Acute effects of an intensity- versus load-controlled resistance exercise protocol on time-under-tension and physical work in older adults

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Deutscher übersetzter Titel:Vergleich der akuten Effekte eines intensitätsgesteuerten gegenüber eines belastungsgesteuerten Widerstandstrainingsprotokolls im hinblick auf der Zeit unter Spannung und körperliche Arbeit bei älteren Erwachsenen
Autor:Morat, Tobias; Lünzer, Sven; Preufl, Peter; Mechling, Heinz
Erschienen in:Gazzetta medica italiana - archivio per le scienze mediche
Veröffentlicht:174 (2015), 6, S. 281-290, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:0016-5670, 0393-3660, 1827-1812
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Erfassungsnummer:PU201709007604
Quelle:BISp

Abstract des Autors

Aim: Good muscular strength is decisive to manage tasks of daily life and to prevent falls. However, within recommendations of resistance training for counteracting the age-related loss of muscle mass, is a lack of information about training control. The aim of this study was to examine the effects of the implementation of two different protocols of training control (intensity-controlled through percentage [%] of maximum strength [1RM] versus repetition-controlled) during resistance training with older adults on time-under-tension (TUT) and physical work. Methods: Fourteen older adults (age of 64.8±3.1 years) participated in this cross-sectional test-retest study and were measured at an interval of one week with two different protocols (intensity-controlled [CInt] versus repetition-controlled [CRep]) in the exercise ?seated chest press? Results: Within CInt, the repetitions were reduced by about 49% across the sets; in CRep the load was reduced by about 20% across the sets. There was no significant difference with respect to executed repetitions and TUT between CInt and CRep, but there was a significant difference between single sets (p<0.001). Physical work demonstrated a significant reduction across the sets in CRep. Total physical work was higher in CRep (4934 N?m) compared to CInt (4349 N?m). Conclusion: A target number of repetitions with adapted load (repetition-controlled protocol) in consecutive sets was preferable if a high amount of physical work should be achieved and load intensity should not increase in subsequent sets. With the repetition-controlled protocol, high mechanical and metabolic stress is presumable, resulting in higher hypertrophic effects.