescription of RE to promote health in this population |
| Disciplines: | Medicina |
| Keyword: | Geriatría, Sistema cardiovascular, Terapéutica y rehabilitación, Terapia física, Sistema nervioso autónomo, Ejercicios de resistencia, Ancianos, Miembros superiores, Miembros inferiores |
| Keyword: | Medicine, Cardiovascular system, Geriatrics, Therapeutics and rehabilitation, Physical therapy, Autonomic nervous system, Aged, Resistance exercises, Lower limbs, Upper limbs |
| Full text: | Texto completo (Ver PDF) |
