respiratory system increase in tidal volume, vital lung
capacity, and diffusion ability (Sebastianus, 2011)
When a soccer player runs dribbling, the leg
muscles must be able to withstand the weight of the
body and protect the ball from the opponent's
interference. Systematic training is training that is
repeated and planned carefully and carried out
according to the schedule applied. Athletes' muscle
strength and agility can be increase using weight
training. Various opinions say that leg muscle strength
to running speed is one of the physical components
used when playing football, especially in dribbling
(Patraserasah, 2017).
Ankle weight can increase agility in football
players. Weight training in the ankle weight is one of
the methods to improve physical condition, and the
muscles will contract and become stronger.
Neurotransmitters release acetylcholine and then
delivered to the muscle membrane and stimulate the
sarcoplasmic reticulum to release calcium and then
binds troponin, causing ductal actin and myosin to
pull, resulting in muscle contraction. Weight training
will be added with the aim that muscle strength will
be more effective if given a slight load above its
ability, it aims to adapt the functional body so that
there is an increase in muscle strength and indirectly
power and flexibility will also increase, where power
and flexibility are combined in agility (Hudriah, 2018)
One of the supporting factors to Dribbling is leg
muscle strength when players run by dribbling, and
leg muscles can hold the load and balance the body for
better movement (Lutan, 2006). Ankle weight
exercise is used to increase the strength of leg
muscles. Weight training with ankle weight exercise
is included in isotonic movements because, during
contractions, there is a constant tension with changes
in muscle length (Riyadi, 2008). Isotonic movements
contract with the same tension or weight constantly
with changes in muscle length (Sidik & Giriwijoyo,
2014)
Weight training causes muscles to become
hypertrophy, thereby increasing volume in each
muscle fiber, increasing the number of blood vessels
in muscle fibers and cell organelles in muscles
(Kalangi, 2014; Sidik & Giriwijoyo, 2014). This
enlargement occurs because of the increase in
contractile elements in the fibers, causing increased
strength of muscle contraction or active strength of
muscles, thickened sarcolemma, increased connective
tissue between muscle fibers, which can increase
muscle strength and increase running speed (Sidik &
Giriwijoyo, 2014). The hypertrophy in the muscles
causes the formation of new muscle fibers, and
mitochondria have increased (Colson & Collison,
1983). Mitochondria play a role in the formation of
ATP for the action of actin and myosin faster, so that
muscle contraction is faster. Mitochondria also play a
role in providing energy for the process of muscle
contraction and increased muscular endurance (Birch
K., McLaren D., 2005; Guyton & Hall, 2006)
This ankle weight exercise causes hypertrophy in
muscle cells, which can increase muscle strength and
power. Running speed has elements of good muscular
strength and leg power. This ankle weight exercise
uses the De Lorme method with a load of 10 RM with
eight sets (Lesmana, 2005)
Long passing to be effective in their movements
because one of the supporting factors is leg muscle
strength when the player passes the ball the leg
muscles can hold the load and balance the fulcrum of
the body to be more precise when kicking the ball over
long distances (Lutan, 2006). Ankle weight exercise
is used to increase leg muscle strength used for
running, namely m. Quadriceps femoris, m. Gluteus
maximus, m. Iliopsoas, m. Hamstring, m. Triceps
surae.
The research of Radjiku et al. (2013) is a relevant
study to this research, and there is the effect of ankle
weight training on increasing the power of long
passing kicks in the soccer game of male students in
class VII.
4 CONCLUSION
Ankle weight exercise effective to increase football
player's agility, speed, and long passing power
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