Strength Endurance Test: Shoulder Isometric Endurance Tests (5% BW)

strength-endurance Jul 05, 2023

The Shoulder Isometric Endurance Tests at 5% Body Weight (BW) for abduction, external rotation, and flexion are assessments used to evaluate the endurance and strength of specific shoulder muscles.

Performing these tests generally involves:

  1. Setup: Sit or stand with the arm at the side for the abduction and external rotation tests. For flexion, the arm is lifted forward to shoulder level.

  2. Application of Weight: Attach a weight equal to 5% of the individual's body weight to the wrist or hand of the arm being tested.

  3. Isometric Contraction: Hold the arm in the specific position (abducted away from the body, externally rotated, or lifted forward) against the resistance of the weight for as long as possible without compromising form.

  4. Endurance Measurement: Measure the duration of time (in seconds) that the individual can maintain the isometric contraction. This duration indicates the endurance and strength of the shoulder muscles being tested.

These tests aim to evaluate the endurance capacity of the shoulder muscles in various positions and can be part of a broader assessment used in rehabilitation, sports medicine, or physical therapy contexts. Proper execution and accurate measurement are crucial for meaningful results.

Normative data for the Shoulder Isometric Endurance Tests at 5% Body Weight (BW) for abduction, external rotation, and flexion might exist in specific research studies or within clinical settings. However, comprehensive and widely accepted normative data for these exact tests across various populations might not be readily available.



  • Westrick, Richard B., et al. "Isometric shoulder strength reference values for physically active collegiate males and females." Sports Health 5.1 (2013): 17-21.
  • Barlow, JOSHUA C., et al. "Shoulder strength and range-of-motion characteristics in bodybuilders." The Journal of Strength & Conditioning Research 16.3 (2002): 367-372.
  • Ellenbecker, Todd S., and George J. Davies. "The application of isokinetics in testing and rehabilitation of the shoulder complex." Journal of athletic training 35.3 (2000): 338.

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