Volume 5, Number 1 (Spring 2015-- 2015)                   PTJ 2015, 5(1): 19-24 | Back to browse issues page


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Ahi S, Nodehi-Moghadam A, Mosallanezad Z, Hoseinzadeh S. Difference in Hamstring-to-Quadriceps Ratio and Dynamic Stability between Limbs in Elderly People. PTJ. 2015; 5 (1) :19-24
URL: http://ptj.uswr.ac.ir/article-1-205-en.html

1- M.Sc student of physiotherapy Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
2- Associate Professor Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
3- Assistant Professor Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
4- Assistant Professor Department of Statistics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
Abstract:   (857 Views)

Purpose: previous studies have suggested that thigh muscle imbalance may be a risk factor for knee injury. The Present study aimed to compare Hamstring-to-Quadriceps (H:Q) Ratio and dynamic stability between the two lower limbs of elderly people.
Methods: This was a correlational study and by nonprobability sampling 19 healthy community doweling elderly (age=65.93±3.53 yrs.) participated in this study. Dynamic strength and power of knee extensor and flexor muscles and H:Q ratios of each lower limb were measured by isokinetic dynamometer. Dynamic stability was evaluated using the biodex balance system. Paired t test and Wilcoxon test were performed to compare power, strength, H:Q ratio, and balance index of 2 sides. Data analysis were conducted using SPSS software, version 19.
Results: Strength and power between two legs was significantly asymmetrical. There was no significant difference in H:Q strength ratios (P=0.057) between the two sides although this ratio was 14.42% greater in weaker leg. Antero-posterior stability index (APSI) was significantly different between two legs (P=0.03), however there is no significant difference in overall stability index (OSI) and medio-lateral stability index (MLSI).
Conclusion: The asymmetry between limbs or weakness of the quadriceps and/or hamstring muscle strength and the resultant change in H:Q ratio should be considered in rehabilitation of older adults.

Full-Text [PDF 506 kb]   (614 Downloads)    
Type of Study: Research | Subject: Special
Received: 2014/10/12 | Accepted: 2015/01/27 | Published: 2015/04/1

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