Factors other than differences in test circumstances, or loss to follow-up have to be sought to explain the differences between cross-sectional and longitudinal results with respect to static muscle endurance. Younger workers who participated in sports for 3 h per week or more had the best muscular capacity, but older workers
who participated in sports between 0 and 3 h per week had better muscular capacity selleck compound than those who were inactive or participated in sports for 3 h per week or more. Open Access This article is distributed under the terms of the Creative Commons Attribution Noncommercial GM6001 License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. References Alaranta H, Hurri H, Heliovaara M, Soukka A, Harju R (1994) Non-dynamometric trunk performance tests: reliability and normative data. Scand J Rehabil Med 26:211–215PubMed Asmussen E, Heeboll-Nielsen K (1962) Isometric muscle strength in relation to age in men and women. Ergonomics 5:167–169. doi:10.1080/00140136208930570
CrossRef Bemben MG (1998) Age-related alterations in muscular endurance. Sports Med 25:259–269. doi:10.2165/00007256-199825040-00004 PubMedCrossRef Bemben MG, Massey BH, Bemben DA, Misner JE, Boileau RA (1996) Isometric intermittent endurance of four muscle groups in men aged 20–74 years. Med Sci Sports find more Exerc 28:145–154. doi:10.1097/00005768-199601000-00026 PubMedCrossRef Biering-Sørensen F (1984) Physical measurements as risk indicators for low-back
trouble over a one-year period. Spine 9:106–119. doi:10.1097/00007632-198403000-00002 PubMedCrossRef Borg G (1990) Psychophysical scaling with applications in physical work and the perception of exertion. Scand J Work Environ Health 16(Suppl 1):55–58PubMed Brach JS, Simonsick EM, Kritchevsky S, Yaffe K, Newman AB (2004) The association between physical function and lifestyle activity and exercise in the health, aging and body composition Sclareol study. J Am Geriatr Soc 52:502–509. doi:10.1111/j.1532-5415.2004.52154.x PubMedCrossRef Cohen J (2003) Applied multiple regression: correlation analysis for the behavioral sciences, 3rd edn. Erlbaum, London De Zwart BC, Frings-Dresen MH, Van Dijk FJ (1995) Physical workload and the aging worker: a review of the literature. Int Arch Occup Environ Health 68:1–12. doi:10.1007/BF01831627 PubMedCrossRef De Zwart BC, Broersen JP, Frings-Dresen MH, Van Dijk FJ (1997) Musculoskeletal complaints in The Netherlands in relation to age, gender and physically demanding work. Int Arch Occup Environ Health 70:352–360PubMedCrossRef Era P, Schroll M, Hagerup L, Schultz-Larsen JK (2001) Changes in bicycle ergometer test performance and survival in men and women from 50 to 60 and from 70 to 80 years of age: two longitudinal studies in the Glostrup (Denmark) population. Gerontology 47:136–144. doi:10.