In:
American Journal of Physical Medicine & Rehabilitation, Ovid Technologies (Wolters Kluwer Health), Vol. 98, No. 11 ( 2019-11), p. 998-1004
Abstract:
Regaining muscle strength is essential for successful outcome after anterior cruciate ligament injury, why progression of exercise intensity in anterior cruciate ligament injury rehabilitation is important. Thus, this study evaluated hamstring and quadriceps muscle activity progression during bodyweight exercises used in a validated anterior cruciate ligament injury rehabilitation program. Design The study design involved single-occasion repeated measures in a randomized manner. Twenty healthy athletes (nine females) performed nine bodyweight exercises (three exercises per rehabilitation phase). Surface electromyography signals were recorded for hamstring (semitendinosus, biceps femoris) and quadriceps (vastus medialis, vastus lateralis) muscles and normalized to isometric peak electromyography. Results Hamstring muscle activity did not increase from one rehabilitation phase to the next, ranging between 8% and 45% normalized electromyography for semitendinosus and 11% and 54% normalized electromyography for biceps femoris. Only one exercise (Cook hip lift) exhibited hamstring muscle activities more than 60% normalized electromyography. By contrast, quadriceps muscle activity increased, and late-phase exercises displayed high normalized electromyography (vastus lateralis 〉 60% and vastus medialis 〉 90% normalized electromyography). Conclusions The examined bodyweight exercises did not progress for hamstring muscle activity but successfully progressed for quadriceps muscles activity. This study highlights the need for consensus on exercise selection when targeting the hamstring muscles in the rehabilitation after anterior cruciate ligament injury.
Type of Medium:
Online Resource
ISSN:
1537-7385
,
0894-9115
DOI:
10.1097/PHM.0000000000001232
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2019
detail.hit.zdb_id:
2272463-1
detail.hit.zdb_id:
2049617-5
SSG:
31
