Effect of time of concentric muscle actions on strength, hypertrophy, and specific tension in resistance-trained women

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dc.contributor.authorGillies, Ellen Maureenen_US
dc.date.accessioned2024-08-13T22:54:20Z
dc.date.available2024-08-13T22:54:20Z
dc.date.copyright1997en_US
dc.date.issued1997
dc.degree.departmentSchool of Physical Education
dc.degree.departmentSchool of Exercise Science, Physical and Health Education
dc.degree.levelMaster of Science M.Sc.en
dc.description.abstractThe study investigated the effects of different concentric muscle action times during resistance training on neuromuscular changes. Eccentric muscle action time was 2 s for both groups while the concentric phases were 8 s for the Super Slow (SS) group and 2 s for the Controlled Tempo (CT) group. 21 resistance-trained women volunteered to participate and were randomly assigned to either the SS group (n = 13, age 28.6 +/- 5.5 [SD]) or the CT group (n = 8, age 26.3 +/- 9.3). Training was conducted 3 times per week for 8 weeks with 2 sets (SS) or 4 sets (CT) of 8-10 RM using free weights to exercise the elbow flexors and extensors. 1 RM strength, 8 RM strength, relaxed and flexed arm girths, and skinfolds were measured at 0, 4, and 8 weeks. Muscle cross-sectional area (CSA), evaluated using magnetic resonance imagery, and specific tension (kg/cm2), were measured at 0 and 8 weeks. The SS and CT training protocols elicited significant and similar increases in flexor and extensor 1 RM strength at Weeks 4 and 8 (p < .01). Both groups had significant increases in 8 RM flexor and extensor strength at Week 4 (p < .01), while only the SS group had significant increases at Week 8 (p < .01). Arm girths increased significantly (p < .01) in both groups at Week 4, while only the SS group had significant (p < .05) increases at Week 8. Extensor CSA increased significantly (p < .05) in both groups, while only the SS group had significant (p < .01 ) increases in flexor CSA. The groups had significant increases in specific tension of both muscle groups at Week 8 (p < .05). In conclusion, two sets of resistance training exercises performed with a slow concentric phase were as effective as 4 sets performed more quickly, in producing increases in strength, muscle cross-sectional area, and specific tension in resistance-trained women.
dc.format.extent75 pages
dc.identifier.urihttps://hdl.handle.net/1828/17897
dc.rightsAvailable to the World Wide Weben_US
dc.titleEffect of time of concentric muscle actions on strength, hypertrophy, and specific tension in resistance-trained womenen_US
dc.typeThesisen_US

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