RE: VertiMax vs. Depth Jump Training

[Guest guest]

I just read this in the journal the other day and am

glad you brought it out in this forum. It most

definitely needs be be known for all those people who

use the Vertimax for jump training.

Chad Scheitel, MA, CSCS

Minneapolis, MN

--- carruthersjam wrote:

> The below may be of interest:

>

> The Effect of Short-Term VertiMax vs. Depth Jump

> Training on Vertical

> Jump Performance.

>

> Journal of Strength & Conditioning Research.

> 22(2):321-325, March

> 2008.

> McClenton, LaKeysha S; Brown, Lee E; Coburn,

> W; Kersey,

> D

> Abstract:

>

> The ability to generate lower body explosive power

> is considered an

> important factor in many athletic activities.

> Thirty-one men and

> women, recreationally trained volunteers, were

> randomly assigned to 3

> different groups (control, n = 10; VertiMax, n = 11;

> and depth jump,

> n = 10). A Vertec measuring device was used to test

> vertical jump

> height pre- and post-training. All subjects trained

> twice weekly for

> 6 weeks, performing approximately 140 jumps. The

> VertiMax group

> increased elastic resistance and decreased volume

> each week, while

> the depth jump group increased both box height and

> volume each week.

> The depth jump group significantly increased their

> vertical jump

> height (pre: 20.5 +/- 3.98; post: 22.65 +/- 4.09),

> while the VertiMax

> (pre: 22.18 +/- 4.31; post: 23.36 +/- 4.06) and

> control groups (pre:

> 15.65 +/- 4.51; post: 15.85 +/- 4.17) did not

> change.

>

> These findings suggest that, within the volume and

> intensity

> constraints of this study, depth jump training twice

> weekly for 6

> weeks is more beneficial than VertiMax jump training

> for increasing

> vertical jump height. Strength professionals should

> focus on depth

> jump exercises in the short term over commercially

> available devices

> to improve vertical jump performance.

>

> ======================

> Carruthers

> Wakefield, UK

>

>

[Guest guest]

,

Do you have any experience with or research that you know of that challenges the

duration of training for the vertical jump and what might be an optimal time for

peak height. I have had many experiences training myself and other atletes for

vertical jump height, and I have had great brief improvements of 3-5 inches in 2

weeks or less and then have had some athletes stay the same or decrease after

similiar training strategies but then improve when tested again 3-7 days later.

I suppose this is the essence of training in terms of testing is to get the

timing of training stimulus correct so that peak result can be obtained exaclty

when most needed and not too delayed. Any thoughts anyone on this topic.

Doug Fairbanks

ton, Sc

============================

To: Supertraining@...: Carruthersjam@...: Fri, 21 Mar

2008 17:19:24 +0000Subject: VertiMax vs. Depth Jump Training

The below may be of interest:The Effect of Short-Term VertiMax vs. Depth Jump

Training on Vertical Jump Performance. Journal of Strength & Conditioning

Research. 22(2):321-325, March 2008.McClenton, LaKeysha S; Brown, Lee E; Coburn,

W; Kersey, D Abstract: The ability to generate lower body explosive

power is considered an important factor in many athletic activities. Thirty-one

men and women, recreationally trained volunteers, were randomly assigned to 3

different groups (control, n = 10; VertiMax, n = 11; and depth jump, n = 10). A

Vertec measuring device was used to test vertical jump height pre- and

post-training. All subjects trained twice weekly for 6 weeks, performing

approximately 140 jumps. The VertiMax group increased elastic resistance and

decreased volume each week, while the depth jump group increased both box height

and volume each week. The depth jump group significantly increased their

vertical jump height (pre: 20.5 +/- 3.98; post: 22.65 +/- 4.09), while the

VertiMax (pre: 22.18 +/- 4.31; post: 23.36 +/- 4.06) and control groups (pre:

15.65 +/- 4.51; post: 15.85 +/- 4.17) did not change. These findings suggest

that, within the volume and intensity constraints of this study, depth jump

training twice weekly for 6 weeks is more beneficial than VertiMax jump training

for increasing vertical jump height. Strength professionals should focus on

depth jump exercises in the short term over commercially available devices to

improve vertical jump performance.======================

CarruthersWakefield, UK

[Guest guest]

Doesn't seem like a fair comparison since the vertimax group

increased intensity but reduced volume and the depth box jump group

increased depth and volume. I would like to see them have increased

volume and intensity on the vertimax group then compare the results.

owner of Personalized Fitness

Personal Trainer

San , Texas USA

>

> > The below may be of interest:

> >

> > The Effect of Short-Term VertiMax vs. Depth Jump

> > Training on Vertical

> > Jump Performance.

> >

> > Journal of Strength & Conditioning Research.

> > 22(2):321-325, March

> > 2008.

> > McClenton, LaKeysha S; Brown, Lee E; Coburn,

> > W; Kersey,

> > D

> > Abstract:

> >

> > The ability to generate lower body explosive power

> > is considered an

> > important factor in many athletic activities.

> > Thirty-one men and

> > women, recreationally trained volunteers, were

> > randomly assigned to 3

> > different groups (control, n = 10; VertiMax, n = 11;

> > and depth jump,

> > n = 10). A Vertec measuring device was used to test

> > vertical jump

> > height pre- and post-training. All subjects trained

> > twice weekly for

> > 6 weeks, performing approximately 140 jumps. The

> > VertiMax group

> > increased elastic resistance and decreased volume

> > each week, while

> > the depth jump group increased both box height and

> > volume each week.

> > The depth jump group significantly increased their

> > vertical jump

> > height (pre: 20.5 +/- 3.98; post: 22.65 +/- 4.09),

> > while the VertiMax

> > (pre: 22.18 +/- 4.31; post: 23.36 +/- 4.06) and

> > control groups (pre:

> > 15.65 +/- 4.51; post: 15.85 +/- 4.17) did not

> > change.

> >

> > These findings suggest that, within the volume and

> > intensity

> > constraints of this study, depth jump training twice

> > weekly for 6

> > weeks is more beneficial than VertiMax jump training

> > for increasing

> > vertical jump height. Strength professionals should

> > focus on depth

> > jump exercises in the short term over commercially

> > available devices

> > to improve vertical jump performance.

> >

> > ======================

> > Carruthers

> > Wakefield, UK

> >

> >

>

[Guest guest]

We were looking to find out what are the differences in force plate data when

comparing jumping with Vertimax, weight vest or no resistance. In this pilot we

were not looking for the optimal training load.

Our test results of another short pilot with a force plate (sample frequency 100

Hz) show that during bouncing without extra resistance (NO, 82,3 kg), weight

vest (W, 96,5 kg), and Vertimax (V, 96,4 kg) the RFD is highest during Vertimax

(mean max RFD = 161 kN/sec) and lowest during Weight vest bouncing (110 kN/sec),

no resistance (134 kN/sec). Contact time during Vertimax (15 ms) and no

resistance (16 ms) were comparable, while it was longer during weight vest (19

ms). A repeated test showed comparable results.

Earlier tests have shown that the jumping time (time from start of movement up

to lift off) during CMJ did not elongate when using Vertimax, but was longer

during weight vest jumping, as compared to jumping without extra resistance. A

first short test comparing data before and after Vertimax or weight vest CMJ

show the same effects, but this needs to be studied more thoroughly.

Mr. Kraaijenhof has tried many things to improve performance using all kinds of

devices. According to his statement their Vertimax-like system increased contact

time and decreased power output (?) ... certainly it could be their equipment,

or the quality of training that brought about their poor results. Maybe mr

Kraaijenhof wants to share his research with the Supertraining members so his

setup can be studied.

Unfortunately the online JSCR magazine cannot be downloaded because the link has

temporarily been shut down by the publisher, so I cannot read the Vertimax

publication yet.

Huizing

Enschede, The Netherlands

Re: VertiMax vs. Depth Jump Training

As a sprint coach I tried basically everything to improve explosive

strength (read jumping power).

In an early stage I tried jumping with elastic resistance like the

Vertimax but also assisted elastic training, as well as drop jumps,

jumping with barbells and weightvest, but also hypergravity training

according to Bosco.

My big problem the Vertimax-system is the tremendous changes in

contact time, with teaches the athlete to change the rate of force

development!

One of my pupils (national recordholder 60 metres-still) gave a lecture in

1994 already for the Dutch Olympic Comittee and presented our research.

Typically one sees a decrease in power output, not what I am looking for,

but maybe somebody else is.....

Mr. Huizing's use of a weight vest of 10 kg is asking for trouble, a

weight vest should weigh more than 10-13% of the bodyweight of the

athlete! It shows that reading research only is a scary thing to do if one

wants to improve athletes performances. Working with elite answers many of

these questions. Drop jumping can be a very safe way of training when

performed with the right athlete (not with juniors), from the right drop

height, in the right dosage (very few 100% jumps-measure each jumping

height for monitoring this!)and for the right reason (only for high level

athletes which have very few other options left) and with the right

technique (like anything else).

=============================

[Guest guest]

Must be bad science or good Vertimax promotion at work, and probably both!

Before doubting other people's work, always first re-evaluate one's own.

E.g. read below:

Recorded contact times of 15 ms, 16 ms and 19 ms!!?? Pretty fast contact

times I should say. Anyone else with experience recording contact times or

data from literature, or the measuring equipment was bad or miracle

happened.

Henk Kraaijenhof

Amstelveen

Holland

We were looking to find out what are the differences in force plate data

> when comparing jumping with Vertimax, weight vest or no resistance. In

> this pilot we were not looking for the optimal training load.

>

> Our test results of another short pilot with a force plate (sample

> frequency 100 Hz) show that during bouncing without extra resistance (NO,

> 82,3 kg), weight vest (W, 96,5 kg), and Vertimax (V, 96,4 kg) the RFD is

> highest during Vertimax (mean max RFD = 161 kN/sec) and lowest during

> Weight vest bouncing (110 kN/sec), no resistance (134 kN/sec). Contact

> time during Vertimax (15 ms) and no resistance (16 ms) were comparable,

> while it was longer during weight vest (19 ms). A repeated test showed

> comparable results.

>

> Earlier tests have shown that the jumping time (time from start of

> movement up to lift off) during CMJ did not elongate when using Vertimax,

> but was longer during weight vest jumping, as compared to jumping without

> extra resistance. A first short test comparing data before and after

> Vertimax or weight vest CMJ show the same effects, but this needs to be

> studied more thoroughly.

>

> Mr. Kraaijenhof has tried many things to improve performance using all

> kinds of devices. According to his statement their Vertimax-like system

> increased contact time and decreased power output (?) ... certainly it

> could be their equipment, or the quality of training that brought about

> their poor results. Maybe mr Kraaijenhof wants to share his research with

> the Supertraining members so his setup can be studied.

>

> Unfortunately the online JSCR magazine cannot be downloaded because the

> link has temporarily been shut down by the publisher, so I cannot read the

> Vertimax publication yet.

>

>

> Huizing

> Enschede, The Netherlands

>

>

> Re: VertiMax vs. Depth Jump Training

>

> As a sprint coach I tried basically everything to improve explosive

> strength (read jumping power).

> In an early stage I tried jumping with elastic resistance like the

> Vertimax but also assisted elastic training, as well as drop jumps,

> jumping with barbells and weightvest, but also hypergravity training

> according to Bosco.

> My big problem the Vertimax-system is the tremendous changes in

> contact time, with teaches the athlete to change the rate of force

> development!

> One of my pupils (national recordholder 60 metres-still) gave a lecture in

> 1994 already for the Dutch Olympic Comittee and presented our research.

> Typically one sees a decrease in power output, not what I am looking for,

> but maybe somebody else is.....

> Mr. Huizing's use of a weight vest of 10 kg is asking for trouble, a

> weight vest should weigh more than 10-13% of the bodyweight of the

> athlete! It shows that reading research only is a scary thing to do if one

> wants to improve athletes performances. Working with elite answers many of

> these questions. Drop jumping can be a very safe way of training when

> performed with the right athlete (not with juniors), from the right drop

> height, in the right dosage (very few 100% jumps-measure each jumping

> height for monitoring this!)and for the right reason (only for high level

> athletes which have very few other options left) and with the right

> technique (like anything else).

>

> =============================

>

[Guest guest]

Thank you for the correction, of course it should be 150, 160 and 190 ms.

Furthermore it does not change the other information.

Huizing

Enschede, The Netherlands

Re: VertiMax vs. Depth Jump Training

>

> As a sprint coach I tried basically everything to improve explosive

> strength (read jumping power).

> In an early stage I tried jumping with elastic resistance like the

> Vertimax but also assisted elastic training, as well as drop jumps,

> jumping with barbells and weightvest, but also hypergravity training

> according to Bosco.

> My big problem the Vertimax-system is the tremendous changes in

> contact time, with teaches the athlete to change the rate of force

> development!

> One of my pupils (national recordholder 60 metres-still) gave a lecture in

> 1994 already for the Dutch Olympic Comittee and presented our research.

> Typically one sees a decrease in power output, not what I am looking for,

> but maybe somebody else is.....

> Mr. Huizing's use of a weight vest of 10 kg is asking for trouble, a

> weight vest should weigh more than 10-13% of the bodyweight of the

> athlete! It shows that reading research only is a scary thing to do if one

> wants to improve athletes performances. Working with elite answers many of

> these questions. Drop jumping can be a very safe way of training when

> performed with the right athlete (not with juniors), from the right drop

> height, in the right dosage (very few 100% jumps-measure each jumping

> height for monitoring this!)and for the right reason (only for high level

> athletes which have very few other options left) and with the right

> technique (like anything else).

>

> ============ ========= ========

>

[Guest guest]

The studies I referred to some time ago are now published in the latest J.

Strength and Cond. Research, from pubmed:

1: J Strength Cond Res. 2008 Apr 15 [Epub ahead of print]

 

    An Examination of Training on the VertiMax Resisted Jumping Device for

Improvements in Lower Body Power in Highly Trained College Athletes.

Rhea MR, MD, Oliverson JR, Ayllón FN, J Potenziano B.

Training to develop superior muscular power has become a key component to most

progressive sport conditioning programs. Conventional resistance training,

plyometrics, and speed/agility modalities have all been employed in an effort to

realize superlative combinations of training stimuli. New training devices such

as the VertiMax resisted jump trainer are marketed as a means of improving lower

body reactive power. The purpose of this study was to evaluate the effectiveness

of the VertiMax, in combination with traditional training modalities, for

improvements in lower body power among highly trained athletes. Forty men and

women Division I collegiate athletes representing the sports of baseball,

basketball, soccer, gymnastics, and track completed a 12-week mixed-methods

training program. Two groups were constructed with both groups performing the

same conventional resistance training and strength training exercises.

The training control group performed

traditional plyometric exercises while the experimental group performed similar

loaded jump training on the VertiMax. Lower body power was measured before and

after the training program by the TENDO FiTROdyne Powerlizer and statistically

compared for differences between groups. Data analyses identified a significant

(p < 0.05) and meaningful difference between power development among the 2

groups, with the VertiMax eliciting a greater treatment effect (effect size =

0.54) over conventional resistance and plyometric training alone (effect size =

0.09).

**These data convincingly demonstrate that the VertiMax represents an effective

strategy for developing lower body power among trained college athletes, when

combined with traditional strength and conditioning approaches.**

======================

 The Effectiveness of Resisted Jump Training on the VertiMax in High School

Athletes.

2: J Strength Cond

Res. 2008 Apr 15 [Epub ahead of print]

Rhea MR, MD, Lunt KT, Ayllón FN.

Resisted jumping devices and resisted plyometric training have become more

common in recent years. The effectiveness of such training has yet to be

determined among high school athletes. Sixty-four high school athletes (50 boys

and 14 girls) from a variety of sports were divided into 2 groups and

participated in a training intervention that differed only by the use of the

VertiMax jump trainer in 1 group. Lower-body power was tested before and after

the intervention and compared statistically for differences between the groups.

Athletes from both groups followed a periodized training program with resistance

exercises performed 2 or 3 days per week, and sprint and plyometric training

(i.e., training control group) or sprint, plyometric, and VertiMax training

(i.e., VertiMax group) 1 or 2 days per week, for 12 total weeks.

In addition to the traditional compound lower-body lifts and equated sprint

work, the VertiMax group performed supplementary exercises

on the VertiMax training apparatus. The average improvement in power observed

in the training control group was 49.50 +/- 97.83 W, and the increase in power

in the VertiMax group was 217.14 +/- 99.21 W. The differences in power after the

test and improvements in power with training were found to differ between the

groups (P < 0.05) and favored the VertiMax training group.

**Combined with previous research with college athletes, these data show the

added effectiveness of resisted jump training on the VertiMax among athletes for

the development of lower-body power.

====================

Commenting on the previous study by McClenton et al I was surprised by their

choice of such low resistance (15 lb) and regressing jump amount, whil in

contrast the plyometric group increased in both heigth and amount of jumps

during the progression of the training.

Kind regards,

Drs. Huizing

The Netherlands

VertiMax vs. Depth Jump Training

The below may be of interest:

The Effect of Short-Term VertiMax vs. Depth Jump Training on Vertical

Jump Performance.

Journal of Strength & Conditioning Research. 22(2):321-325, March

2008.

McClenton, LaKeysha S; Brown, Lee E; Coburn, W; Kersey,

D

Abstract:

The ability to generate lower body explosive power is considered an

important factor in many athletic activities. Thirty-one men and

women, recreationally trained volunteers, were randomly assigned to 3

different groups (control, n = 10; VertiMax, n = 11; and depth jump,

n = 10). A Vertec measuring device was used to test vertical jump

height pre- and post-training. All subjects trained twice weekly for

6 weeks, performing approximately 140 jumps. The VertiMax group

increased elastic resistance and decreased volume each week, while

the depth jump group increased both box height and volume each week.

The depth jump group significantly increased their vertical jump

height (pre: 20.5 +/- 3.98; post: 22.65 +/- 4.09), while the VertiMax

(pre: 22.18 +/- 4.31; post: 23.36 +/- 4.06) and control groups (pre:

15.65 +/- 4.51; post: 15.85 +/- 4.17) did not change.

These findings suggest that, within the volume and intensity

constraints of this study, depth jump training twice weekly for 6

weeks is more beneficial than VertiMax jump training for increasing

vertical jump height. Strength professionals should focus on depth

jump exercises in the short term over commercially available devices

to improve vertical jump performance.

============ ========= =

[Guest guest]

,

Still trying to sort through the study results. I frankly wasn't too impressed

with the VertiMax and I've been training athletes fro vertical jump for many

years.

What I'm really having a hard time understanding is how you manage to get your

copy of J Strength Cond Res. so much faster than I do and I'm in San Diego.

W.G.

Ubermensch Sports Consultancy

San DIego, CA

Huizing wrote: The

studies I referred to some time ago are now published in the latest J. Strength

and Cond. Research, from pubmed:

1: J Strength Cond Res. 2008 Apr 15 [Epub ahead of print]

An Examination of Training on the VertiMax Resisted Jumping Device for

Improvements in Lower Body Power in Highly Trained College Athletes.

Rhea MR, MD, Oliverson JR, Ayllón FN, J Potenziano B.

Training to develop superior muscular power has become a key component to most

progressive sport conditioning programs. Conventional resistance training,

plyometrics, and speed/agility modalities have all been employed in an effort to

realize superlative combinations of training stimuli. New training devices such

as the VertiMax resisted jump trainer are marketed as a means of improving lower

body reactive power. The purpose of this study was to evaluate the effectiveness

of the VertiMax, in combination with traditional training modalities, for

improvements in lower body power among highly trained athletes. Forty men and

women Division I collegiate athletes representing the sports of baseball,

basketball, soccer, gymnastics, and track completed a 12-week mixed-methods

training program. Two groups were constructed with both groups performing the

same conventional resistance training and strength training exercises.

The training control group performed

traditional plyometric exercises while the experimental group performed

similar loaded jump training on the VertiMax. Lower body power was measured

before and after the training program by the TENDO FiTROdyne Powerlizer and

statistically compared for differences between groups. Data analyses identified

a significant (p < 0.05) and meaningful difference between power development

among the 2 groups, with the VertiMax eliciting a greater treatment effect

(effect size = 0.54) over conventional resistance and plyometric training alone

(effect size = 0.09).

**These data convincingly demonstrate that the VertiMax represents an effective

strategy for developing lower body power among trained college athletes, when

combined with traditional strength and conditioning approaches.**

======================

The Effectiveness of Resisted Jump Training on the VertiMax in High School

Athletes.

2: J Strength Cond

Res. 2008 Apr 15 [Epub ahead of print]

Rhea MR, MD, Lunt KT, Ayllón FN.

Resisted jumping devices and resisted plyometric training have become more

common in recent years. The effectiveness of such training has yet to be

determined among high school athletes. Sixty-four high school athletes (50 boys

and 14 girls) from a variety of sports were divided into 2 groups and

participated in a training intervention that differed only by the use of the

VertiMax jump trainer in 1 group. Lower-body power was tested before and after

the intervention and compared statistically for differences between the groups.

Athletes from both groups followed a periodized training program with resistance

exercises performed 2 or 3 days per week, and sprint and plyometric training

(i.e., training control group) or sprint, plyometric, and VertiMax training

(i.e., VertiMax group) 1 or 2 days per week, for 12 total weeks.

In addition to the traditional compound lower-body lifts and equated sprint

work, the VertiMax group performed supplementary exercises

on the VertiMax training apparatus. The average improvement in power observed

in the training control group was 49.50 +/- 97.83 W, and the increase in power

in the VertiMax group was 217.14 +/- 99.21 W. The differences in power after the

test and improvements in power with training were found to differ between the

groups (P < 0.05) and favored the VertiMax training group.

**Combined with previous research with college athletes, these data show the

added effectiveness of resisted jump training on the VertiMax among athletes for

the development of lower-body power.

====================

Commenting on the previous study by McClenton et al I was surprised by their

choice of such low resistance (15 lb) and regressing jump amount, whil in

contrast the plyometric group increased in both heigth and amount of jumps

during the progression of the training.

=========================