The Science of Symmetry: Why Unilateral Plyometrics are the Key to On-Ice Performance
Jul 05, 2026In the world of elite athletics, the difference between a podium finish and a mid-pack result often comes down to movement efficiency and explosive power.
For sports like ice hockey, which demand rapid change-of-direction (COD) and high-velocity skating, standard bilateral jumps are only half the battle. New research suggests that the real gains lie in a unilateral approach.
Inside the Research: The 8-Week Unilateral Protocol
A recent study published in the Journal of Strength and Conditioning Research investigated how an 8-week unilateral plyometric program affected 29 professional ice hockey players (15 men and 14 women).
While the control group followed their standard training, the experimental group added two sessions per week of specific unilateral drills, including:
- Unilateral Side Jumps
- Unilateral Countermovement Jumps (CMJ)
- Unilateral Long Jumps
- Skating Jumps
The volume was meticulously progressed over the two months, moving from 2 sets of 4 repetitions per leg in week one to 5 sets of 6 repetitions by week eight.
The Results: Explosive Gains and Reduced Asymmetry
The findings were clear: unilateral training doesn't just make athletes faster; it makes them more balanced. The experimental group saw significant improvements in jump performance (Single-Leg Hop and Triple Hop) and on-ice COD ability.
One of the most critical takeaways was the reduction in interlimb asymmetries. Asymmetry is a recognized risk factor for injury, and this study found that targeted unilateral work effectively narrowed the gap between an athlete's stronger and weaker legs.
Interestingly, the research noted sex-specific adaptations:
- Women showed massive improvements in Single-Leg Hop (SH) and Triple Hop (TH) distance, alongside a notable reduction in SH asymmetry.
- Men demonstrated significant gains in Countermovement Jump (CMJ) height, SH distance, and on-ice COD performance, with a specific reduction in COD asymmetry.
Coaching Takeaways: Programming with Purpose
For coaches, this research emphasizes that unilateral plyometrics are a non-negotiable for multidirectional athletes. By integrating skating-specific jumps and unilateral bounds, you can promote movement efficiency and ensure your athletes are as resilient as they are powerful.
However, the study also highlights the importance of an individualized approach. Because men and women adapted differently to the same protocol, coaches must regularly assess interlimb asymmetries and adjust training volume and exercise selection to meet the specific needs of the athlete.
If you want to move beyond "doing jumps" and start building evidence-based programs like the one used in this study, Plyometrics 101 is your roadmap.
Designed by Dr. Matt Casturo and 10+ elite coaches, this course gives you a repeatable 3-step system to assess readiness, manage ground contact times, and program elite-level plyometrics in minutes. You'll get:
- 1.2 NSCA CEUs to level up your credentials.
- A Programming Flowsheet and Volume Chart to eliminate guesswork.
- An 80-exercise library with specific coaching cues for every drill.
You can Join Plyometrics 101 Today
Ref: Moreno-Azze A, López-Plaza D, Falcón-Miguel D, Gómez-Carmona CD. The effects of an 8-week unilateral plyometric training program on jump performance, change of direction, and interlimb asymmetries in ice hockey players. J Strength Cond Res. 2026;40(7):788–798
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