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"Sport Medicine Journal" No.19 - 2009
ARTICLE – abstract

Static back extensor muscles’ endurance in young, middle-aged and older
Nigerian adults

Olusola Ayanniyi1, Chidozie E. Mbada2
1Physiotherapy department, College of medicine, University of Ibadan, Nigeria.
2Department of Medical Rehabilitation, College of Health Sciences, Obafemi Awolowo University, Ile-Ife,


Background: The potential influence of age on endurance test results of the back extensors remains debated. There is also a dearth of studies on back muscle endurance testing from Sub-Sahara Africa. This study examined the differences in static endurance capacity of young, middle-aged and older adult Nigerians.
Methods: Back extensors endurance was assessed using the Sørensen test. Height and weight were measured using standard procedures. Percentage body fat was estimated using a bioelectrical impedance analysis machine. Body mass index and lean body mass and body fat mass were calculated.
Results: Endurance time was inversely correlated with age for all the participants (r = -0.562; p = 0.000) without gender bias. Significant difference (F = 94.556; p = 0.000) was found in the endurance time among the young, middle-aged and older adults categories. The results suggested that the significant age and anthropometric difference between the different age classifications could contribute to the endurance differences.
Conclusion: Compared to younger adults the older individuals exhibited decreased muscular endurance without gender bias. Middle-aged men had significant higher static back endurance than their women counterparts. We conclude that age is a major factor affecting an individual’s physical performance capacity of the back muscles.
Key words:

back extensor muscles, Sørensen test, static endurance, nigerian adults

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