Acute Effect of Two Aerobic Exercise Modes on Maximum Strength and Strength Endurance

• Autores: Eduardo Oliveira de Souza, Valmor Tricoli, Emerson Franchini
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 21, Nº. 4, 2007, págs. 1286-1290
• Idioma: inglés
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• Dialnet Métricas: 4 Citas
• Resumen

  • de Souza, E.O., V. Tricoli, E. Franchini, A.C. Paulo, M. Regazzini, and C. Ugrinowitsch. Acute effect of two aerobic exercise modes on maximum strength and strength endurance. J. Strength Cond. Res. 21(4):1286-1290. 2007.-The purpose of this study was to evaluate the effects of 2 modes of aerobic exercise (continuous or intermittent) on maximum strength (1 repetition maximum, 1RM) and strength endurance (maximum repetitions at 80% of 1RM) for lower- and upper-body exercises to test the acute hypothesis in concurrent training (CT) interference. Eight physically active men (age: 26.9 ± 4.2 years; body mass: 82.1 ± 7.5 kg; height: 178.9 ± 6.0 cm) were submitted to: (a) a graded exercise test to determine O2max (39.26 ± 6.95 ml·kg?1·min?1) and anaerobic threshold velocity (3.5 mmol·L?1) (9.3 ± 1.27 km·h?1); (b) strength tests in a rested state (control); and (c) 4 experimental sessions, at least 7 days apart. The experimental sessions consisted of a 5-kilometer run on a treadmill continuously (90% of the anaerobic threshold velocity) or intermittently (1:1 minute at O2max). Ten minutes after the aerobic exercise, either a maximum strength or a strength endurance test was performed (leg press and bench press exercises). The order of aerobic and strength exercises followed a William's square distribution to avoid carryover effects. Results showed that only the intermittent aerobic exercise produced an acute interference effect on leg strength endurance, decreasing significantly (p < 0.05) the number of repetitions from 10.8 ± 2.5 to 8.1 ± 2.2. Maximum strength was not affected by the aerobic exercise mode. In conclusion, the acute interference hypothesis in concurrent training seems to occur when both aerobic and strength exercises produce significant peripheral fatigue in the same muscle group.