Effect of seated leg press exercise on knee extension strength in elderly
Abstract Introduction: After age 50 to 70 years, 15% of muscles strength is lost per decade. Elderly people need to 90% of knee extensor muscles strength for daily activities such as getting up from a chair, while this value is only slightly more than half in young people. Due to the importance of...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | fas |
| Published: |
Vesnu Publications
2014-10-01
|
| Series: | مجله پژوهش در علوم توانبخشی |
| Online Access: | http://jrrs.mui.ac.ir/index.php/jrrs/article/view/1370 |
| _version_ | 1819028069428494336 |
|---|---|
| author | Karar Khoga Naamat Heydar Sadeghi Mansour Sahebozamani Somaye Nazari |
| author_facet | Karar Khoga Naamat Heydar Sadeghi Mansour Sahebozamani Somaye Nazari |
| author_sort | Karar Khoga Naamat |
| collection | DOAJ |
| description | Abstract
Introduction: After age 50 to 70 years, 15% of muscles strength is lost per decade. Elderly people need to 90% of knee extensor muscles strength for daily activities such as getting up from a chair, while this value is only slightly more than half in young people. Due to the importance of knee extensor muscles strength in elderly, the purpose of this study was effect of seated leg press exercise on knee extension strength in elderly.
Materials and Methods: twenty-four elderly men (age 61.41±6 years, height 75.9±6.2 kg and weight 173.31±5.2) were randomly divided in two matched groups. Resistance training group performed one set of 12 repetitions with 70% of one repetition maximum (1RM) in each session, twice a week for eight weeks. Control group were engaged in their daily activities in this period. Isokinetic strength of the knee extensors of both legs was determined at 60°/s with a dynamometer (Biodex system 3).
Results: The 8-week seated leg press exercise led to significant improvements in knee extension strength from pretest to posttest for both dominant and non-dominant leg in resistance training group (respectively P=0.002 and P=0.003). These changes were not significant in control group (respectively P=0.220 and P=0.168).
Conclusions: performing one set of 12 repetitions with 70% of 1RM in each session, twice a week for eight weeks, may led to significant improvement in knee extension strength in elderly people.
Key words: Seated leg press, Knee extension strength, Elderly |
| first_indexed | 2024-12-21T05:52:30Z |
| format | Article |
| id | doaj.art-ee87a6fc02ad42c58fb76c819b4a4523 |
| institution | Directory Open Access Journal |
| issn | 1735-7519 2008-2606 |
| language | fas |
| last_indexed | 2024-12-21T05:52:30Z |
| publishDate | 2014-10-01 |
| publisher | Vesnu Publications |
| record_format | Article |
| series | مجله پژوهش در علوم توانبخشی |
| spelling | doaj.art-ee87a6fc02ad42c58fb76c819b4a45232022-12-21T19:13:56ZfasVesnu Publicationsمجله پژوهش در علوم توانبخشی1735-75192008-26062014-10-0110453954810.22122/jrrs.v10i4.1370612Effect of seated leg press exercise on knee extension strength in elderlyKarar Khoga Naamat0Heydar Sadeghi1Mansour Sahebozamani2Somaye Nazari3PhD candidate for sport biomechanics & Kharazmi University, Tehran, IranProfessor, Department of Physical Education & Sport Sciences, Kharazmi University, Tehran, IranAssociate Professor, Department of Physical Education & Sport Science, Shahid Bahonar University, Kerman, IranDepartment of Physical Education & Sport Science, Shahid Beheshti, Tehran, IranAbstract Introduction: After age 50 to 70 years, 15% of muscles strength is lost per decade. Elderly people need to 90% of knee extensor muscles strength for daily activities such as getting up from a chair, while this value is only slightly more than half in young people. Due to the importance of knee extensor muscles strength in elderly, the purpose of this study was effect of seated leg press exercise on knee extension strength in elderly. Materials and Methods: twenty-four elderly men (age 61.41±6 years, height 75.9±6.2 kg and weight 173.31±5.2) were randomly divided in two matched groups. Resistance training group performed one set of 12 repetitions with 70% of one repetition maximum (1RM) in each session, twice a week for eight weeks. Control group were engaged in their daily activities in this period. Isokinetic strength of the knee extensors of both legs was determined at 60°/s with a dynamometer (Biodex system 3). Results: The 8-week seated leg press exercise led to significant improvements in knee extension strength from pretest to posttest for both dominant and non-dominant leg in resistance training group (respectively P=0.002 and P=0.003). These changes were not significant in control group (respectively P=0.220 and P=0.168). Conclusions: performing one set of 12 repetitions with 70% of 1RM in each session, twice a week for eight weeks, may led to significant improvement in knee extension strength in elderly people. Key words: Seated leg press, Knee extension strength, Elderlyhttp://jrrs.mui.ac.ir/index.php/jrrs/article/view/1370 |
| spellingShingle | Karar Khoga Naamat Heydar Sadeghi Mansour Sahebozamani Somaye Nazari Effect of seated leg press exercise on knee extension strength in elderly مجله پژوهش در علوم توانبخشی |
| title | Effect of seated leg press exercise on knee extension strength in elderly |
| title_full | Effect of seated leg press exercise on knee extension strength in elderly |
| title_fullStr | Effect of seated leg press exercise on knee extension strength in elderly |
| title_full_unstemmed | Effect of seated leg press exercise on knee extension strength in elderly |
| title_short | Effect of seated leg press exercise on knee extension strength in elderly |
| title_sort | effect of seated leg press exercise on knee extension strength in elderly |
| url | http://jrrs.mui.ac.ir/index.php/jrrs/article/view/1370 |
| work_keys_str_mv | AT kararkhoganaamat effectofseatedlegpressexerciseonkneeextensionstrengthinelderly AT heydarsadeghi effectofseatedlegpressexerciseonkneeextensionstrengthinelderly AT mansoursahebozamani effectofseatedlegpressexerciseonkneeextensionstrengthinelderly AT somayenazari effectofseatedlegpressexerciseonkneeextensionstrengthinelderly |