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Related Experiment Videos

Limited range-of-motion lumbar extension strength training.

J E Graves1, M L Pollock, S H Leggett

  • 1Center for Exercise Science, College of Medicine, University of Florida, Gainesville 32610.

Medicine and Science in Sports and Exercise
|January 1, 1992
PubMed
Summary
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Limited range-of-motion (ROM) resistance training effectively builds lumbar extension strength. Training within a 36-degree ROM improves strength across a 72-degree range, comparable to full ROM training.

Area of Science:

  • Exercise Physiology
  • Biomechanics
  • Strength and Conditioning

Background:

  • Limited range-of-motion (ROM) resistance training is a common method for targeted muscle development.
  • The efficacy of specific ROM training for overall lumbar extension strength requires further investigation.

Purpose of the Study:

  • To evaluate the impact of limited range-of-motion (ROM) resistance training on lumbar extension strength development.
  • To compare the effectiveness of training within specific 36-degree ROMs versus a full 72-degree ROM.

Main Methods:

  • 12-week study with 58 participants (33 men, 25 women) assigned to three training groups (72-36°, 36-0°, 72-0° ROM) or a control group.
  • Training involved one set of 8-12 repetitions of variable resistance lumbar extensions once weekly.

Related Experiment Videos

  • Isometric lumbar extension torque was measured at 0°, 12°, 24°, 36°, 48°, 60°, and 72° before and after training.

    • Main Results:

    • All training groups (72-36°, 36-0°, 72-0°) demonstrated significant increases in lumbar extension torque at all measured angles compared to the control group (P ≤ 0.05).
    • The greatest strength gains were observed within the specific training ranges for groups A (72-36°) and B (36-0°).
    • No significant differences in torque development were found between the limited ROM groups (A, B) and the full ROM group (AB) at any angle (P > 0.05).

    Conclusions:

    • Limited range-of-motion (ROM) resistance training, even within a 36-degree arc, is effective for enhancing lumbar extension strength.
    • Training through a 36-degree ROM can yield strength gains comparable to training through a larger 72-degree ROM.
    • These findings suggest that targeted, limited ROM training can be a viable strategy for improving overall lumbar extension strength.