The Leg Extension test is an isometric strength test as a measure of lower body strength. In this test, the participant sits on a table and attempts to extend the leg against an immovable object.
purpose: to measure lower body strength.
equipment required: a table and a specially constructed box with two arm supports, connected to a screen.
pre-test: Explain the test procedures to the subject. Perform screening of health risks and obtain informed consent. Prepare forms and record basic information such as age, height, body weight, gender and test conditions. Perform a standard warm-up. See more details of pre-test procedures.
procedure: The participant sits on the table between the arm supports with their lower legs hanging down (knee angle 90°). A shin guard attached to a resistance is fastened around the right lower leg of the participant, who must try to extend the right leg by raising the lower leg with maximum strength and hold that position for 3 seconds. During the test, the participant may lean on the arm supports. Explosive movements should be avoided. The score is given in kilograms of force. After one practice trial, the best score of three trials is recorded. The resting period between trials is approximately 30 s.
scoring: The measurement is in Kg force. The higher score indicates a better performance.
disadvantages: the blocks specifically for this test needs to be obtained
target population: this test was designed specifically for the elderly population.
comments: The participants should be strongly encouraged to give a maximum effort to maximize their scores.
reference: Koen A.P.Lemmink, Han Kemper, Mathieu H.G. de Greef, and Piet Rispens P, Stevens M, Reliability of the Groningen Fitness Test for the Elderly, Journal of Aging and Physical Activity, 2001, 9, 194-212
The Test in Action
- This test is part of the protocol for the Groningen Fitness Test for the Elderly.
- Mid-Thigh Pull Test (IMTP) — an isometric leg strength test, the participant pulls against a static object.
- Isometric Back Strength — hold a horizontal position while hanging over the edge of a bench for a set time period.
- Isometric Push-Up (Brockport) — the 'up' position is held for as long as possible.
- Isometric Push-Up Hold Test — the 'down' position is held for as long as possible.
- Isokinetic strength tests
- About the leg extension machine
- Why You Should be Avoiding the Leg Extension
- More about the Groningen Fitness Test for the Elderly
- A discussion about Fitness Testing for the Elderly
- Other Strength Tests