scholarly journals Effect of long‐term maximum strength training on explosive strength, neural and contractile properties

2022 ◽  
Author(s):  
Thomas G. Balshaw ◽  
Garry J. Massey ◽  
Thomas M. Maden‐Wilkinson ◽  
Marcel B. Lanza ◽  
Jonathan P. Folland
Keyword(s):  
Strength Training ◽  
Contractile Properties ◽  
Maximum Strength ◽  
Explosive Strength

CHARACTERISTICS OF POST-FLIGHT MUSCLE STRENGTH AND VELOCITY DYNAMICS IN COSMONAUTS AS A FUNCTION OF WEIGHT LOADING DURING LONG-TERM SPACE MISSIONS

2020 ◽  
Vol 54 (5) ◽  
pp. 23-28
Author(s):  
E.V. Fomina ◽  
◽  
T.B. Kukoba ◽  
Keyword(s):  
Muscle Strength ◽  
Body Mass ◽  
Flight Muscle ◽  
Space Mission ◽  
The Body ◽  
Maximum Strength ◽  
Training Device ◽  
Leg Muscle ◽  
Weight Loading

Testing of 25 cosmonauts showed that the amount of resistance training weight loading in long-term space mission influences dynamics of the leg-muscle strength and velocity recovery. On Earth, the loads equal from 70 to 130 % of the body mass is sufficient for keeping up endurance and maximum strength moments of shin and thigh muscles. In the group of cosmonauts who had not used the strength training device or chosen loads less than 30 % of the body mass the leg-muscle maximum strength and thigh endurance were decreased substantially on day 4 of return and all the more by day 15 back on Earth.

scholarly journals The significance of Gerta Vrbová's low-frequency stimulation experiment

2021 ◽  
Author(s):  
Dirk Pette
Keyword(s):  
Low Frequency ◽  
Basic Research ◽  
Contractile Properties ◽  
Scientific Cooperation ◽  
Low Frequency Stimulation ◽  
Slow Twitch Muscle ◽  
Frequency Stimulation ◽  
Time Courses ◽  
Fast Twitch

An inspiring scientific cooperation has come to an end, when Gerta Vrbová, an internationally renowned researcher in the field of neuromuscular interactions, passed away on October 2, 2020. Comparative EMG studies had led Gerta to suggest that different contractile properties of fast- and slow-twitch muscle fibers relate to specific firing patterns of their motoneurones. In support of her hypothesis, long term stimulation of fast-twitch muscles with a stimulus pattern resembling that of slow motoneurones, were shown to induce a pronounced fast-to-slow shift in contractile properties. In our cooperation which started in 1970, and also in cooperation with others, Gerta's experiment proved to be an ideal model for the study of neurally controlled changes in phenotype characteristics at various levels of molecular and cellular organization, their time courses and ranges. It has become most important in basic research on the adaptive potential or plasticity of muscle.

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