Monday, 18 February 2013
Effects of Acute exercise on the body part I
Introduction
During acute exercise your
body goes through changes in response to the disruption of
homeostasis, as exercise begins the bodily systems kick into action,
these systems include the musculoskeletal system, respiratory system,
cardiovascular system as well as the energy systems all work in
harmony in order to allow the vast network of systems and components
that make up what we know as our body to function during acute
exercise.
The exercise studied is the air squat as shown.
Brief overview of
energy systems during acute exercise
During Tabata exercises (4
minutes of 20 seconds work and 10 seconds rest) the body must use all
its bodily functions in order to allow you to complete this short but
intense exercise, say the exercise used was squats, as the first
round of exercise begins the ATP phosphocreatine system
instantaneously kicks into play allowing you to quickly manoeuvre,
and perform say 21 squats, however, after the first 10 second rest
your ATP PC system will not have recovered fully enough for it to
play a part within the exercise from now, as this system recovers
the body recruits the lactic acid system, this is the point at which
the exercise begins to become notoriously intense. As the subject
completes the exercise lactic acid builds within their muscles
causing a painful and heavy sensation on the subjects’ legs.
However, due to the 10 second rest period the body also has the
ability to use the aerobic system in order to provide ATP, not only
is the use of this extremely efficient energy system helpful to the
body in providing ATP for the muscles to use it also helps to combat
the lactic acid within the muscles changing it to pyruvate acid. As
the body does this it also recruits the bodies other systems in order
to allow the energy systems to work efficiently leading to an
increase in breathing rate as well as an increased beats per minute.
Effects on the
energy systems
ATP PC
As movements begin the ATP
PC system ignites a fire allowing intense high paced movements
possible, as the system fires it’s behaves similarly to a turbo
booster and releases a high amount of energy in a short period of
time, as this happens your heart rate immediately increases allowing
the ATP in your blood to fuel your muscles as you motor through the
first exercises at an almost inhumane pace, the phosphocreatine
stores begin their catalysed chemical reactions as the
phosphocreatine particles release the phosphate molecules as they
attach to the ADP to create ATP, this rapid fire energy system whilst
being extremely powerful has a very brief duration which it can be
used for. As the ATP PC system can no longer sustain the energy
release it begins to use muscle glycogen to provide energy, this is
important due to the fact the lactic acid system itself uses the
muscle glycogen for energy, therefore this signals the switch of
energy systems for the body.
As the exercise is
continued the ATP PC system begins recovery, the lactic acid system
begins providing energy for the body, after an average 2 minutes the
phosphocreatine system has recovered an adequate amount for it to
provide added explosive energy.
This explosive energy is
important as it allows the body to keep a high rate of pace in the
time the body begins using the aerobic system more than the anaerobic
system, and allows the body to fire up increasing the pace of the
work output without producing carbon dioxide or lactic acid.
As the energy system is
used more in high intensity exercises with little rest the recovery
rate can dramatically decrease allowing greater use of the ATP PC
system during exercise, as the phosphocreatine stores deplete
creatine molecules bond with other phosphate molecules within your
muscle stores.
This diagram shows how the
ATP PC system functions, as you can see the reaction is extremely
quick and simple adding to its short duration yet powerful output.
Part 2 focuses on the lactic acid system and aerobic system
Rdellatraining.com
Stanley
P. Brown, Introduction to Exercise Science, published Oct 2000.
Subscribe to:
Posts (Atom)