Trunk Flexor Endurance Test

Trunk Flexor Endurance Test

(also called the V-sit-Flexor Endurance Test)

Equipment

1. Stopwatch or clock with a second hand

2. Exercise mat or padded exercise table

3. Two helpers

4. A wedge angled at 55 degrees from the floor or padded bench (optional)

Preparation

Warm up with some low-intensity activity such as walking or easy jogging.

Instructions

1. To start, assume a sit-up posture with your back supported at an angle of 55 degrees from the floor; support can be provided by a wedge, a padded bench, or a spotter (see photos). Your knees and hips should I both be flexed at 90 degrees, and your arms should be folded across your chest with your hands placed on the opposite shoulders. Your toes should be secured under a toe strap or held by a partner.

2. Your goal is to hold the starting position (isometric contraction) as long as possible after the support is pulled away. To begin the test, a helper should pull the wedge or other support back about 10 centimeters (4 inches). The helper should keep track of the time; if a spotter is acting as your support, she or he should be ready to support your weight as soon as your torso begins to move back. Your final score is the total time you are able to hold the contraction from the time the support is removed until any part of your back touches the support or you request to discontinue the test. Remember to breathe normally throughout the test.

3. Record your time here and on the chart at the end of the lab. Trunk flexors endurance time:sec

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