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Amelia Guadalupe-Grau, Susana Aznar-Laín, Asier Mañas, Juan Castellanos, Julián Alcázar, Ignacio Ara, Esmeralda Mata, Rosa Daimiel, and Francisco José García-García

To investigate the short- and long-term effects of concurrent strength and high-intensity interval training (HIIT) on octogenarian COPD patients, nine males (age = 84.2 ± 2.8 years, BMI = 29.3 ± 2.3) with low to severe COPD levels (2.1 ± 1.5 BODE index) underwent a supervised 9-week strength and HIIT exercise program. Training had a significant (p < .05) impact on senior fitness test scores (23–45%), 30-m walking speed (from 1.29 ± 0.29–1.62 ± 0.33 m/s), leg and chest press 1RM (38% and 45% respectively), maximal isometric strength (30–35%), and 6-min walking test (from 286.1 ± 107.2–396.2 ± 106.5 m), and tended to increase predicted forced vital capacity by 14% (p = .07). One year after the intervention all training-induced gains returned to their preintervention values except for the chest press 1RM (p <.05). Short-term concurrent strength and HIIT training increases physical fitness in the oldest-old COPD patients, and has potential long-term benefits.

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Ritva S. Taipale, Jussi Mikkola, Ari T. Nummela, Juha Sorvisto, Kai Nyman, Heikki Kyröläinen, and Keijo Häkkinen

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.

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Piia Kaikkonen, Esa Hynynen, Arto Hautala, and Juha P. Ahtiainen

Purpose: It is known that modifying the endurance-type training load of athletes may result in altered cardiac autonomic modulation that may be estimated with heart rate variability (HRV). However, the specific effects of intensive resistance-type training remain unclear. The main aim of this study was to find out whether an intensive 2-wk resistance training period affects the nocturnal HRV and strength performance of healthy participants. Methods: Young healthy men (N = 13, age 24 [2] y) performed 2-wk baseline training, 2-wk intensive training, and a 9-d tapering periods, with 2, 5, and 2 hypertrophic whole-body resistance exercise sessions per week, respectively. Maximal isometric and dynamic strength were tested at the end of these training periods. Nocturnal HRV was also analyzed at the end of these training periods. Results: As a main finding, the nocturnal root mean square of differences of successive R-R intervals decreased (P = .004; from 49 [18] to 43 [15] ms; 95% CI, 2.4–10.4; effect size = 0.97) during the 2-wk intensive resistance training period. In addition, maximal isometric strength improved slightly (P = .045; from 3933 [1362] to 4138 [1540] N; 95% CI, 5.4–404; effect size = 0.60). No changes were found in 1-repetition-maximum leg press or leg press repetitions at 80% 1-repetition maximum. Conclusions: The present data suggest that increased training load due to a short-term intensive resistance training period can be detected by nocturnal HRV. However, despite short-term accumulated physiological stress, a tendency of improvement in strength performance was detected.

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Differentially Affects Maximal Isometric Strength and Time to Fatigue in Large and Small Muscle Groups Richard L. Urbanski * Steven F. Loy * William J. Vincent * Ben B. Yaspelkis III * 6 1999 9 9 2 2 136 136 145 145 10.1123/ijsn.9.2.136 Effects of In-Season (5 Weeks) Creatine and Pyruvate

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Borja Muniz-Pardos, Alejandro Gómez-Bruton, Ángel Matute-Llorente, Alex González-Agüero, Alba Gómez-Cabello, José A. Casajús, and Germán Vicente-Rodríguez

dynamic tests (30-m sprint test, horizontal jump, and CMJ) with special emphasis in the assessment of the stretch and shortening cycle in the lower-extremities. Regarding the LBS isometric tests, maximal isometric strength from the half-squat position was measured using a force platform (Kistler Type 9260

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Deborah Hebling Spinoso, Nise Ribeiro Marques, Dain Patrick LaRoche, Camilla Zamfollini Hallal, Aline Harumi Karuka, Fernanda Cristina Milanezi, and Mauro Gonçalves

researchers’. The study of FD was continued by Samuel et al. ( 2011 ), who measured knee and hip torques during both stair ascent and descent relative to maximal isometric strength. They found in their older adult sample that knee extensor FD was 103% during stair ascent and 120% during stair descent. Hip

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Andrzej Kochanowicz, Bartłomiej Niespodziński, Jan Mieszkowski, Stanisław Sawczyn, Paweł Cięszczyk, and Kazimierz Kochanowicz

showed that early stages of gymnastic training developed the elbow’s maximal isometric strength toward both extensor and flexor muscles. Increased muscle strength for EE was reflected by its use during gymnastic routines; athletes use mainly isometric contractions of the elbow extensors to maintain the

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Bin Chen, Lifen Liu, Lincoln Bin Chen, Xianxin Cao, Peng Han, Chenhao Wang, and Qi Qi

ID: 20621547 doi: 10.1016/j.math.2010.05.005 20621547 4. Romero-Franco N , Fernandez-Dominguez JC , Montano-Munuera JA , Romero-Franco J , Jimenez-Reyes P . Validity and reliability of a low-cost dynamometer to assess maximal isometric strength of upper limb . J Sports Sci . 2019

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Erika Zemková and Michal Jeleň

in the study only if they subjectively did not report pain in the lumbar region during the maximal isometric strength test. Individuals who had previously undergone surgery or other medically invasive procedures for low back pain were excluded from participation in the study. All participants were

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Jose Morales, Carla Ubasart, Mónica Solana-Tramunt, Israel Villarrasa-Sapiña, Luis-Millán González, David Fukuda, and Emerson Franchini

physical aspects concerning performance in judo, include maximum isometric strength, reaction time (RT), and balance. 11 , 12 Few studies have indicated a decrease in maximal isometric strength after RWL in grappling combat sports, 13 , 14 while the majority of studies reviewed did not report significant