Validity of isokinetic trunk measurements with respect to healthy adults, athletes and low back pain patients

Mueller, Steffen; Stoll, Josefine; Mueller, Juergen; Mayer, Frank

doi:10.3233/ies-2012-00482

Cited by 41 publications

(60 citation statements)

References 70 publications

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“…This can be seen, for example, in wrestlers (0.47), judokas (0.50) (23), and racecar drivers (0.64 (5)). In the context of reduced extensor strength in adults with low back pain, the strength ratio observed in adolescent athletes must be discussed differentially (16,23,34,43).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, Zazulak et al (44) showed an association between reduced core stability, including reduced muscular trunk strength, and a higher injury risk at the lower extremities in young athletes. Differences in trunk strength capacity, which are dependent on gender, age, and sports, have been identified in adults and in adult athletes (12,13,16,17,23,34,41,43). To the authors' knowledge, no study has reported on age-and gender-specific aspects in trunk strength capacity of adolescent athletes.…”

Section: Introductionmentioning

confidence: 96%

“…As reported in numerous studies, different types of sports reveal specific demands on strength capacity (5,20,23,30,34). Nevertheless, Kibler et al (25) described the role and importance of core stability for all types of sports, regardless of running, throwing, or jumping tasks.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, obvious differences in flexor and extensor strength between adult athletes and nonactive controls have been shown (30,34). In this respect, the ratio of absolute flexor to extensor strength is widely used to evaluate trunk strength capacity (30,33,34,36).…”

Section: Introductionmentioning

confidence: 99%

“…In this respect, the ratio of absolute flexor to extensor strength is widely used to evaluate trunk strength capacity (30,33,34,36). Ratios in healthy untrained adults usually range between 0.7 and 0.9 (5,12,30,34). In athletes, the ratio shifts toward 0.5-0.7, which corresponds to an increased extensor strength (5,30,33).…”

Section: Introductionmentioning

confidence: 99%

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Trunk Extensor and Flexor Strength Capacity in Healthy Young Elite Athletes Aged 11–15 Years

Mueller

Stoll

et al. 2014

Journal of Strength and Conditioning Research

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Differences in trunk strength capacity because of gender and sports are well documented in adults. In contrast, data concerning young athletes are sparse. The purpose of this study was to assess the maximum trunk strength of adolescent athletes and to investigate differences between genders and age groups. A total of 520 young athletes were recruited. Finally, 377 (n = 233/144 M/F; 13 ± 1 years; 1.62 ± 0.11 m height; 51 ± 12 kg mass; training: 4.5 ± 2.6 years; training sessions/week: 4.3 ± 3.0; various sports) young athletes were included in the final data analysis. Furthermore, 5 age groups were differentiated (age groups: 11, 12, 13, 14, and 15 years; n = 90, 150, 42, 43, and 52, respectively). Maximum strength of trunk flexors (Flex) and extensors (Ext) was assessed in all subjects during isokinetic concentric measurements (60°·s(-1); 5 repetitions; range of motion: 55°). Maximum strength was characterized by absolute peak torque (Flexabs, Extabs; N·m), peak torque normalized to body weight (Flexnorm, Extnorm; N·m·kg(-1) BW), and Flexabs/Extabs ratio (RKquot). Descriptive data analysis (mean ± SD) was completed, followed by analysis of variance (α = 0.05; post hoc test [Tukey-Kramer]). Mean maximum strength for all athletes was 97 ± 34 N·m in Flexabs and 140 ± 50 N·m in Extabs (Flexnorm = 1.9 ± 0.3 N·m·kg(-1) BW, Extnorm = 2.8 ± 0.6 N·m·kg(-1) BW). Males showed statistically significant higher absolute and normalized values compared with females (p < 0.001). Flexabs and Extabs rose with increasing age almost 2-fold for males and females (Flexabs, Extabs: p < 0.001). Flexnorm and Extnorm increased with age for males (p < 0.001), however, not for females (Flexnorm: p = 0.26; Extnorm: p = 0.20). RKquot (mean ± SD: 0.71 ± 0.16) did not reveal any differences regarding age (p = 0.87) or gender (p = 0.43). In adolescent athletes, maximum trunk strength must be discussed in a gender- and age-specific context. The Flexabs/Extabs ratio revealed extensor dominance, which seems to be independent of age and gender. The values assessed may serve as a basis to evaluate and discuss trunk strength in athletes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Trunk Extensor and Flexor Strength Capacity in Healthy Young Elite Athletes Aged 11–15 Years

Mueller

Stoll

et al. 2014

Journal of Strength and Conditioning Research

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Perturbation‐based exercise for prevention of low‐back pain in adolescent athletes

Arampatzis

Laube

Schroll

et al. 2020

Transl. Sports. Med.

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Low-back pain is a worldwide-recognized problem with dramatic consequences for the quality of life of the affected people. 1,2 Epidemiological studies evidenced that all age groups, from teenagers to young and old adults, are affected by low-back pain. 2,3 In 85%-95% of the low-back patients, the diagnosis of a recognizable, specific pathology based on infection, structural deformity, or inflammatory disorder is lacking. 4 For this reason, all these patients are diagnosed with "non-specific" low-back pain. The absence of a clear and recognizable pathology results in a large variation of intervention outcomes. 5,6 Systematic reviews show that effect sizes of most treatments for non-specific low-back pain are

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Sportmedizinische Grundlagen: Die Bedeutung der Trainingswissenschaft für die sportliche Leistungsoptimierung und den Gesundheitserhalt

Prieske¹,

Granacher²

2019

Bewegung, Training, Leistung Und Gesundheit

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Validity of isokinetic trunk measurements with respect to healthy adults, athletes and low back pain patients

Cited by 41 publications

References 70 publications

Trunk Extensor and Flexor Strength Capacity in Healthy Young Elite Athletes Aged 11–15 Years

Trunk Extensor and Flexor Strength Capacity in Healthy Young Elite Athletes Aged 11–15 Years

Perturbation‐based exercise for prevention of low‐back pain in adolescent athletes

Sportmedizinische Grundlagen: Die Bedeutung der Trainingswissenschaft für die sportliche Leistungsoptimierung und den Gesundheitserhalt

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