title: Older adults present better back endurance than young adults during a dynamic trunk extension exercise.
abstract: OBJECTIVE
  Poor back endurance is a predictor of low back pain. Few studies have investigated back muscle fatigue in older people. The purpose of this study was to compare the back muscle fatigue by endurance time and perceived effort between young and older adults during dynamic exercise.
  
  
  METHODS
  Sixteen older and 16 young adults, all healthy, participated in this study. The subjects performed a fatiguing trunk extension-flexion exercise on a Roman chair until exhaustion. Endurance time and perceived muscle fatigue (Borg CR-10 scale) were used as fatigue criteria.
  
  
  RESULTS
  The older adults were significantly (T<formula>_{(30)}</formula> = -2,073; p = 0.039) more resistant to back muscle fatigue (time in mean 133 ± 52 s) than the young adults (mean 97 ± 27 s). In general, both groups had the same perception of high-level fatigue during the exercise bout (T<formula>_{(29)}</formula> = 1.73; p=0.092).
  
  
  CONCLUSIONS
  The older adults presented better back endurance than young adults during a dynamic trunk extension exercise. These results have implications for back endurance in the primary prevention of low back pain in both young and older adults.
authors: Centre for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance, Universidade Norte do Paraná, Londrina-PR, Brazil Masters Program in Rehabilitation Sciences UEL/UNOPAR, Londrina-PR, Brazil.
authors: Rodolfo B
authors: RB
authors: Parreira
authors: Centre for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance, Universidade Norte do Paraná, Londrina-PR, Brazil Masters Program in Rehabilitation Sciences UEL/UNOPAR, Londrina-PR, Brazil.
authors: Márcio R
authors: MR
authors: de Oliveira
authors: Centre for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance, Universidade Norte do Paraná, Londrina-PR, Brazil Masters Program in Physical Therapy, Universidade Cidade de São Paulo, São Paulo, Brazil.
authors: César F
authors: CF
authors: Amorim
authors: Centre for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance, Universidade Norte do Paraná, Londrina-PR, Brazil Masters Professional Program in Physical Exercise and Health Promotion, Londrina-PR, Brazil Physical Education and Sport Department, Universidade Estadual de Londrina, Londrina, Brazil.
authors: Denilson C
authors: DC
authors: Teixeira And
authors: Centre for Health Science Research, Laboratory of Functional Evaluation and Human Motor Performance, Universidade Norte do Paraná, Londrina-PR, Brazil Masters Program in Rehabilitation Sciences UEL/UNOPAR, Londrina-PR, Brazil Masters Professional Program in Physical Exercise and Health Promotion, Londrina-PR, Brazil.
authors: Rubens A
authors: RA
authors: da Silva
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging / Q000502:physiology*; D001415:Back / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D017116:Low Back Pain / Q000175:diagnosis / Q000503:physiopathology* / Q000534:rehabilitation; D008297:Male; D008875:Middle Aged; D018763:Muscle Fatigue / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D011237:Predictive Value of Tests; D060726:Torso / Q000502:physiology; D055815:Young Adult
keywords: Exercise; aging; back muscles; endurance; low back pain; rehabilitation