TY - JOUR AU - Heckel, Zoltán AU - Atlasz, Tamás AU - Tékus, Éva AU - Kőszegi, Tamás AU - Laczkó, József AU - Váczi, Márk TI - Monitoring exercise-induced muscle damage indicators and myoelectric activity during two weeks of knee extensor exercise training in young and old men JF - PLOS ONE J2 - PLOS ONE VL - 14 PY - 2019 IS - 11 PG - 16 SN - 1932-6203 DO - 10.1371/journal.pone.0224866 UR - https://m2.mtmt.hu/api/publication/30886430 ID - 30886430 AB - This study considered the effects of repeated bouts of short-term resistive exercise in old (age: 64.5±5.5 years; n = 10) and young men (age: 25.1±4.9 years; n = 10) who performed six knee extension exercise bouts over two weeks using various markers of exercise-induced muscle damage and electromyographic activity. We found that time-course changes in quadriceps isometric torque, creatine kinase activity, and muscle soreness in the two groups were similar. However, recovery in the acute torque deficit was mediated by more favourable electromyographic activity changes in the young group than in the older adults group. Muscle elastic energy storage and re-use assessed with dynamometry was selectively improved in the young group by the end of the protocol. Serum myoglobin concentration increased selectively in old group, and remained elevated with further bouts, suggesting higher sarcolemma vulnerability and less effective metabolic adaptation in the older adults, which, however, did not affect muscle contractility. LA - English DB - MTMT ER - TY - JOUR AU - Mielgo-Ayuso, J. AU - Zourdos, M.C. AU - Calleja-González, J. AU - Urdampilleta, A. AU - Ostojic, Sergej TI - Dietary intake habits and controlled training on body composition and strength in elite female volleyball players during the season JF - APPLIED PHYSIOLOGY NUTRITION AND METABOLISM-PHYSIOLOGIE APPLIQUEE NUTRITION J2 - APPL PHYSIOL NUTR ME VL - 40 PY - 2015 IS - 8 SP - 827 EP - 834 PG - 8 SN - 1715-5312 DO - 10.1139/apnm-2015-0100 UR - https://m2.mtmt.hu/api/publication/32538375 ID - 32538375 N1 - ImFINE Research Group, Department of Health and Human Performance, INEF, Technical University of Madrid, Madrid, 28040, Spain Department of Nutrition and Dietetics, Haro Volleyball Club, Nutrition Centre of La Rioja, Haro, La Rioja, 26200, Spain Department of Exercise Science and Health Promotion, Florida Atlantic University, Boca Raton, FL 33431, United States Department of Physical Education and Sports, University of Basque Country (UPV-EHU), Vitoria-Gasteiz, 01007, Spain University of Deusto, Donostia-San Sebastián, 20012, Spain Exercise Physiology Laboratory, Center for Health, Exercise and Sport Sciences, Stari DIF, Deligradska 27, Belgrade, 11000, Serbia Cited By :18 Export Date: 14 December 2021 Correspondence Address: Mielgo-Ayuso, J.; ImFINE Research Group, Spain; email: juankaya@msn.com AB - The purpose of this study was to assess dietary intake of elite female volleyball players (EFVPs, n = 22) during the first 11 weeks of the competitive season. Further, we compared findings for total energy intake and specific macronutrient distribution with the established recommendations for high-intensity athletes. Subjects also engaged in periodized training and we assessed changes in body composition (BC) and strength. Twenty-two EFVPs had dietary intake (7-day dietary recall and food-frequency questionnaire), BC (body mass index (BMI), body fat percentage, fat mass, muscle mass), and 1-repetition maximum (1RM) strength (bench press, military press, back squat, power clean, clean and jerk, pull-over) assessed at baseline (T0, before preseason) and 11 weeks later (T11). Athletes consumed less total kilocalories and carbohydrates (CHO) compared with established recommendations (total kilocalories: 40.7 ± 5.2 kcal/(kg·day)–1 vs. recommendations: 50–80 kcal/(kg·day)–1; CHO: 4.3 ± 0.6 g/(kg·day)–1 vs. recommendations: 5–8 g/(kg·day)–1). Further, subjects consumed greater protein (2.1 ± 0.4 g/(kg·day)–1) compared with recommendations (1.6–1.8 g/(kg·day)–1) and greater fat (36.1 ± 4.6% of total kilocalories) than recommendations (20%–35% of total kilocalories). There were improvements (p < 0.05) in BC from T0–T11 (body fat percentage: 17.9% ± 4.2%–16.8% ± 3.6%, –4.7% ± 7.4%; fat mass: 12.7 ± 4.2–11.9 ± 3.8 kg, –4.0% ± 9.2%; muscle mass: 42.8% ± 3.4%–43.3% ± 3.0%, +1.3 ± 3.1%) and 1RM strength (bench press: 39.1 ± 4.5–43.4 ± 4.9 kg; +11.4% ± 9.3%; clean and jerk: 29.7 ± 6.3–34 ± 5.8 kg; +17.7% ± 23.8%); however, there was no change (p > 0.05) in BMI or military press and pull-over. Back squat (p = 0.054; +33.0% ± 83.7%) and power clean (p = 0.056; +26.2% ± 49.0%) increases approached significance. Our findings indicate that EFVPs improved BC and strength despite a dietary intake different from recommendations. This is possibly due to different substrate utilization during exercise in females versus males, thus new recommendations should be considered for high-intensity athletes, which are sex-specific. © 2015, National Research Council of Canada. All rights Reserved. LA - English DB - MTMT ER - TY - JOUR AU - Jánossy, Lajos TI - The penetrating power of cosmic-ray shower particles JF - MATHEMATICAL PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY J2 - MATH PROC CAMBRIDGE VL - 34 PY - 1938 IS - 4 SP - 614 EP - 619 PG - 6 SN - 0305-0041 DO - 10.1017/S0305004100020636 UR - https://m2.mtmt.hu/api/publication/31942070 ID - 31942070 LA - English DB - MTMT ER -