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Abbas Asadi, Hamid Arazi, Warren B. Young and Eduardo Sáez de Villarreal

Purpose:

To show a clear picture about the possible variables of enhancements of change-of-direction (COD) ability using longitudinal plyometric-training (PT) studies and determine specific factors that influence the training effects.

Methods:

A computerized search was performed, and 24 articles with a total of 46 effect sizes (ESs) in an experimental group and 25 ESs in a control group were reviewed to analyze the role of various factors on the impact of PT on COD performance.

Results:

The results showed that participants with good fitness levels obtained greater improvements in COD performance (P < .05), and basketball players gained more benefits of PT than other athletes. Also, men obtained COD results similar to those of women after PT. In relation to the variables of PT design, it appears that 7 wk (with 2 sessions/wk) using moderate intensity and 100 jumps per training session with a 72-h rest interval tends to improve COD ability. Performing PT with a combination of different types of plyometric exercises such as drop jumps + vertical jumps + standing long jumps is better than 1 form of exercise.

Conclusion:

It is apparent that PT can be effective at improving COD ability. The loading parameters are essential for exercise professionals, coaches, and strength and conditioning professionals with regard to the most appropriate dose-response trends to optimize plyometric-induced COD-ability gains.

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Marjan Someeh, Ali Asghar Norasteh, Hassan Daneshmandi and Abbas Asadi

Context:

Ankle sprains or chronic ankle instability (CAI) is common in athletes and a common method for decreasing the effects of ankle instable is using tape.

Objective:

To determine whether Mulligan ankle taping (MAT) influenced the functional performance (FP) tests in athletes with and without CAI.

Design:

A cross-sectional study using a within-subject experimental design between four ankle conditions (taped and untaped, athletes with and without CAI).

Setting:

Research laboratory.

Participants:

Sixteen professional athletes with unilateral CAI (10 men and 6 women; age 23.2 ± 3 years, height 175.4 ± 10.3 cm, weight 73 ± 14.5 kg, and body mass index 23.8 ± 3.6%) and 16 uninjured professional athletes (10 men and 6 women; age 22.8 ± 1.7 years, height 173.6 ± 12.2 cm, weight 66.4 ± 11.4 kg, and body mass index 22.2 ± 3.3%) volunteered to participant in this study.

Intervention:

Mulligan ankle taping.

Main Outcome Measures:

FP tests including single leg hopping course, Figure-of-8 hop and side hop were measured for both the groups in two conditions: taped and untaped.

Results:

There were significant differences between injured and uninjured athletes in all FP tests (P < .05). MAT significantly improved FP tests in both groups (P < .05).

Conclusion:

We found that MAT can improve FP tests in athletes with CAI and uninjured athletes. Therefore, it seems that MAT can be an effective method for enhancing athletes’ performance in sports that require lateral movements.