Summary
The effects of musculoskeletal work load and muscle strength on strain at work were analysed among 60 women and 69 men (mean age 52±3.4) in municipal jobs in Finland. The musculoskeletal work load was determined by analysing the jobs by a job description method. The maximal isometric hand grip strength was assessed with a manometer, trunk flexion and trunk extension strength with a dynamometer, and dynamic trunk flexion endurance strength with a sit-up test. Heart rate was registered continuously and ratings of perceived exertion were determined 4 times during the work shift. The results revealed that high musculoskeletal work load was systematically and significantly related to high strain at work in both sexes. A high mean heart rate related to an individual's range in women was an interaction effect of high work load and low hand grip strength or low trunk flexion strength. Among men, both high mean and maximal heart rates in relation to the heart rate range was due to the interaction effects of high work load and low trunk extension strength. The interaction of work load and strength was not systematically related to the ratings of perceived exertion during work. It was concluded that the musculoskeletal work load exerted the main effects on the cardiorespiratory and perceived strains at work. The interaction effects of work load and strength on strain depended on the sex and the muscle group in the studied work load level of elderly municipal employees.
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References
Andersen L, Henckel P (1987) Maximal voluntary isometric strength in Danish adolescents 16–19 years of age. Eur J Appl Physiol 56:83–89
Asmussen E, Heebøll-Nielsen K, Mollbech SV (1959) Methods for evaluation of muscle strength. Communications from the Testing and Observation Institute of the Danish National Association for Infantile Paralysis, Hellerup, Danmark, 5:1–13
Borg G (1970) Perceived exertion as an indicator of somatic stress. Scand J Rehabil Med 2:92–98
Ilmarinen J (1978) Beziehungen zwischen beruflicher und sportlicher körperlicher Aktivität und kardiopulmonaler Leistungsfähigkeit. Academic dissertation, Köln
Ilmarinen J (1984) Physical load on the cardiovascular system in different work tasks. Scand J Work Environ Health 10:403–408
Ilmarinen J (ed) (1985) Work, health and retirement age in the municipal sector (in Finnish, abstract in English) Studies from the Institute of Occupational Health, Helsinki, 3:91–282
Ilmarinen J, Rutenfranz J (1980) Occupationally induced stress, strain and peak loads as related to age. Scand J Work Environ Health 6:274–282
Klimmer F, Kylian H, Ilmarinen J, Rutenfranz J (1983) Arbeitsmedizinische und arbeitsphysiologische Untersuchungen bei verschiedenen Tätigkeiten im Bauhauptgewerbe. Arbeitsmedizin Sozialmedizin Präventivmedizin 6:143–147
Klimmer F, Kylian H, Ilmarinen J, Ilmarinen R, Meyer R, Piekarski C, Rutenfranz J (1984) Belastung und Beanspruchung bei Tätigkeiten in der Eisen- und Stahlindustrie. Arbeitsmedizin Sozialmedizin Präventivmedizin 19:49–54
Landau K (1978) Das arbeitswissenschaftliche Erhebungsverfahren zur Tätigkeitsanalyse-AET. Doctoral dissertation, University of Darmstadt, FRG
Louhevaara V, Tuomi T, Smolander J, Korhonen O, Tossavainen A, Jaakkola J (1985) Cardiorespiratory strain in jobs that require respiratory protection. Int Arch Occup Environ Health 55:195–206
Mital A, Das B (1987) Human strength and occupational safety. Clin Biomechanics 2:97–106
Morrisey S (1987) Influences of task posture on physiological task responses. Int J Ind Erg 1:309–217
Nummi J, Järvinen T, Stambej U, Wickström G (1978) Diminished dynamic performance capacity of back and abdominal muscles in concrete reinforcement workers. Scand J Work Environ Health 4 Suppl 1:39–46
Nygård C-H, Luopajärvi T, Cedercreutz G, Ilmarinen J (1987a) Musculoskeletal capacity of employees aged 44 to 58 years in physical, mental and mixed types of work. Eur J Appl Physiol 56:555–561
Nygård C-H, Suurnäkki T, Landau K, Ilmarinen J (1987b) Musculoskeletal load of municipal employees aged 44 to 58 years in different occupational groups. Int Arch Occup Environ Health 59:251–261
Oja P, Louhevaara V, Korhonen O (1977) Age and sex as determinants of the relative aerobic strain of nonmotorized mail delivery. Scand J Work Environ Health 3:225–233
Pandolf K (1982) Differentiated ratings of perceived exertion during physical exercise. Medicine and Science in Sports and Exercise 14:397–455
Rohmert W (1984) Das Belastungs-Beanspruchungs-Konzept. Zeitung für Arbeitswiss 38:193–200
Rohmert W, Landau K (1983) A new technique for job analysis. Taylor and Francis Ltd, London New York
Rohmert W, Rutenfranz J (1975) Arbeitswissenschaftliche Beurteilung der Belastung und Beanspruchung an unterschiedlichen industriellen Arbeitsplätzen. Der Bundesminister für Arbeit und Sozialordnung, Bonn
Rutenfranz J (1982) Recent advances in the field of work physiology: heavy work, body positions, shiftwork. Conferenza tennta alla Fondazione Carlo Erba, Milano
Rutenfranz J (1985) Arbeitsphysiologie. In: Valentin H, Lehnert G, Petry H, Rutenfranz J, Stalder K, Wittgens H, Woitowitz H-J (eds) Arbeitsphysiologie und Arbeitshygiene. Grundlagen für Prävention und Begutachtung. Thieme, Stuttgart New York, 3rd ed, pp 22–144
Rutenfranz J, Hettinger Th, Ilmarinen J, Klimmer F (1976) Beurteilung der Eignung zu schwerer körperlicher Arbeit. In: Drasche H, Essing H-G, Florian H-J, Hettinger Th, Ilmarinen J, Ilmarinen R, Jansen G, Klimmer F, Klosterkötter W, Lehnert G, Rohmert W, Rutenfranz J, Schäcke G, Schütz A, Szadkowski D, Valentin H, Wenzel HG, Woitowitz H-J (eds) Ökologischer Kurs: Teil Arbeitsmedizin. Enke, Stuttgart, pp 12–24
Rutenfranz J, Seliger V, Andersen KL, Ilmarinen J, Flöring R, Rutenfranz M, Klimmer F (1977) Erfahrungen mit einem transportablen Gerät zur kontinuerlichen Registrierung der Herzfrequenz für Zeiten bis zu 24 Stunden. Eur J Appl Physiol 36:171–185
Sämann W (1970) Characteristische Merkmale und Auswirkungen ungünstiger Arbeitshaltungen. Schriftenreihe „Arbeitswissenschaft und Praxis“, Band 17. Beuth-Vertrieb, Berlin
Saris WHM, Snel P, Baecke J, van Waesberghe F, Binkhorst RA (1977) A portable miniature solid-state heart rate recorder for monitoring daily physical activity. In: Kimmich HP (ed) Biotelemetry 4. Karger, Basel, pp 131–140
Snook S (1987) Approaches to preplacement testing and selection of workers. Ergonomics 30:241–247
Suurnäkki T, Nygård C-H, Ilmarinen J, Peltomaa T, Järvenpää I, Järvinen M, Nieminen K, Huuhtanen P (1985) Stress and strain in municipal occupations (In Finnish, abstract in English). Studies from the Institute of Occupational Health, Helsinki, 3:239–261
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Nygård, C.H., Suurnäkki, T. & Ilmarinen, J. Effects of musculoskeletal work load and muscle strength on strain at work in women and men aged 44 to 58 years. Europ. J. Appl. Physiol. 58, 13–19 (1988). https://doi.org/10.1007/BF00636597
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DOI: https://doi.org/10.1007/BF00636597