| Journal: | Brazilian journal of physical therapy |
| Database: | PERIÓDICA |
| System number: | 000380171 |
| ISSN: | 1809-9246 |
| Authors: | Andrade, Marilia S1 Lira, Claudio A.B2 Vancini, Rodrigo L3 Nakamoto, Fernanda P1 Cohen, Moises4 Silva, Antonio C1 |
| Institutions: | 1Universidade Federal de Sao Paulo, Departamento de Fisiologia, Sao Paulo. Brasil 2Universidade Federal de Goias, Faculdade de Educacao Fisica, Goiania, Goias. Brasil 3Universidade Federal do Espirito Santo, Centro de Educacao Fisica e Desportos, Vitoria, Espirito Santo. Brasil 4Universidade Federal de Sao Paulo, Departamento de Ortopedia e Traumatologia, Sao Paulo. Brasil |
| Year: | 2014 |
| Season: | Mar-Abr |
| Volumen: | 18 |
| Number: | 2 |
| Pages: | 144-151 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | Objectives: To investigate whether the muscle strength decrease that follows anterior cruciate ligament (ACL) reconstruction would lead to different cardiorespiratory adjustments during dynamic exercise. Method: Eighteen active male subjects were submitted to isokinetic evaluation of knee flexor and extensor muscles four months after ACL surgery. Thigh circumference was also measured and an incremental unilateral cardiopulmonary exercise test was performed separately for both involved and uninvolved lower limbs in order to compare heart rate, oxygen consumption, minute ventilation, and ventilatory pattern (breath rate, tidal volume, inspiratory time, expiratory time, tidal volume/inspiratory time) at three different workloads (moderate, anaerobic threshold, and maximal). Results: There was a significant difference between isokinetic extensor peak torque measured in the involved (116.5±29.1 Nm) and uninvolved (220.8±40.4 Nm) limbs, p=0.000. Isokinetic flexor peak torque was also lower in the involved limb than in the uninvolved limb (107.8±15.4 and 132.5±26.3 Nm, p=0.004, respectively). Lower values were also found in involved thigh circumference as compared with uninvolved limb (46.9±4.3 and 48.5±3.9 cm, p=0.005, respectively). No differences were found between the lower limbs in any of the variables of the incremental cardiopulmonary tests at all exercise intensities. Conclusions: Our findings indicate that, four months after ACL surgery, there is a significant deficit in isokinetic strength in the involved limb, but these differences in muscle strength requirement do not produce differences in the cardiorespiratory adjustments to exercise. Based on the hypotheses from the literature which explain the differences in the physiological responses to exercise for different muscle masses, we can deduce that, after 4 months of a rehabilitation program after an ACL reconstruction, individuals probably do not present.. |
| Disciplines: | Medicina |
| Keyword: | Fisiología humana, Terapéutica y rehabilitación, Traumatología y ortopedia, Ligamento cruzado anterior, Reconstrucción, Fuerza muscular, Terapia física, Ejercicios isocinéticos, Captación de oxígeno, Respuesta ventilatoria |
| Keyword: | Medicine, Human physiology, Therapeutics and rehabilitation, Traumatology and orthopedics, Anterior cruciate ligament, Reconstruction, Muscular strength, Physical therapy, Isokinetic exercises, Oxygen uptake, Ventilatory response |
| Full text: | Texto completo (Ver PDF) |
