1. Combined Strength and Endurance Session Order: Differences in Force Production and Oxygen Uptake.
- Author
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Taipale, Ritva S., Mikkola, Jussi, Nummela, Ari T., Sorvisto, Juha, Nyman, Kai, Kyröläinen, Heikki, and Häkkinen, Keijo
- Subjects
LEG physiology ,BODY composition ,ISOMETRIC exercise ,ANTHROPOMETRY ,BIOMECHANICS ,CARDIOPULMONARY system ,CLINICAL trials ,STATISTICAL correlation ,CROSSOVER trials ,EXERCISE physiology ,EXERCISE tests ,GROUND reaction forces (Biomechanics) ,HEART rate monitoring ,BIOELECTRIC impedance ,JUMPING ,LACTATES ,MUSCLE strength testing ,PROBABILITY theory ,RESEARCH funding ,RUNNING ,STATISTICAL sampling ,SEX distribution ,STATISTICS ,DATA analysis ,TREADMILLS ,RANDOMIZED controlled trials ,OXYGEN consumption ,EXERCISE intensity ,DATA analysis software ,DESCRIPTIVE statistics ,RESISTANCE training - Abstract
Purpose: To examine acute responses of force production and oxygen uptake to combined strength (S) and endurance-running (E) loading sessions in which the order of exercises is reversed (ES vs SE). Methods: This crossover study design included recreationally endurance-trained men and women (age 21-45 y; n = 12 men, 10 women) who performed ES and SE loadings. Force production of the lower extremities including countermovement-jump height (CMJ) and maximal isometric strength (MVC) was measured pre-, mid-, and post-ES and -SE, and ground-reaction forces, ground-reaction times, and running economy were measured during E. Results: A significant decrease in CMJ was observed after combined ES and SE in men (4.5% ± 7.0% and 6.6% ± 7.7%, respectively) but not in women (0.2% ± 8.5% and 1.4% ± 7.3% in ES and SE). MVC decreased significantly in both men (20.7% ± 6.1% ES and 19.3% ± 9.4% SE) and women (12.4% ± 9.3% ES and 11.6% ± 12.0% SE). Stride length decreased significantly in ES and SE men, but not in women. No changes were observed in ground-reaction times during running in men or women. Performing S before E caused greater (P < .01) oxygen uptake during running in both men and women than if E was performed before S, although heart rate and blood lactate were similar between ES and SE. Conclusions: Performing S before E increased oxygen uptake during E, which is explained, in part, by a decrease in MVC in both men and women, decreased CMJ and stride length in men, and/or an increase in postexercise oxygen consumption. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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