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Strength training can be a safe form of
exercising, however each category has it advantages as well as
disadvantages. Weight training can be one of the safest forms of
exercise, especially when the movements are performed correctly.
However, as with any form of exercise, improper execution can
result in injury. When the trainee becomes fatigued, technique
can break down. For example, the allows heavy weights to be
lifted with correct technique. If the lower back fatigues and is
allowed to round, the resulting uneven spinal loading can cause
disk compression injuries.
An
exercise should be halted if marked or sudden pain is felt, to
prevent further injury. However, not all discomfort indicates
injury. Weight training exercises are brief but very intense,
and many people are unaccustomed to this level of effort. The
expression "no pain, no gain" refers to the discomfort expected
from such vigorous effort. It does not suggest ignoring the more
severe pain that comes from injury.
Discomfort can arise from other factors.
Individuals who perform large numbers of repetitions, sets and
exercises for each muscle group may experience lactic acid
build-up in their muscles, which, contrary to popular belief, is
not the cause of the harmless burning sensation in the muscles.
These individuals may also experience a swelling sensation in
their muscles from increased blood flow , which is also
harmless.
Beginners
are advised to build up slowly to a weight training program.
Untrained individuals may have some muscles that are
comparatively stronger than others. An injury can result if, in
a particular exercise, the primary muscle is stronger than its
stabilising muscles. Building up slowly allows muscles time to
develop appropriate strengths relative to each other. This can
also help to minimise delayed onset muscle soreness. A sudden
start to an intense program can cause significant muscular
soreness. Unexercised muscles contain cross-linkages that are
torn during intense exercise.
Weight trainers commonly spend 5 to 20
minutes warming up their muscles with aerobic exercise before
starting a workout. They also stretch muscles after they have
been exercised. The exercises are performed at a steady pace,
taking at least two to four seconds to lift and lower the
weight, to avoid jerks that can damage muscles and
joints.Exercises where a barbell is held above the body.
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