Electromyographic response to exercise in cardiac transplant patients: a new method for anaerobic threshold determination?

Chest
A LucíaJ L Chicharro

Abstract

The purpose of this study was to investigate the possible use of integrated surface electromyography (iEMG) in cardiac transplant patients (CTPs) as a new noninvasive determinant of the metabolic response to exercise by studying the relationship between the iEMG threshold (iEMGT) and other more conventional methods for anaerobic threshold (AT) determination, such as the lactate threshold (LT) and the ventilatory threshold (VT). Thirteen patients (age: 57+/-7 years, mean+/-SD; height: 163+/-7 cm; body mass: 70.5+/-8.6 kg; posttransplant time: 87+/-49 weeks) were selected as subjects. Each of them performed a ramp protocol on a cycle ergometer (starting at 0 W, the workload was increased in 10 W/min). During the tests, gas exchange data, blood lactate levels, and iEMG of the vastus lateralis were collected to determine VT, LT, and iEMGT, respectively. The results evidenced no significant difference between mean values of VT, LT, or iEMGT, when expressed either as oxygen uptake (11.1+/-2.4, 11.7+/-2.3, and 11.0+/-2.8 mL/kg/min, respectively) or as percent maximum oxygen uptake (61.6+/-7.5, 62.2+/-7.7, and 59.6+/-8.2%, respectively). In conclusion, our findings suggest that iEMG might be used as a complementary, noninvasive method ...Continue Reading

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Citations

Jul 11, 2007·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·José L Maté-MuñozAlejandro Lucia
Feb 12, 2009·Clinical Physiology and Functional Imaging·Moh H Malek, Jared W Coburn
Dec 22, 1999·The Japanese Journal of Physiology·J L ChicharroA Lucía
Mar 16, 2012·Physiological Measurement·Olli TikkanenTaija Finni
Jun 27, 2021·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Murillo FrazãoMaria do Socorro Brasileiro-Santos

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