Jump Rope Wood
Jump Rope Wood
Interviews Mel Siff cutting calories and weight loss
Mel Siff Here we give an overview of some of the ingenious work back in South Africa in Plyometrics for (or powermetrics that he liked to call them) – This is the group he formed in 2000 that is still very good – http://health.groups.yahoo.com/group/Supertraining/
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Drop Jumps and various standing exercises are so widely used as a means of
plyometric training that we often tend to forget that they can be classic
done in many other ways, such as using the Common childrena € ™ s swing we
all used to play in public parks. With it, you simply set
swing near a wall so that you can swing at different heights and strike
wall with your feet to provide the rebound. For those who have our
manuals, â € € œSupertrainingâ (SIFF & Verkhoshansky 1999), see P275 for diagrams
this exercise.
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This way, you do not have to buy a large supply of boxes costly â € € œplyoâ – all
you need is the rope, wood and something to hang your swing and
you have a training plyometric very controllable. With a little
ingenuity, you can even organize a wooden wall at hand height that will
you push off with hands, as well. (Â € € Supertrainingâ for P275
diagrams.)
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Of course, you can make these devices more complex and technical to
you can make accurate measurements biomechanics with them. For
those of our textbooks, â ŒSupertrainingâ € € on page 219, you'll see a
diagram of a special training plyometric my senior engineering students
built at the University of Witwatersrand (South Africa) in 1992.
The same students have also constructed several higher swings and lower body with
built in the load cell or force plates to measure the forces exerted during
impact.
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Recently I came across the following research article that has made
much the same kind of work that my engineers had been made. I think
you will find many interesting results.
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T Fowler NE, Lees A & Reilly size changes following plyometric
drop-jump and pendulum exercises. Ergonomics in December 1997, 40 (12) :1279-86
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The objective of this study was compare changes in size after the
performance of plyometric exercises using drop-jumps and a pendulum.
Eight men aged 21.7 + / – 1.8 years, with experience of plyometric
training has given their consent to act as subjects. Participants
undertook two exercise programs and a permanent test of 15 min in random order.
The exercises led to the performance of 50 drop-jumps from a height of 0.28
m or 50 pendulum rebounds (on a wall).
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Participants were instructed to perform jumps or rebounds using a maximum
â € ~ bounce € ™ style. The major steps have been performed after a period of 20 min
of standing (pre-exercise), 2-min after exercise (post exercise) and after
20-min standing recovery (recovery). Back pain and muscle soreness were
assessed using a visual-analogue scale, at each time above and
24 hours and 36 hours after the test. Peak torque during isokinetic knee
extension to 1.04 rad / LP was measured immediately before and after
exercise sessions to assess the degree of muscle fatigue.
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Ground / wall reaction force data were recorded using a Kistler force platform
mounted the floor for drop-jumps and vertically on the wall to bounce
pendulum exercises. Drop-jumps resulted in the greatest change in size
(-2.71 M), compared to pendulum exercises (-1.77 mm) and permanent (-0.39mm).
The two regimes of exercise significantly decreased size when
compared to the steady state. Drop-jumps resulted in significantly
greater force of impact peak (p <0.05) than pendulum exercises (drop-jumps =
3.2 x body weight, pendulum = 2.6 x body weight).
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The two exercise conditions both invoked a low degree of muscle soreness
but there were no significant differences between both. Both exercises
patterns resulted in a nonsignificant decrease of peak torque, indicating a
similar degree of muscle fatigue. On the basis of the lower height and lower
forces advanced, it can be concluded that pendulum exercises are fewer injuries
potential for lower back than drop-jumps performed from a height of 28 cm.
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*** What does this mean for the coach? Well, firstly She stresses that
it is a real place for the use of plyometric SWING as a safe and
effective form of training in explosives. Second, it shows that
* Risk of injury is greater with jumping down, because of the greater
impact forces performed on the entire body.
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However, it must be emphasized that the body can adapt to such constraints,
but this injury is a good reason for any drop jumps must be
prescribed carefully and intelligently, especially in novices, whose
musculoskeletal system has not sufficiently adapted to the impulsive load.
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Regarding the experiment, it is also worth noting that, if 50
Rehearsals are to do, so it is essential that they are in fact limited
series from a few repetitions at a time, not as a kind of endurance
exercise. In the U.S. many coaches tend to prescribe too many plyometric
repetitions at a time. More is not necessarily better. In the case of
plyometrics, the quality is much more important than quantity.
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Mel Siff
About the Author
Dr Mel Siff
Author of Supertraining + Facts and Fallacies of Fitness
http://www.melsiff.com
Joe Wood Skipping
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