Adarq.org

so my training is not going to have any heavy barbell lifts.. just bw/dumbell stuff.. so my dunking might get worse, or better.. im assuming better, bekoz im basically doing all impulse/explosive training.

anyway, after a week of doing it, my jumping coordination felt all off.. i just felt weird.. i might be having squat withdrawl though..

i busted out the camcorder after 15 dribbling up dunk attempts.. so i was somewhat fatigued.. ~36 " or so on this dunk.. you can see all the damn sweat on me.. anyway, jumped pretty good on my dribble ups, just slammed them all in and every one flew out.. whatever i'll keep practicing

going to put my vids on vimeo koz i dont wanna just put a bunch of b.s. on my youtube.... SCRATCH THAT -> VIMEO SUCKS.. just made a adarquimiscfootage youtube hah

<a href="http://www.youtube.com/watch?v=A0DeoG4oIls" target="_blank">http://www.youtube.com/watch?v=A0DeoG4oIls</a>


6/8/2009

- 15 dribble up dunk attempts
- then 3 self lob dunk attempts

- here's a self lob pic:

thank you very much my friend... putting it in the OP now

I really need to get an EMS when i start making some money again... thats one thing I would love to experiment with..

peace

i will do that one day.. i could just cp my emoticons over once a week for fun.. then cp the originals back.

hah

Respect. You are your own guinea pig/ lab rat. 

I would be interested in the results from this. I need to work on lower leg strength, stiffness etc too. Since it would not involve much bending of the knees, I should be able to start some training right away.

hehe.. too often am I my own guinea pig



6/7/2009

hamstrings/adductors/glutes are ridiculously sore..

hope i feel good by tmw morning.. doing some dunks, then doing my workout project with eddie at night..

peace

Physical performance responses during 72 h of military operational stress.

APPLIED SCIENCES
Medicine & Science in Sports & Exercise. 34(11):1814-1822, November 2002.
NINDL, BRADLEY C.; LEONE, CARA D.; J. THARION, WILLIAM; JOHNSON, RICHARD F.; W. CASTELLANI, JOHN; PATTON, JOHN F.; MONTAIN, SCOTT J.

Abstract:
NINDL, B. C., C. D. LEONE, W. THARION, R. F. JOHNSON, J. CASTELLANI, J. F. PATTON, and S. J. MONTAIN. Physical performance responses during 72 h of military operational stress. Med. Sci. Sports Exerc., Vol. 34, No. 11, pp. 1814-1822, 2002.

Purpose: To characterize the impact of prolonged work, underfeeding, and sleep deprivation (i.e., sustained operations; SUSOPS) on physical and occupational related performance during military operational stress.

Methods: Ten male soldiers were tested on days 1 (D1), 3 (D3), and 4 (D4) of a control and an experimental week that included prolonged physical work (total daily energy expenditure ~4500 kcal[middle dot]d-1), underfeeding (~1600 kcal[middle dot]d-1), and sleep deprivation (~2 h[middle dot]d-1). Body composition was measured with dual-energy x-ray absorptiometry (DEXA). Ballistic power was assessed by 30 repetitive squat jumps and bench-press throws. Military-relevant occupational performance was evaluated with a 10-min box lift, obstacle course, grenade throw, rifle marksmanship, and a 25-min wall-build task.

Results: Fat-free mass (-2.3%) and fat mass (-7.3%) declined (P <= 0.05) during SUSOPS. Squat-jump mean power (-9%) and total work (-15%) declined (P <= 0.05) during SUSOPS. Bench-press power output, grenade throw, and marksmanship for pop-up targets were not affected. Obstacle course and box-lift performances were lower (P <= 0.05) on D3 but showed some recovery on D4. Wall building was ~25% lower (P <= 0.05) during SUSOPS.

Conclusion: Decrements in performance during SUSOPS are primarily restricted to tasks that recruit muscles that are over-utilized without adequate recovery. General military skill tasks and occupational physical performance tasks are fairly well maintained.

he bends at the back much more than you also, but quickly "straightens up"

id say that + the big lead in step are the major differences between his your "tehnical" part of plant

he looks waaay more explosive and has a visually noticeable lower gct :p

ya i mentioned the back thing as "chest forward"... could be activating his hamstrings more or allowing him to really load those ankles..

his gct is only slightly less than mine.. which is still very significant..

peace

Fatigue, Vertical Leg Stiffness, and Stiffness Control Strategies in Males and Females

 Context: Fatigue appears to influence musculoskeletal injury rates during athletic activities, but whether males and females respond differently to fatigue is unknown.
Objective: To determine the influence of fatigue on vertical leg stiffness (K VERT) and muscle activation and joint movement strategies and whether healthy males and females respond similarly to fatigue.
Design: Repeated-measures design with all data collected during a single laboratory session.
Setting: Laboratory.
Patients or Other Participants: Physically active males (n = 11) and females (n = 10).
Intervention(s): Subjects performed hopping protocols at 2 frequencies before and after fatigue, which was induced by repeated squatting at submaximal loads.
Main Outcome Measure(s): We measured K VERT with a forceplate and peak muscle activity of the quadriceps, hamstrings, gastrocnemius, soleus, and anterior tibialis muscles with surface electromyography. Sagittal-plane kinematics at the knee and ankle were recorded with an electrogoniometer.
Results: After fatigue, K VERT was unchanged for all subjects. However, both males and females demonstrated reduced peak hamstrings ( P = .002) and anterior tibialis ( P = .001) activation, coupled with increased gastrocnemius ( P = .005) and soleus ( P = .001) peak activity, as well as increased quadriceps-hamstrings ( P = .005) and gastrocnemius/soleus-anterior tibialis coactivation ratios ( P = .03) after fatigue. Overall, females demonstrated greater quadriceps-hamstrings coactivation ratios than males, regardless of the fatigue condition ( P = .026). Only females showed increased knee flexion at initial contact after fatigue during hopping ( P = .03).
Conclusions: Although K VERT was unaffected, the peak muscle activation and joint movement strategies used to modulate K VERT were affected after fatigue. Once fatigued, both males and females used an ankle-dominant strategy, with greater reliance on the ankle musculature and less on the knee musculature. Also, once fatigued, all subjects used an antagonist inhibition strategy by minimizing antagonist coactivation. Overall, females used a more quadriceps-dominant strategy than males, showing greater quadriceps activity and a larger quadriceps-hamstrings coactivation ratio. Changes in muscle activation and coactivation ratios because of fatigue and sex are suggested to alter knee joint stability and increase anterior cruciate ligament injury risk.







Motor programming during practice conditions high and low in contextual interference.

Random practice has been reported to demand greater time for movement preparation during acquisition than blocked practice. The present study revealed that this could be attributed to a more complete engagement of the motor programming process during random practice. This cost, however, was localized to the motor programming subprocess that S. T. Klapp (1995) associated with organizing the internal structure of a movement chunk rather than an alternative subprocess responsible for organizing movement chunks into the correct serial order. The more thorough employment of motor programming during acquisition by random practice participants resulted in a more efficient use of this planning operation during retention, as well as more accurate movement reproduction. These data support the claim that practice conditions high in contextual interference support improvements in both movement preparation and memory strength. (PsycINFO Database Record (c) 2008 APA, all rights reserved)





Effect of sex hormones on neuromuscular control patterns during landing

The purpose of the study was to investigate the effects of sex hormones across menstrual cycle phases on lower extremity neuromuscular control patterns during the landing phase of a drop jump. A repeated-measures design was utilized to examine sex hormone effects in 26 recreationally active eumenorrheic women. Varus/valgus knee angle and EMG activity from six lower extremity muscles were recorded during three drop jumps from a 50cm platform in each phase of the menstrual cycle. Blood assays verified sex hormone levels and cycle phase. The semitendinosus muscle exhibited onset delays (p?0.006) relative to ground contact during the luteal phase, and demonstrated a significant (p?0.05) difference between early and late follicular phases. Muscle timing differences between the gluteus maximus and semitendinosus were decreased (p?0.05) in the luteal compared to early follicular phases. These results suggest a different co-contractive behavior between the gluteus maximus and semitendinosus, signifying a shift in neuromuscular control patterns. It appears that female recreational athletes utilize a different neuromuscular control pattern for performing a drop jump sequence when estrogen levels are high (luteal phase) compared to when they are low (early follicular phase).

Of course there could be a million studies in here.. There are some other VJ studies in the other topics, but regardless, any study related to vertical jump can be put in here.



1. The influence of squat depth on maximal vertical jump performance

Because jumping from a deep squat is rarely practised, it is unlikely that these jumps were optimally coordinated by the participants. Differences in experimental vertical ground reaction force patterns also suggest that jumps from a deep squat are not optimally coordinated. These results suggest there is the potential for athletes to increase jump performance by exploiting a greater range of motion.

2. Effects of ballistic training on preseason preparation of elite volleyball players.

The treatment group produced a significant increase in both SJR (STANDING JUMP) and AJR (APPROACH JUMP) of 5.9 +/- 3.1% and 6.3 +/- 5.1%, respectively. These increases were significantly greater than the pre- to postchanges produced by the control group, which were not significant for either jump. Analysis of the data from the various other jump tests suggested increased overall force output during jumping, and in particular increased rate of force development were the main contributors to the increased jump height.

Conclusions: These results lend support to the effectiveness of ballistic resistance training for improving vertical jump performance in elite jump athletes.

3. INFLUENCE OF TRAINING BACKGROUND ON JUMPING HEIGHT

The power-trained
group jumped significantly higher (p
0.05) than the BB and
PA groups (0.40
0.05, 0.31
0.04, and 0.30
0.05, respec-
tively). The difference in jumping height was not produced by
higher rates of force development (RFD) and shorter center of
mass (CM) displacement. Instead, the PT group had greater CM
excursion (p
0.05) than the other groups. The PT and BB
groups had a high correlation between jumping height and 1RM
test (r
0.93 and r
0.89, p
0.05, respectively). In conclusion,
maximum strength seems to be important for jumping height,
but RFD does not seem relevant to achieve maximum jumping
heights. High RFD jumps should be performed during training
only when sport skills have a time constraint for force applica-
tion