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Alissa C. Rhode, Lauren M. Lavelle, and David C. Berry
Clinical Scenario: ReBound is a portable shortwave diathermy unit used to heat tissues using the same principle as induction drum shortwave diathermy. It is unclear if ReBound can vigorously (4°C) heat intramuscular tissue as efficiently as other thermal agents. Clinical Question: In adults (P), is ReBound diathermy (I) compared with other thermal agents (C) effective at increasing intramuscular tissue temperature by 4°C (O)? Summary of Key Findings: (1) Three studies were included for review, all randomized crossover studies. (2) All studies agreed ReBound does not achieve vigorous (4°C) heating effects during a 30-minute treatment to the triceps surae muscle (depth = 1 and 3 cm). (3) Studies agreed that the heat generated by ReBound dissipates slower than (P < .001) or similar to pulsed shortwave diathermy at 3 cm and faster than moist hot packs (P < .001) at 1 cm. (4) One study found that intramuscular tissue temperatures increased more with ReBound (3.69°C [1.50°C]) than moist hot packs (2.82°C [0.90°C]) at superficial depths (1 cm, d = 0.70). (5) Two studies compared ReBound with MegaPulse II pulsed shortwave diathermy at a 3 cm depth. One found that the MegaPulse II increased intramuscular tissue temperature by 4.32°C (1.79°C) compared with the ReBound’s 2.31°C (0.87°C) increase (d = 1.43). The final study reported that the MegaPulse II increased triceps surae muscle temperature by 3.47°C (0.92°C) versus ReBound at 3.08°C (1.19°C) (d = 0.37). (6) The combined results are an increase of 3.81 (1.38°C) for the MegaPulse II and 2.77 (1.12°C) for ReBound (d = 0.83). Clinical Bottom Line: Results strongly indicate that the ReBound should not be used for vigorous (4°C) heating effects in the triceps surae muscle at 1 and 3 cm. Clinicians can use ReBound when traveling or instead of moist hot packs for moderate (2°C–3°C) heating effects at deep and superficial levels (1 and 3 cm) for large treatment areas with subcutaneous fat thickness <15 mm. Strength of Recommendation: Consistent level B findings indicate that ReBound does not achieve vigorous heating effects (4°C).
David C. Berry
Column-editor : Joseph J. Piccininni
Michael G. Miller, David C. Berry, Susan Bullard, and Roger Gilders
Context:
Land and aquatic plyometrics have clinical relevance for exercise, sport performance, and rehabilitation, yet study is limited comparing both.
Objective:
To compare the effects of land-based and aquatic-based plyometric-training programs on performance variables, muscle soreness, and range of motion (ROM).
Setting:
Aquatic facility and biomechanics laboratory.
Subjects:
Forty subjects randomly assigned to 3 groups: land (n = 13), water (n = 13), and control (n = 14).
Main Outcome Measures:
Performance variables, muscle soreness, and ROM were measured before and after an 8-week training period. An analysis of covariance (ANCOVA) and a Bonferroni post hoc test determined significance.
Results:
ANCOVA revealed significant differences between groups with respect to plantar-flexion ROM (P < .05). Paired t test determined that the aquatic group significantly increased muscle power pretest to posttest (P < .05).
Conclusions:
Results indicate that aquatic plyometric training can be an alternative approach to enhancing performance.
