scholarly journals The effect of 6 week nordic hamstring exercise on sprint and jumping performance

2021 ◽  
Author(s):  
Mehmet GÜLÜ ◽  
Ali Ahmet DOĞAN
Keyword(s):  
Jumping Performance

scholarly journals Morphological determinants of jumping performance in the Iberian green frog

2019 ◽  
Vol 66 (4) ◽  
pp. 417-424
Author(s):  
Gregorio Moreno-Rueda ◽  
Abelardo Requena-Blanco ◽  
Francisco J Zamora-Camacho ◽  
Mar Comas ◽  
Guillem Pascual
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Fluctuating Asymmetry ◽  
Hind Limb ◽  
Limb Length ◽  
Age Classes ◽  
Jumping Performance ◽  
Hind Limbs ◽  
Selective Forces ◽  
Pelophylax Perezi

Abstract Predation is one of the main selective forces in nature, frequently selecting potential prey for developing escape strategies. Escape ability is typically influenced by several morphological parameters, such as morphology of the locomotor appendices, muscular capacity, body mass, or fluctuating asymmetry, and may differ between sexes and age classes. In this study, we tested the relationship among these variables and jumping performance in 712 Iberian green frogs Pelophylax perezi from an urban population. The results suggest that the main determinant of jumping capacity was body size (explaining 48% of variance). Larger frogs jumped farther, but jumping performance reached an asymptote for the largest frogs. Once controlled by structural body size, the heaviest frogs jumped shorter distances, suggesting a trade-off between fat storage and jumping performance. Relative hind limb length also determined a small but significant percentage of variance (2.4%) in jumping performance—that is, the longer the hind limbs, the greater the jumping capacity. Juveniles had relatively shorter and less muscular hind limbs than adults (for a given body size), and their jumping performance was poorer. In our study population, the hind limbs of the frogs were very symmetrical, and we found no effect of fluctuating asymmetry on jumping performance. Therefore, our study provides evidence that jumping performance in frogs is not only affected by body size, but also by body mass and hind limb length, and differ between age classes.

GENDER BIAS IN THE EFFECTS OF ARMS AND COUNTERMOVEMENT ON JUMPING PERFORMANCE

2007 ◽  
Vol 21 (2) ◽  
pp. 362-366 ◽  
Author(s):  
MARK S. WALSH ◽  
HARALD BÖHM ◽  
MICHELLE M. BUTTERFIELD ◽  
JABAKAR SANTHOSAM
Keyword(s):  
Gender Bias ◽  
Jumping Performance

scholarly journals Population‐specific effects of developmental temperature on body condition and jumping performance of a widespread E uropean frog

2016 ◽  
Vol 6 (10) ◽  
pp. 3115-3128 ◽  
Author(s):  
Sanja Drakulić ◽  
Heike Feldhaar ◽  
Duje Lisičić ◽  
Mia Mioč ◽  
Ivan Cizelj ◽  
...  
Keyword(s):  
Body Condition ◽  
Developmental Temperature ◽  
Jumping Performance ◽  
Specific Effects

Effects on Performance of Variable Eccentric Loads during Depth Jumps

1995 ◽  
Vol 4 (1) ◽  
pp. 31-41 ◽  
Author(s):  
James C. Radcliffe ◽  
Louis R. Osternig
Keyword(s):  
Body Weight ◽  
Small Proportion ◽  
Small Amplitude ◽  
Vertical Jump ◽  
Considerable Variability ◽  
Large Depth ◽  
Jumping Performance ◽  
Squat Exercise ◽  
Healing Tissue ◽  
Extreme Care

Seventy subjects were tested for (a) percent body weight controlled (lowered and raised) by the lower extremities via parallel squat exercise, (b) maximum vertical jump-reach, and (c) maximal depth jump-reach from six heights ranging from 0.30 to 1.05 m. The results suggest that maximum parallel squat performance represents a small proportion (8%) of the variance contributing to controlling increasing depth jump heights and that specific improvement in jumping performance may be achieved by relatively small amplitude prestretch movements rather than large depth jump heights. The implications of the present findings for the use of depth jumping in conditioning and rehabilitative protocols are that (a) extreme care must be exercised in selecting jump heights, as there is considerable variability in individual tolerance to a given height, and (b) depth jumping should be contraindicated in cases where high impulse loads can disrupt healing tissue and, if it is used in postinjury situations, should be reserved for the end phase of rehabilitation.

The Effect of Dropping Height on Jumping Performance in Trained and Untrained Prepubertal Boys and Girls

2012 ◽  
Vol 26 (8) ◽  
pp. 2258-2264 ◽  
Author(s):  
Eleni I. Bassa ◽  
Dimitrios A. Patikas ◽  
Aikaterini I. Panagiotidou ◽  
Sophia D. Papadopoulou ◽  
Theofilos C. Pylianidis ◽  
...  
Keyword(s):  
Jumping Performance ◽  
Prepubertal Boys

Muscle function during jumping in frogs. I. Sarcomere length change, EMG pattern, and jumping performance

1996 ◽  
Vol 271 (2) ◽  
pp. C563-C570 ◽  
Author(s):  
G. J. Lutz ◽  
L. C. Rome
Keyword(s):  
Mechanical Properties ◽  
Muscle Function ◽  
Length Change ◽  
Operating Conditions ◽  
Mechanical Power ◽  
Shortening Velocity ◽  
Jumping Performance ◽  
Angular Velocities ◽  
High Level

We determined the influence of temperature on muscle function during jumping to better understand how the frog muscular system is designed to generate a high level of mechanical power. Maximal jumping performance and the in vivo operating conditions of the semimembranosus muscle (SM), a hip extensor, were measured and related to the mechanical properties of the isolated SM in the accompanying paper [Muscle function during jumping in frogs. II. Mechanical properties of muscle: implication for system design. Am. J. Physiol. 271 (Cell Physiol. 40): C571-C578, 1996]. Reducing temperature from 25 to 15 degrees C caused a 1.75-fold decline in peak mechanical power generation and a proportional decline in aerial jump distance. The hip and knee joint excursions were nearly the same at both temperatures. Accordingly, sarcomeres shortened over the same range (2.4 to 1.9 microns) at both temperatures, corresponding to myofilament overlap at least 90% of maximal. At the low temperature, however, movements were made more slowly. Angular velocities were 1.2- to 1.4-fold lower, and ground contact time was increased by 1.33-fold at 15 degrees C. Average shortening velocity of the SM was only 1.2-fold lower at 15 degrees C than at 25 degrees C. The low Q10 of velocity is in agreement with that predicted for muscles shortening against an inertial load.

scholarly journals The great leap backward: changes in the jumping performance of Australian children aged 11−12-years between 1985 and 2015

2018 ◽  
Vol 37 (7) ◽  
pp. 748-754 ◽  
Author(s):  
Brooklyn J. Fraser ◽  
Leigh Blizzard ◽  
Grant R. Tomkinson ◽  
Kate Lycett ◽  
Melissa Wake ◽  
...  
Keyword(s):  
Jumping Performance ◽  
Great Leap

Scaling of Jumping Performance in Anuran Amphibians

2000 ◽  
Vol 34 (2) ◽  
pp. 222 ◽  
Author(s):  
In-Ho Choi ◽  
Jae Han Shim ◽  
Youn Sun Lee ◽  
Robert E. Ricklefs
Keyword(s):  
Jumping Performance ◽  
Anuran Amphibians

SSC fatigue: Interaction between changes in joint stiffness and jumping performance

1994 ◽  
Vol 27 (6) ◽  
pp. 730
Author(s):  
Tomoki Horita ◽  
Paavo V. Komi ◽  
Caroline Nicol ◽  
Heikki Kyröläinen ◽  
Timo E.S. Takala
Keyword(s):  
Joint Stiffness ◽  
Jumping Performance
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