Kodama Fábio Yoshikazu, Camargo Regina Celi Trindade, Job Aldo Eloizo, Ozaki Guilherme Akio Tamura, Koike Tatiana Emy, Camargo Filho José Carlos Silva
Faculdade de Ciências e Tecnologia - FCT/UNESP - Presidente Prudente, SP, Brazil.
Acta Ortop Bras. 2012;20(4):218-22. doi: 10.1590/S1413-78522012000400005.
To describe the effects of immobilization, free remobilization and remobilization by physical exercise about mechanical properties of skeletal muscle of rats of two age groups.
56 Wistar rats divided into two groups according to age, an adult group (five months) and an older group (15 months). These groups were subdivided in: control, immobilized, free remobilized and remobilized by physical exercise. The pelvic limb of rats was immobilized for seven days. The exercise protocol consisted of five swimming sessions, once per day and 25 minutes per session. The gastrocnemius muscle was subjected to tensile tests, and evaluated the properties: load at the maximum limit, stretching at the maximum limit and stiffness.
The immobilization reduced the values of load at the maximum limit and the remobilization protocols were not sufficient to restore control levels in adult group and older rats. The stretching at the maximum limit differs only in the older group.
The immobilization reduces the muscle's ability to bear loads and exercise protocol tends to restore the default at control values in adult and older rats. The age factor only interfered in the stretching at the maximum limit, inducing a reduction of this property in the post-immobilization. Level of Evidence II, Investigating the Results of Treatment.
描述制动、自由活动恢复和体育锻炼恢复对两个年龄组大鼠骨骼肌力学性能的影响。
56只Wistar大鼠按年龄分为两组，成年组（5个月）和老年组（15个月）。这些组再细分为：对照组、制动组、自由活动恢复组和体育锻炼恢复组。将大鼠的后肢制动7天。运动方案包括5次游泳训练，每天1次，每次25分钟。对腓肠肌进行拉伸试验，并评估其性能：最大极限负荷、最大极限拉伸和刚度。
制动降低了最大极限负荷值，恢复方案不足以使成年组和老年大鼠恢复到对照水平。最大极限拉伸仅在老年组有所不同。
制动会降低肌肉承受负荷的能力，运动方案倾向于使成年和老年大鼠恢复到对照值的默认状态。年龄因素仅影响最大极限拉伸，导致制动后该性能降低。证据水平II，治疗结果研究。
