LOW BACK STRENGTH TEST 

About This Test
This test, like all tests of maximum strength, power or other physical performance can be performed by the majority of the population without problems provided that appropriate preparation has been done. This includes: · warm-up exercises · mobility and stretching exercises · several submaximal efforts doing the same movement pattern as the test, ie. back strength test. · screening subjects for any potential back/ neck problems or other musculo-skeletal problems which may be exacerbated by this maximal effort.

Equipment Required:

1.  Back/leg dynamometer

Procedure:

1. Instruct the subject on the purpose of the test.

2. Ensure that the subject does not have any back problems.

3. The subject stands on the platform with the feet a comfortable distance apart for balance, usually of a shoulder width distance. While maintaining an upright posture with the arms and legs straight, place the palms of the hands on the front of the thigh.

4. Adjust the chain/belt so that the bar is just at finger tip level.

5. The subject bends forward at the hips, grasping the bar with one palm facing forward and the other backward. The back should be straight from the low back to the shoulder. The chest should be forward.

6. The subject should inhale, and as he/she slowly exhales, attempts to forcefully extend the trunk the hips by pulling upwards on the bar, while keeping the legs straight. The final position should be just short of the upright position.

7. Record the subject’s score in kilograms and repeat the test after about two minutes recovery, adjusting the belt/chain where necessary.

8. If the tester is not satisfied that a maximum effort has been achieved, a third attempt may be made.

9. Enter the results into the data entry screen.

[Reference: Schell and Leelarthaepin (1994)]