Results 11 to 20 of about 103,012 (264)

Evidence of validity and reliability of Jumpo 2 and MyJump 2 for estimating vertical jump variables [PDF]

PeerJ, 2023
Background We investigated the concurrent validity and test-retest reliability of the Jumpo 2 and MyJump 2 apps for estimating jump height, and the mean values of force, velocity, and power produced during countermovement (CMJ) and squat jumps (SJ ...
Amilton Vieira, Gabriela L. Ribeiro, Victor Macedo, Valdinar de Araújo Rocha Junior, Roberto de Souza Baptista, Carlos Gonçalves, Rafael Cunha, James Tufano   +7 more
doaj   +2 more sources

Validity and intra-session reliability of a low-cost device for assessing isometric mid-thigh pull force

Human Movement, 2023
Purpose The isometric mid-thigh pull (IMTP) test is a strength test usually requiring expensive equipment like a force platform. Low-cost alternatives could make IMTP testing more accessible. Previous research reported high systematic bias when comparing
Diego Couto, Rafael Cunha, Victor Lage, Valdinar Rocha-Junior, Wanderson Santos, João B. Ferreira-Junior, James Tufano, Amilton Vieira   +7 more
doaj   +1 more source

Life-long sports engagement enhances adult erythrocyte adenylate energetics

Scientific Reports, 2021
Regular physical activity reduces age-related metabolic and functional decline. The energy stored in adenine nucleotides (ATP, ADP, and AMP) is essential to enable multiple vital functions of erythrocytes and body tissues.
Barbara Pospieszna, Krzysztof Kusy, Ewa Maria Slominska, Jacek Zieliński   +3 more
doaj   +1 more source

Correlations between horizontal jump and sprint acceleration and maximal speed performance: a systematic review and meta-analysis [PDF]

PeerJ, 2023
Objectives The purpose of this study is to determine the associations between horizontal jump and sprint acceleration, as well as maximal speed performance.
Junlei Lin, Jie Shen, Junjie Zhang, Aiguo Zhou, Wenxia Guo   +4 more
doaj   +2 more sources

Analysis of VO2MAX Differences between Laboratory Test and Field Test in Rowing

Jurnal Pendidikan Jasmani dan Olahraga, 2021
The purpose of this study was to analyze the results of VO2max measurement using laboratory test and field test. This research is a descriptive quantitative research with a comparative approach.
Angga Muhammad Syahid
doaj   +1 more source

Plasma Concentration of Irisin and Brain-Derived-Neurotrophic Factor and Their Association With the Level of Erythrocyte Adenine Nucleotides in Response to Long-Term Endurance Training at Rest and After a Single Bout of Exercise

Frontiers in Physiology, 2020
The study aimed to assess the effect of a single bout of incremental exercise on irisin and BDNF plasma concentrations as related to erythrocyte purine nucleotides concentration at rest and after exercise.
Ewa Rodziewicz, Magdalena Król-Zielińska, Jacek Zieliński, Krzysztof Kusy, Ewa Ziemann   +4 more
doaj   +1 more source

The contribution of energy systems during 15-second sprint exercise in athletes of different sports specializations [PDF]

PeerJ
Background Long-term adaptations and ongoing training seem to modify the energy system contribution in highly trained individuals. We aimed to compare the energy metabolism profile during sprint exercise in athletes of different specialties.
Damian Archacki, Jacek Zieliński, Barbara Pospieszna, Michał Włodarczyk, Krzysztof Kusy   +4 more
doaj   +2 more sources

Exploring the Impact of Training Methods on Repeated Sprints in Hypoxia Training Effects

Oxygen, 2023
Background: Emerging evidence suggests that the outcomes of hypoxia training may be influenced by various factors, contingent upon the chosen method, such as chamber, tent, or mask. This study aimed to examine how different training methods influence the
Daniel Rojas-Valverde, Aldo A. Vasquez-Bonilla, Rafael Timón, Joan M. Feliu-Ilvonen, Ismael Martínez-Guardado, Guillermo Olcina   +5 more
doaj   +1 more source

Changes in red blood cell parameters during incremental exercise in highly trained athletes of different sport specializations [PDF]

PeerJ
Background During physical exercise, the level of hematological parameters change depending on the intensity and duration of exercise and the individual’s physical fitness.
Monika Ciekot-Sołtysiak, Krzysztof Kusy, Tomasz Podgórski, Barbara Pospieszna, Jacek Zieliński   +4 more
doaj   +2 more sources

“The Physical Condition of the Planets” [PDF]

Nature, 1941
I HAD not meant to express any special views about critical temperature. It is true that the atmospheres of Jupiter and Saturn are above the critical temperatures of some substances, but I imagine critical temperatures become completely unimportant when the pressure is 10,000 or more times the critical pressure; the a/v2 of Van der Waals becomes ...
openaire   +2 more sources