Stretch-shortening cycle characteristics during vertical jumps carried out with small and large range of motion

Kopper, Bence; Csende, Zsolt; Trzaskoma, Łukasz; Tihanyi, József

doi:10.1016/j.jelekin.2014.01.001

Cited by 17 publications

(18 citation statements)

References 25 publications

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“…As discussed previously, muscle fibers do not necessarily lengthen during the downward phase of the countermovement (46,50). Therefore, even if the angular joint velocities are high enough to evoke a stretch reflex, the reflex may not be evoked if there is no lengthening of the muscle fibers.…”

Section: Stretch Reflexmentioning

confidence: 91%

“…Although some studies indeed show that the fascicles lengthen during the downward phase of a CMJ, this lengthening is mostly passive and occurs primarily, but not exclusively in monoarticular muscles (28)(29)(30). Furthermore, studies also show a shortening of fascicles (28,50) or suggest an isometric action of the contractile element during the downward phase of a CMJ (45,46). Therefore, there is usually no active lengthening (i.e., eccentric action) of the fascicles during the downward movement of the CMJ.…”

Section: Jump and Squat Jumpmentioning

confidence: 99%

“…Therefore, there is usually no active lengthening (i.e., eccentric action) of the fascicles during the downward movement of the CMJ. The fascicles may passively lengthen only during slowly executed, submaximal, and large-amplitude (i.e., deep countermovement) CMJs, thereby dissipating energy, whereas they remain isometrically or concentrically contracted during faster, maximum effort, and small-amplitude jumps (45,46,68). Hence, it can be recommended that future research refers to the downward and upward phases rather than to the eccentric and concentric phases of a CMJ and avoids the use of terminology that refers to an eccentric phase (e.g., eccentric utilization ratio).…”

Section: Jump and Squat Jumpmentioning

confidence: 99%

“…It is thought that residual force enhancement also occurs during a CMJ, and it could therefore partially explain the superior acute performance during a CMJ. However, the contribution of residual force enhancement to an enhanced force production during a CMJ is likely minimal because the muscle fibers may only lengthen during slow large-amplitude CMJs (45,46,68) while remaining isometric (45,46) or contracting concentrically (50) during fast and small-amplitude CMJs. In addition, when muscle fibers lengthen during the downward phase, it is usually passive lengthening (28)(29)(30).…”

Section: Residual Force Enhancementmentioning

confidence: 99%

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The Difference Between Countermovement and Squat Jump Performances: A Review of Underlying Mechanisms With Practical Applications

Hooren¹,

Zolotarjova

2017

Journal of Strength and Conditioning Research

174

127

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Van Hooren, B and Zolotarjova, J. The difference between countermovement and squat jump performances: a review of underlying mechanisms with practical applications. J Strength Cond Res 31(7): 2011-2020, 2017-Two movements that are widely used to monitor athletic performance are the countermovement jump (CMJ) and squat jump (SJ). Countermovement jump performance is almost always better than SJ performance, and the difference in performance is thought to reflect an effective utilization of the stretch-shortening cycle. However, the mechanisms responsible for the performance-enhancing effect of the stretch-shortening cycle are frequently undefined. Uncovering and understanding these mechanisms is essential to make an inference regarding the difference between the jumps. Therefore, we will review the potential mechanisms that explain the better performance in a CMJ as compared with a SJ. It is concluded that the difference in performance may primarily be related to the greater uptake of muscle slack and the buildup of stimulation during the countermovement in a CMJ. Elastic energy may also have a small contribution to an enhanced CMJ performance. Therefore, a larger difference between the jumps is not necessarily a better indicator of high-intensity sports performance. Although a larger difference may reflect the utilization of elastic energy in a small-amplitude CMJ as a result of a well-developed capability to co-activate muscles and quickly build up stimulation, a larger difference may also reflect a poor capability to reduce the degree of muscle slack and build up stimulation in the SJ. Because the capability to reduce the degree of muscle slack and quickly build up stimulation in the SJ may be especially important to high-intensity sports performance, training protocols might concentrate on attaining a smaller difference between the jumps.

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Section: Stretch Reflexmentioning

confidence: 91%

Section: Jump and Squat Jumpmentioning

confidence: 99%

Section: Jump and Squat Jumpmentioning

confidence: 99%

Section: Residual Force Enhancementmentioning

confidence: 99%

See 2 more Smart Citations

The Difference Between Countermovement and Squat Jump Performances: A Review of Underlying Mechanisms With Practical Applications

Hooren¹,

Zolotarjova

2017

Journal of Strength and Conditioning Research

174

127

View full text Add to dashboard Cite

show abstract

“…As WBV enhances the recruitment of motor units [30,31], we assume that WBV can reduce the effects of bed rest on muscle strength by maintaining inter-and intramuscular coordination. Furthermore, WBV influences the stretch-shortening cycle involved significantly in jumping performance [66,67]. We thus suspect that WBVinduced neuro-muscular stimulation inhibited the loss of strength of the legs and functional performance during hospitalization [68].…”

Section: Discussionmentioning

confidence: 98%

Whole body vibration training during allogeneic hematopoietic cell transplantation—the effects on patients’ physical capacity

et al. 2020

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Patients undergoing allogeneic hematopoietic cell transplantation (alloHCT) experience a considerable decline in physical and psycho-social capacity. Since whole body vibration (WBV) is known to efficiently stimulate the neuromuscular system and enhance cardiorespiratory fitness and muscle strength in frail individuals, we hypothesized that WBV would maintain various physical and psychological capacities in patients during alloHCT. Seventy-one patients were randomly allocated to either an intervention group (IG) doing WBV or an active control group (CG) doing mobilization exercises five times per week. We determined peak oxygen consumption (VO 2peak) and maximum power, maximum strength, functional performance, body composition, quality of life (QoL), and fatigue. Tests were carried out before conditioning therapy, at hospital discharge and at day ± 180 (follow-up). As 18 patients did not participate in post-intervention assessment and follow-up data from 9 patients was not collectible, per-protocol (PP) analysis of 44 patients is presented. During hospitalization, WBV maintained maximum strength, height, and power output during jumping, as well as reported QoL, physical functioning, and fatigue level compared with mobilization. At follow-up, relative VO 2peak (p = 0.035) and maximum power (p = 0.011), time and power performing chairrising test (p = 0.022; p = 0.009), and reported physical functioning (p = 0.035) significantly increased in the IG, while fatigue decreased (p = 0.005). CG's body cell mass and phase angle had significantly decreased at follow-up (p = 0.002; p = 0.004). Thus, WBV might maintain maximum strength, functional performance, QoL, and fatigue during alloHCT, while cardiorespiratory fitness might benefit from accelerated recovery afterwards.

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Combined strength and plyometric exercise training improves running economy and muscle elastic energy storage and re-use in young untrained women

Meszler

Atlasz

Misovics

et al. 2019

European Journal of Integrative Medicine

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Stretch-shortening cycle characteristics during vertical jumps carried out with small and large range of motion

Cited by 17 publications

References 25 publications

The Difference Between Countermovement and Squat Jump Performances: A Review of Underlying Mechanisms With Practical Applications

The Difference Between Countermovement and Squat Jump Performances: A Review of Underlying Mechanisms With Practical Applications

Whole body vibration training during allogeneic hematopoietic cell transplantation—the effects on patients’ physical capacity

Combined strength and plyometric exercise training improves running economy and muscle elastic energy storage and re-use in young untrained women

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