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Muscle damage = muscle building !?
Muscle damage has long been considered the primary trigger for muscle growth. However, according to recent studies, this theory should be reevaluated.
Exercise science provides increasingly detailed insights
into the physiological processes that lead to muscle growth. In this context,
current scientific publications particularly deal with the role of the smallest
injuries (microtraumas). Against the background of these findings, the question
arises whether training mentalities such as "No pain, no gain" or
"One more rep" are actually the most effective way to build muscle.
Physiological processes
in muscle building
Hypertrophy effects can only be achieved if, on the muscular
level, the rate of protein-building (protein synthesis) exceeds the rate of
degradation. The general prerequisite for this is a stimulus that is effective
for training , in combination with sufficient protein intakeon nutrition
(Krzysztofik et al. 2019). For a long time, a combination of high
training-induced mechanical tension and the smallest muscle damage was seen as
a decisive factor in stimulating muscle growth. At the cellular level, these stimuli
lead, among other things, to the immigration of satellite cells into the muscle
fiber. This in turn leads to an increased protein synthesis and thus ultimately
to an enlargement of the muscle cross-section (Schoenfeld 2010). Although all
of these factors have been shown to play a role in hypertrophy training, the
impact of microtraumas in particular needs to be reassessed.
Microtraumas as a result of strength
training
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