SERGEI BUBKA - OVER THE BAR BY V. MANSVETOV
Posted: Fri Jun 03, 2011 10:37 am
SERGEI BUBKA
OVER THE BAR BY V. MANSVETOV
Re-printed and interpreted from, Legkaya Atletika,
12: 16-17, 1983
The best pole vaulter in the first Track and Field World Championships in 1983
was 19 year-old sportsman Sergei Bubka (5.70). The success of yesterday's
junior came about with a certain degree of uncertainty, even though the
dynamics of his results substantiates the long (10 years) and steady
(without deviations) increase in his sports mastery.
Result Dynamics
Year....................Age......................Result
1974....................10........................BG
1975....................11.......................2.70
1976....................12.......................3.50
1977....................13.......................3.60
1978....................14.......................4.40
1979....................15.......................4.80
1980....................16.......................5.10
1981....................17.......................5.40
1982....................18.......................5.55
1983....................19.......................5.72
This shows somewhat of a rejuvenation in this track and field event in
general and the need to have early specialization in this sport. And, most
important, as noted by the athletes coach, is to "pay special attention
to technical improvement, which is only possible by working closely with science."
The approach run of the athlete is 20 running steps. The jumper begins
the approach run from a stand, without any preliminary steps.
He carries the pole up high, with optimally placed hands (57cm/23") and
an extended position of the trunk. All steps in the second half of the
approach run are executed actively and from the front part of the foot.
The approach run has considerable acceleration.
On the last 15m segment before the take-off, speed achieves 9.5m/sec.
In the last 6 steps (exclusive of the pre-take-off) the athlete achieves a
relatively level tempo..
The pre-take-off stride is executed very quickly
and is gathered (shortened). Time of support last all of 0.082 sec. and
the flight 0.087 sec. With this, the jumper achieves a significant increase
in tempo on the last stride, 10.37m/ sec. Such an increase in tempo is
characteristic of record-setting jumpers (V Polyakov, 5.81m).
Fast execution of the pre-take-off stride of the approach run provides maintenance
of speed in the very take-off. It also allows for transfer of inertia from the approach
run to the entire "jumper-pole" system.
During the last two strides, the jumper uses both arms to move the pole to
the plant position. The take-off is executed through a firmly extended body,
which travels upward at an angle of 77-78. The foot steps on the projection
point of the grip (top hand). The transition from the approach run to height
on the pole is executed powerfully and quickly, in 0.11 sec.
By maintaining the accumulated speed of the approach run, the upper part of the
trunk is sent forward at take-off. Speed of movement of the shoulder joint (9.0m/sec)
is ahead of the movement of the pelvic girdle (8.0m/sec)
SUPPORT PHASE ON THE POLE, AND POLE FLEXION.
The high speed of the jumper's body movement at the end of the take-off
provides for a long execution of the hang-swing. It comprises 8.3% of the
time for the entire support portion of the jump, which is very important in
jump technique with a higher grip on a firm poles.
Such actions by the jumper serve to move the entire "jumper-pole" system forward.
We can also note a positive factor here in the nearing of the trajectory of the pole
movement (point of grip) with the horizontal. (this is seen in Figure 2)
Shown here, is the coefficient of the use of the elastic properties of the pole.
They reflect the degree of technical mastery of the jumper, especially at this point
of the jump. In Bubka, it is equal to 3.7 (the jumper uses the pole at 205 lbs. with
the grip at 4.99 and flexes it more than 1.40/33% according to the cord). It is
sufficient to say that only in Volkov during the time of the XXII Olympiad that this
coefficient was higher.
Thus, the action of the jumper, up to the moment of beginning pole extension, can be
considered highly technical (proper technique). The exception appears to be
the insufficient throwing of the body onto the spine/back.
POLE EXTENSION
The moment of the greatest flexion of the pole according to the time is
stretched out (.38 sec). The jumper continues to rotate backward with
simultaneous extension of the legs. The sighting of the jumper controls
the position of the legs relative to the pole. Extension is active but long
in time (29.7%). Effort vectors of the extending body and pole coincide.
Speed of lifting the trunk and legs upward are close to 6m/sec.
Figure…..2………………………………
.dj notes: I cannot put the Trajectory diagram here. What it shows is
one: take-off angle of an 18 degree hip trajectory….
Two: the top hand trajectory from frame 13 to 25..
Three: max bend of the pole.
Interesting to me was that the vaulter only went "up" 55cm during
the "pole bending" phase..(from plant to max bend/flat back)
ACTION ON THE EXTENDED POLE
When the jumper completes the transition (rock-back/extension) to support
on the pole, the pole is sharply and fully extended and the athlete, so to speak,
"loses it". As a consequence, at the beginning of the push-off the legs and
trunk are lowered and go far from the axis of the pole.
But the high speed of the lift (Table 1) allows the jumper to quickly go
through this situation. (Fast execution of coming out of support on the
pole is a regular occurrence in pole vaulters in their record tries).
A deficiency of Bubka here appears to be the lack of clear execution of
the transition of effort from the left arm to the right hand. Because of this, in
the push-off, the right arm of the athlete simply accompanies the pole.
The jumper does not succeed in pushing off.
In this portion of the jump Bubka has significant reserves for increasing
his technical mastery. At this point, it is not necessary for the jumper to
strive to end the jump faster than 1.27 sec. (See Table). What should follow
is to increase the duration of the interaction with the pole, by means of an
active push-off.
GOING OVER THE BAR
The jumper, in using compensatory movement of the body, maintains a high
speed of pelvic girdle movement (up to 3.0m/sec). As a consequence, when
going over the bar, the trajectory of movement of the jumper's body goes
over significantly higher than the height of the bar. Easy calculations which
can be carries out on the cinematogram show that on this try Bubka could
have gone over the bar at a height of 5.85-5.90!
NOTE: From the original author –
1986 up-date: Since 1983 Sergei Bubka has made sufficient improvements.
First of all his overall speed for the last six strides has improved from
9.56 m/sex to 9.84 m/sec. Second, his execution off the top of t
he pole has also improved.
Resultant Dynamics
Year................................Age......................Result
1984.................................20.......................5.94
1985.................................21.......................6.00
1986.................................22.......................6.01 ……………….
OVER THE BAR BY V. MANSVETOV
Re-printed and interpreted from, Legkaya Atletika,
12: 16-17, 1983
The best pole vaulter in the first Track and Field World Championships in 1983
was 19 year-old sportsman Sergei Bubka (5.70). The success of yesterday's
junior came about with a certain degree of uncertainty, even though the
dynamics of his results substantiates the long (10 years) and steady
(without deviations) increase in his sports mastery.
Result Dynamics
Year....................Age......................Result
1974....................10........................BG
1975....................11.......................2.70
1976....................12.......................3.50
1977....................13.......................3.60
1978....................14.......................4.40
1979....................15.......................4.80
1980....................16.......................5.10
1981....................17.......................5.40
1982....................18.......................5.55
1983....................19.......................5.72
This shows somewhat of a rejuvenation in this track and field event in
general and the need to have early specialization in this sport. And, most
important, as noted by the athletes coach, is to "pay special attention
to technical improvement, which is only possible by working closely with science."
The approach run of the athlete is 20 running steps. The jumper begins
the approach run from a stand, without any preliminary steps.
He carries the pole up high, with optimally placed hands (57cm/23") and
an extended position of the trunk. All steps in the second half of the
approach run are executed actively and from the front part of the foot.
The approach run has considerable acceleration.
On the last 15m segment before the take-off, speed achieves 9.5m/sec.
In the last 6 steps (exclusive of the pre-take-off) the athlete achieves a
relatively level tempo..
The pre-take-off stride is executed very quickly
and is gathered (shortened). Time of support last all of 0.082 sec. and
the flight 0.087 sec. With this, the jumper achieves a significant increase
in tempo on the last stride, 10.37m/ sec. Such an increase in tempo is
characteristic of record-setting jumpers (V Polyakov, 5.81m).
Fast execution of the pre-take-off stride of the approach run provides maintenance
of speed in the very take-off. It also allows for transfer of inertia from the approach
run to the entire "jumper-pole" system.
During the last two strides, the jumper uses both arms to move the pole to
the plant position. The take-off is executed through a firmly extended body,
which travels upward at an angle of 77-78. The foot steps on the projection
point of the grip (top hand). The transition from the approach run to height
on the pole is executed powerfully and quickly, in 0.11 sec.
By maintaining the accumulated speed of the approach run, the upper part of the
trunk is sent forward at take-off. Speed of movement of the shoulder joint (9.0m/sec)
is ahead of the movement of the pelvic girdle (8.0m/sec)
SUPPORT PHASE ON THE POLE, AND POLE FLEXION.
The high speed of the jumper's body movement at the end of the take-off
provides for a long execution of the hang-swing. It comprises 8.3% of the
time for the entire support portion of the jump, which is very important in
jump technique with a higher grip on a firm poles.
Such actions by the jumper serve to move the entire "jumper-pole" system forward.
We can also note a positive factor here in the nearing of the trajectory of the pole
movement (point of grip) with the horizontal. (this is seen in Figure 2)
Shown here, is the coefficient of the use of the elastic properties of the pole.
They reflect the degree of technical mastery of the jumper, especially at this point
of the jump. In Bubka, it is equal to 3.7 (the jumper uses the pole at 205 lbs. with
the grip at 4.99 and flexes it more than 1.40/33% according to the cord). It is
sufficient to say that only in Volkov during the time of the XXII Olympiad that this
coefficient was higher.
Thus, the action of the jumper, up to the moment of beginning pole extension, can be
considered highly technical (proper technique). The exception appears to be
the insufficient throwing of the body onto the spine/back.
POLE EXTENSION
The moment of the greatest flexion of the pole according to the time is
stretched out (.38 sec). The jumper continues to rotate backward with
simultaneous extension of the legs. The sighting of the jumper controls
the position of the legs relative to the pole. Extension is active but long
in time (29.7%). Effort vectors of the extending body and pole coincide.
Speed of lifting the trunk and legs upward are close to 6m/sec.
Figure…..2………………………………
.dj notes: I cannot put the Trajectory diagram here. What it shows is
one: take-off angle of an 18 degree hip trajectory….
Two: the top hand trajectory from frame 13 to 25..
Three: max bend of the pole.
Interesting to me was that the vaulter only went "up" 55cm during
the "pole bending" phase..(from plant to max bend/flat back)
ACTION ON THE EXTENDED POLE
When the jumper completes the transition (rock-back/extension) to support
on the pole, the pole is sharply and fully extended and the athlete, so to speak,
"loses it". As a consequence, at the beginning of the push-off the legs and
trunk are lowered and go far from the axis of the pole.
But the high speed of the lift (Table 1) allows the jumper to quickly go
through this situation. (Fast execution of coming out of support on the
pole is a regular occurrence in pole vaulters in their record tries).
A deficiency of Bubka here appears to be the lack of clear execution of
the transition of effort from the left arm to the right hand. Because of this, in
the push-off, the right arm of the athlete simply accompanies the pole.
The jumper does not succeed in pushing off.
In this portion of the jump Bubka has significant reserves for increasing
his technical mastery. At this point, it is not necessary for the jumper to
strive to end the jump faster than 1.27 sec. (See Table). What should follow
is to increase the duration of the interaction with the pole, by means of an
active push-off.
GOING OVER THE BAR
The jumper, in using compensatory movement of the body, maintains a high
speed of pelvic girdle movement (up to 3.0m/sec). As a consequence, when
going over the bar, the trajectory of movement of the jumper's body goes
over significantly higher than the height of the bar. Easy calculations which
can be carries out on the cinematogram show that on this try Bubka could
have gone over the bar at a height of 5.85-5.90!
NOTE: From the original author –
1986 up-date: Since 1983 Sergei Bubka has made sufficient improvements.
First of all his overall speed for the last six strides has improved from
9.56 m/sex to 9.84 m/sec. Second, his execution off the top of t
he pole has also improved.
Resultant Dynamics
Year................................Age......................Result
1984.................................20.......................5.94
1985.................................21.......................6.00
1986.................................22.......................6.01 ……………….