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  • 1
    Online Resource
    Online Resource
    The Acute Effect of Drop Jump Protocols With Different Volumes and Recovery Time on Countermovement Jump Performance
    Ovid Technologies (Wolters Kluwer Health) ; 2013
    In:  Journal of Strength and Conditioning Research Vol. 27, No. 1 ( 2013-01), p. 154-158
    Details
    In: Journal of Strength and Conditioning Research, Ovid Technologies (Wolters Kluwer Health), Vol. 27, No. 1 ( 2013-01), p. 154-158
    Type of Medium: Online Resource
    ISSN: 1064-8011
    URL: Article
    DOI: 10.1519/JSC.0b013e3182518407
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2013
    detail.hit.zdb_id: 2142889-X
    SSG: 31
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  • 2
    Online Resource
    Online Resource
    Acute Effects of Handheld Loading on Standing Broad Jump in Youth Athletes
    MDPI AG ; 2021
    In:  International Journal of Environmental Research and Public Health Vol. 18, No. 9 ( 2021-05-10), p. 5046-
    Details
    In: International Journal of Environmental Research and Public Health, MDPI AG, Vol. 18, No. 9 ( 2021-05-10), p. 5046-
    Abstract: The study aimed to investigate the acute effects of handheld loading on standing broad jump (SBJ) performance and biomechanics. Fifteen youth male athletes (mean age: 14.7 ± 0.9 years; body mass: 59.3 ± 8.0 kg; height: 1.73 ± 0.07 m) volunteered to participate in the study. Participants were assigned to perform SBJ with and without 4 kg dumbbells in a random order. Kinematic and kinetic data were collected using 10 infrared high-speed motion-capture cameras at a 250 Hz sampling rate and two force platforms at a 1000 Hz sampling rate. A paired t-test was applied to all variables to determine the significance between loading and unloading SBJs. Horizontal distance (p 〈 0.001), take-off distance (p = 0.001), landing distance (p 〈 0.001), horizontal velocity of center of mass (CoM; p 〈 0.001), push time (p 〈 0.001), vertical impulse (p = 0.003), and peak horizontal and vertical ground reaction force (GRF; p 〈 0.001, p = 0.017) were significantly greater in loading SBJ than in unloading SBJ. The take-off vertical velocity of CoM (p = 0.001), take-off angle (p 〈 0.001), peak knee and hip velocity (p 〈 0.001, p = 0.007), peak ankle and hip moment (p = 0.006, p = 0.011), and peak hip power (p = 0.014) were significantly greater in unloading SBJ than in loading SBJ. Conclusions: Acute enhancement in SBJ performance was observed with handheld loading. The present findings contribute to the understanding of biomechanical differences in SBJ performance with handheld loading and are highly applicable to strength and conditioning training for athletes.
    Type of Medium: Online Resource
    ISSN: 1660-4601
    URL: Article
    DOI: 10.3390/ijerph18095046
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2175195-X
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  • 3
    Online Resource
    Online Resource
    Handheld-Load-Specific Jump Training over 8 Weeks Improves Standing Broad Jump Performance in Adolescent Athletes
    MDPI AG ; 2022
    In:  Healthcare Vol. 10, No. 11 ( 2022-11-17), p. 2301-
    Details
    In: Healthcare, MDPI AG, Vol. 10, No. 11 ( 2022-11-17), p. 2301-
    Abstract: This study investigated the effects of handheld-load-specific jump training on standing broad jump (SBJ) performance in youth athletes and the biomechanics changes involved. Methods: Fifteen male athletes (mean age, body weight, height, and body mass index were 14.7 ± 0.9 years, 59.3 ± 8.0 kg, 1.73 ± 0.07 m, 19.8 ± 2, respectively) underwent 15 SBJ training sessions over 8 weeks. The data were collected over three phases: before training, after training, and after training with 4 kg loading. Ten infrared high-speed motion-capture cameras and two force platforms, whose sampling rates were 250 and 1000 Hz, respectively, were used to record the kinematic and kinetic data. Visual three-dimensional software was used for the data analyses. Results: Jump performance and all biomechanics variables, including joint and takeoff velocities, ground reaction force, takeoff impulse, and mechanical outputs, improved after training. Conclusions: SBJ training under handheld loading resulted in considerable acute improvements as well as training transfer after 8 weeks. Moreover, explosive ability was effectively enhanced. The present findings serve as a reference for SBJ assessment and jump-related training.
    Type of Medium: Online Resource
    ISSN: 2227-9032
    URL: Article
    DOI: 10.3390/healthcare10112301
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2721009-1
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  • 4
    Online Resource
    Online Resource
    Effects of Relative Drop Heights of Drop Jump Biomechanics in Male Volleyball Players
    Georg Thieme Verlag KG ; 2019
    In:  International Journal of Sports Medicine Vol. 40, No. 13 ( 2019-12), p. 863-870
    Details
    In: International Journal of Sports Medicine, Georg Thieme Verlag KG, Vol. 40, No. 13 ( 2019-12), p. 863-870
    Abstract: Previous cross-sectional studies have reported that higher drop heights do not always result in improved performance, and may increase injury risk during drop jumps (DJ). The purpose of this study was to analyze the kinematics and kinetics during the DJ in order to determine the relative drop height that maximize performance without exposing the lower extremity joints to unnecessary loads. Twenty male Division I college volleyball players volunteered. Data were collected using 11 infrared cameras and two force platforms. Participants performed three maximal effort countermovement jumps (CMJ). Subsequently, 50, 75, 100, 125, and 150% CMJ height (CMJH) was used to scale their relative drop height for three DJ trials per height. There was a significant increase in the landing phase impulse when the drop height exceeded 100%CMJH (p 〈 0.05). At 125% and 150%CMJH, the negative work of knee and ankle significantly increased. The incoming velocity, kinetic energy, landing depth, maximum ground reaction force, landing impulse and power absorption of knee and ankle all increased with drop height (p 〈 0.05). DJ height and reactive strength index following the drop landing were not statistically different between any of the drop heights (p 〉 0.05). 50% to 100%CMJH may be the appropriate individual relative drop height for the DJ.
    Type of Medium: Online Resource
    ISSN: 0172-4622 , 1439-3964
    URL: Article
    DOI: 10.1055/a-0969-8623
    RVK:
    ZX 1000
    Language: English
    Publisher: Georg Thieme Verlag KG
    Publication Date: 2019
    detail.hit.zdb_id: 2041541-2
    SSG: 31
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Can Different Complex Training Improve the Individual Phenomenon of Post-Activation Potentiation?
    Walter de Gruyter GmbH ; 2017
    In:  Journal of Human Kinetics Vol. 56, No. 1 ( 2017-2-25), p. 167-175
    Details
    In: Journal of Human Kinetics, Walter de Gruyter GmbH, Vol. 56, No. 1 ( 2017-2-25), p. 167-175
    Abstract: The aims of the present study were (a) to determine whether the two types of complex training and vibration complex training would improve the individual phenomenon of post-activation potentiation (PAP) for every athlete in a team setting; and (b) to compare the acute effect of resistance and plyometric exercise, whole body vibration, complex training and vibration complex training on vertical jump performance. The participants were ten male division I college volleyball and basketball players. They were asked to perform three vertical jumps as a pre-test and were then randomly assigned to one of five PAP protocols, resistance exercise using half squat exercise, plyometric exercise using drop jumps with individualized drop height, whole body vibration using squats on a vibration plate, complex training combining resistance exercise with plyometric exercise, vibration complex training combining whole body vibration with plyometric exercise. Three vertical jumps were performed four minutes after the PAP protocol as a post-test. A two-way repeated-measures analysis of variance was used to examine the differences among the five PAP protocols and between the two testing times. Our results showed that the post-test results were significantly improved compared to the pre-test for the vertical jump height (p = .015) in all PAP protocols. There was, however, an individual phenomenon of PAP in the response to all PAP protocols. In conclusion, this study found that resistance and plyometric exercise, whole body vibration, complex training and vibration complex training induce similar group PAP benefits. However, some athletes decreased their performances in some of the exercises in the study. Therefore, it is not recommended for coaches to arrange the exercises in a team setting.
    Type of Medium: Online Resource
    ISSN: 1899-7562
    URL: Article
    DOI: 10.1515/hukin-2017-0034
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2503989-1
    SSG: 31
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  • 6
    Online Resource
    Online Resource
    Effects of Mat Exergame-Based Multicomponent Training on the Standing Balance of Community-Dwelling Older Adults With and Without Fall Risk
    Mary Ann Liebert Inc ; 2022
    In:  Games for Health Journal Vol. 11, No. 3 ( 2022-06-01), p. 186-192
    Details
    In: Games for Health Journal, Mary Ann Liebert Inc, Vol. 11, No. 3 ( 2022-06-01), p. 186-192
    Type of Medium: Online Resource
    ISSN: 2161-783X , 2161-7856
    URL: Article
    DOI: 10.1089/g4h.2021.0149
    Language: English
    Publisher: Mary Ann Liebert Inc
    Publication Date: 2022
    SSG: 31
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  • 7
    Online Resource
    Online Resource
    Novel Mat Exergaming to Improve the Physical Performance, Cognitive Function, and Dual-Task Walking and Decrease the Fall Risk of Community-Dwelling Older Adults
    Frontiers Media SA ; 2020
    In:  Frontiers in Psychology Vol. 11 ( 2020-7-24)
    Details
    In: Frontiers in Psychology, Frontiers Media SA, Vol. 11 ( 2020-7-24)
    Type of Medium: Online Resource
    ISSN: 1664-1078
    URL: Article
    DOI: 10.3389/fpsyg.2020.01620
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2020
    detail.hit.zdb_id: 2563826-9
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  • 8
    Online Resource
    Online Resource
    Acute Effects of Squats Using Elastic Bands on Postactivation Potentiation
    Ovid Technologies (Wolters Kluwer Health) ; 2021
    In:  Journal of Strength and Conditioning Research Vol. 35, No. 12 ( 2021-12), p. 3334-3340
    Details
    In: Journal of Strength and Conditioning Research, Ovid Technologies (Wolters Kluwer Health), Vol. 35, No. 12 ( 2021-12), p. 3334-3340
    Abstract: Peng, H-T, Zhan, D-W, Song, C-Y, Chen, Z-R, Gu, C-Y, Wang, I-L, and Wang, L-I. Acute effects of squats using elastic bands on postactivation potentiation. J Strength Cond Res 35(12): 3334–3340, 2021—The study aimed to investigate the acute effects of squats using elastic bands at different resistance and recovery time points on postactivation potentiation (PAP). Fifteen male collegiate physical education students volunteered to participate in the study. Subjects were assigned to 6 experimental visits, which consisted of repeated factors that were 2 resistance squats (3 repetition maximum [RM] and 5RM) with elastic bands as intervention and 3 performance tests (countermovement jumps [CMJs] , 20-m sprints, and change of direction [COD]). The performance test was measured before the resistance squat (pre-test) and at 15 seconds, 4 minutes, and 8 minutes after the resistance squat (post-tests) on each visit. An AMTI force plate and a set of Optojump sensors were used to obtain ground reaction force data during the CMJs and during the 20-m sprints and COD test, respectively. Repeated-measures two-way analyses of variance were performed for the resistance squats and recovery time points for each dependent variable. The 20-m sprint and COD test times at the 4-minute recovery time point after 3RM and 5RM resistance squatting were shorter than the pre-test values ( p 〈 0.05). The rates of force development at the 4- and 8-minute recovery time points after 5RM resistance squatting were higher than the corresponding pre-test values ( p 〈 0.05). All test performance variables significantly decreased at the 15-second recovery time point ( p 〈 0.05). The use of elastic bands in 3RM and 5RM resistance squatting as a warm-up activity may positively affect PAP to improve sprinting, COD ability, and jump explosiveness at the 4-minute recovery time point.
    Type of Medium: Online Resource
    ISSN: 1064-8011
    URL: Article
    DOI: 10.1519/JSC.0000000000003618
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 2142889-X
    SSG: 31
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  • 9
    Online Resource
    Online Resource
    Whole Body Vibration Immediately Decreases Lower Extremity Loading During the Drop Jump
    Ovid Technologies (Wolters Kluwer Health) ; 2016
    In:  Journal of Strength and Conditioning Research Vol. 30, No. 9 ( 2016-09), p. 2476-2481
    Details
    In: Journal of Strength and Conditioning Research, Ovid Technologies (Wolters Kluwer Health), Vol. 30, No. 9 ( 2016-09), p. 2476-2481
    Abstract: Chen, Z-R, Peng, H-T, Siao, S-W, Hou, Y-T, and Wang, L-I. Whole body vibration immediately decreases lower extremity loading during the drop jump. J Strength Cond Res 30(9): 2476–2481, 2016—The purpose of this study was to evaluate the acute effect of whole body vibration (WBV) on lower extremity loading during the drop jump (DJ). Fifteen male collegiate physical education students randomly completed 3 experimental sessions on 3 separate days with 4 days interval between sessions (performing 3 trials of DJ from 30-, 40-, and 50-cm drop heights before WBV and 4 minutes after WBV). Eight cameras and 2 force platforms were used to record kinematic and kinetic data, respectively. Peak impact force and loading rate significantly decreased after WBV during DJ from 40 and 50 cm. Knee angular displacements significantly increased after WBV during DJ from 30, 40, and 50 cm. Whole body vibration may help immediately reduce lower extremity loading.
    Type of Medium: Online Resource
    ISSN: 1064-8011
    URL: Article
    DOI: 10.1519/JSC.0000000000001358
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2016
    detail.hit.zdb_id: 2142889-X
    SSG: 31
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  • 10
    Online Resource
    Online Resource
    Effect of fore-medial-side thin insole on lower extremities biomechanics in college male basketball players
    Informa UK Limited ; 2017
    In:  Footwear Science Vol. 9, No. sup1 ( 2017-06-30), p. S79-S80
    Details
    In: Footwear Science, Informa UK Limited, Vol. 9, No. sup1 ( 2017-06-30), p. S79-S80
    Type of Medium: Online Resource
    ISSN: 1942-4280 , 1942-4299
    URL: Article
    DOI: 10.1080/19424280.2017.1314349
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2017
    detail.hit.zdb_id: 2503699-3
    SSG: 31
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