| Title | Effects of aerobic exercise training on variability and heart rate kinetic during submaximal exercise after gastric bypass surgery--a randomized controlled trial. | ||
| Author | Castello-Simoes, Viviane; Polaquini Simoes, Rodrigo; Beltrame, Thomas; Bassi, Daniela; Maria Catai, Aparecida; Arena, Ross; Azambuja, Noe Carvalho Jr; do Nascimento Ortega, Joao; Borghi-Silva, Audrey | ||
| Journal | Disabil Rehabil | Publication Year/Month | 2013-Feb |
| PMID | 22725971 | PMCID | -N/A- |
| Affiliation | 1.Cardiopulmonary Physiotherapy Laboratory, Nucleus of Research in Physical Exercise, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil. vivica_castello@yahoo.com.br. | ||
BACKGROUND: This study aimed to determine whether morbidly obese women have an alteration of heart rate (HR) kinetics and HR variability (HRV) during the 6-min walk test (6MWT) and if an aerobic exercise training can modify these indexes after gastric bypass surgery (GBS). DESIGN AND METHODS: Nineteen morbidly obese women were randomized to a trained (TG) or control group and 12 women of eutrophic group (EG) were also evaluated. The obese women were tested on two occasions: 1 week before and 4 months after GBS through record of HR and R-R intervals during 6MWT for analysis HR kinetics. The TG underwent an aerobic exercise training program on a treadmill (1-h session, totaling 36 sessions over 12-week). RESULTS: Both obese groups demonstrated a significant reduction of rMSSD and slower HR kinetics during the 6MWT when compared to the EG. In addition, only the TG demonstrated a significant improvement in HRV indexes, walking distance, faster time constant and mean response time of HR during 6MWT after training (p < 0.05). CONCLUSION: Morbidly obese women have slower HR kinetics and altered cardiac modulation during submaximal exercise. However, aerobic exercise training can produce beneficial adaptations in HRV and faster HR kinetics following GBS.