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Christopher Thomas, Paul Comfort, Paul A. Jones and Thomas Dos’Santos

Purpose:

To investigate the relationships between maximal isometric strength, vertical jump (VJ), sprint speed, and change-of-direction speed (CoDS) in academy netball players and determine whether players who have high performance in isometric strength testing would demonstrate superior performance in VJ, sprint speed, and CoDS measures.

Method:

Twenty-six young female netball players (age 16.1 ± 1.2 y, height 173.9 ± 5.7 cm, body mass 66.0 ± 7.2 kg) from a regional netball academy performed isometric midthigh pull (IMTP), squat jumps (SJs), countermovement jumps (CMJs), 10-m sprints, and CoDS (505).

Results:

IMTP measures displayed moderate to strong correlations with sprint and CoDS performance (r = –.41 to –.66). The VJs, which included SJs and CMJs, demonstrated strong correlations with 10-m sprint times (r = –.60 to –.65; P < .01) and CoDS (r = –.60 to –.71; P = .01). Stronger players displayed significantly faster sprint (ES = 1.1–1.2) and CoDS times (ES = 1.2–1.7) and greater VJ height (ES = 0.9–1.0) than weaker players.

Conclusion:

The results of this study illustrate the importance of developing high levels of lower-body strength to enhance VJ, sprint, and CoDS performance in youth netball players, with stronger athletes demonstrating superior VJ, sprint, and CoDS performances.

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Tarik Ozmen, Mert Aydogmus, Hanife Dogan, Derya Acar, Tuba Zoroglu and Mark Willems

Context:

Kinesio taping (KT) is a taping technique extensively used in rehabilitation of sports injuries; however, the effect of KT on delayed-onset muscle soreness is not entirely clear.

Objectives:

To investigate the effect of kinesio tape on the quadriceps femoris on muscle pain, flexibility, and sprint performance after squat exercise.

Design:

Crossover study.

Setting:

University research laboratory.

Participants:

19 female university students (age 21.0 ± 1.2 y, weight 53.0 ± 4.6 kg, height 164 ± 4 cm).

Main Outcome Measures:

Pressure-pain threshold for quadriceps femoris was recorded using pressure algometry. Quadriceps femoris flexibility was measured as the range of motion of knee flexion with a stainless steel goniometer. Sprint-speed measurements were conducted using photocells placed at 0 and 20 m. All participants completed both conditions (KT application and no KT application) after a 1-wk washout period. Measurements were taken at baseline and 48 h postexercise. For the KT condition, KT was applied immediately before the exercise protocol and remained on the skin for 48 h.

Results:

Squat exercise reduced flexibility and increased pain and sprint time compared with baseline. KT application resulted in similar sprint time and muscle pain as the no-KT condition but maintained flexibility compared with baseline.

Conclusions:

KT application immediately before squat exercise has no effect on muscle pain and short sprint performance but maintains muscle flexibility at 2 days of recovery.

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Jason Moran, Gavin R.H. Sandercock, Rodrigo Ramírez-Campillo, Oliver Todd, Jay Collison and Dave A. Parry

Purpose:

The purpose of this intervention study was to investigate if a low-dose of plyometric training (PT) could improve sprint and jump performance in groups of different maturity status.

Method:

Male youth field hockey players were divided into Pre-PHV (from -1 to -1.9 from PHV; Experimental: n = 9; Control = 12) and Mid-PHV (0 to +0.9 from PHV; Experimental: n = 8; Control = 9) groups. Participants in the experimental groups completed 60 foot contacts, twice-weekly for 6 weeks.

Results:

PT exerted a positive effect (effect size: 0.4 [-0.4–1.2]) on 10 m sprint time in the experimental Mid-PHV group but this was less pronounced in the Pre-PHV group (0.1 [-0.6–0.9]). Sprint time over 30 m (Mid-PHV: 0.1 [-0.8–0.9]; Pre-PHV: 0.1 [-0.7–0.9]) and CMJ (Mid-PHV: 0.1 [-0.8–0.9]; Pre-PHV: 0.0 [-0.7–0.8]) was maintained across both experimental groups. Conversely, the control groups showed decreased performance in most tests at follow up. Between-group analysis showed positive effect sizes across all performance tests in the Mid-PHV group, contrasting with all negative effect sizes in the Pre-PHV group.

Conclusion:

These results indicate that more mature hockey players may benefit to a greater extent than less mature hockey players from a low-dose PT stimulus. Sixty foot contacts, twice per week, seems effective in improving short sprint performance in Mid-PHV hockey players.

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Zeynep Hazar Kanik, Seyit Citaker, Canan Yilmaz Demirtas, Neslihan Celik Bukan, Bulent Celik and Gurkan Gunaydin

had no effect on muscle pain and short sprint performance but maintained muscle flexibility compared with no KT application. However, Lee et al 10 did not mention which technique of KT was applied, whereas Ozmen et al 11 did not follow conventional muscle damage protocol and measure other markers of

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Berkiye Kirmizigil, Jeffry Roy Chauchat, Omer Yalciner, Gozde Iyigun, Ender Angin and Gul Baltaci

findings, in a crossover study conducted by Ozmen et al, 10 KT was found out to be useless in the recovery of DOMS and short sprint performance 48 hours postexercise. However, the same study showed that KT maintained flexibility. They applied from origin to insertion of quadriceps femoris muscle a Y

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Aaron T. Scanlan, Neal Wen, Joshua H. Guy, Nathan Elsworthy, Michele Lastella, David B. Pyne, Daniele Conte and Vincent J. Dalbo

jump distance in the sagittal plane. Similarly, impulse at 100 and 250 ms provides insight into the rapidity of force generation important for short sprinting performance (5 m). Therefore, basketball practitioners may use IMTP outcomes to assess attributes important for sport-specific, power