PMID 36433355

Research
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Using Inertial and Physiological Sensors to Investigate the Effects of a High-Intensity Interval Training and Plyometric Program on the Performance of Young Judokas

Mañas-Paris A, Muyor JM, Oliva-Lozano JM

Question

Can inertial and physiological sensors detect performance changes after a short plyometric plus HIIT program in young judokas?

Summary

In young judokas, adding two weekly 60-minute plyometric plus HIIT sessions for 3 weeks to usual judo training improved Special Judo Fitness Test score and some throwing-speed sensor measures. The study was small, nonrandomized, athlete-specific, and did not clearly describe the added HIIT/plyometric exercise content.

Methodology

  • Thirty-two young judokas born 2007-2011 who knew the Ippon-Seoi-Nage throw.
  • 32 participants.
  • Judo-related plyometric and HIIT training.
  • Intensity: High-intensity interval training, exact intensity not reported.
  • 60 min.
  • 2 added sessions/week plus regular judo training.
  • 3 weeks.
  • Non-randomized controlled intervention
  • Special Judo Fitness Test, Angular speed, and Heart rate were tracked.

Outcomes

SJFT index

The experimental group improved SJFT index; control did not.

Experimental 22.27 +/- 2.73 to 19.65 +/- 1.70, table p=0.00, d=0.61; control 20.66 to 20.27, p=0.53

Improved

X-axis speed

X-axis angular velocity increased in the experimental group.

320.87 +/- 51.15 to 356.50 +/- 40.47 deg/s; reported significant with d=0.45

Improved

Y-axis speed

Y-axis angular velocity increased in the experimental group.

259.40 +/- 41.99 to 288.02 +/- 65.12 deg/s; p=0.02, d=0.31

Improved

Round effect

Round number affected X-axis angular speed in the experimental group.

Round effect F=10.81, p<=0.001, partial eta squared=0.68

Mixed

Insights

  • A short add-on block may improve sport-specific conditioning in youth judokas.
  • Wearable inertial sensors can detect technique-speed changes during combat-sport tests.
  • The intervention is not directly reusable because the HIIT/plyometric content is not sufficiently specified.

Limitations

  • Small nonrandomized sample.
  • Only young judokas; growth and maturation may influence results.
  • Intervention details beyond frequency and duration were unclear.
  • Only 3 weeks of training.
  • Sensor placement and fixation were noted as practical issues.

Safety

  • Adverse events were not reported.
  • Participants with musculoskeletal injury in the prior 3 months were excluded.