Forearm Exercise Test

A forearm exercise test is a simple blood extraction in the forearm before and after performance of a short exercise that is a very useful test in the diagnosis of certain disorders affecting the metabolic functions of the muscles. 


Why am I getting this test?

 This test is requested by your doctor because they suspect that you may have a metabolic problem affecting your muscles, which are usually manifested with physical exercise.

What is being measured with this test?

This test measures changes in the blood composition of two parameters, ammonia and lactate, with exercise.

How is the procedure done?

The test involves drawing some blood before and after a brief hand exercise. The following steps are necessary:

  • Insert a needle in the forearm in order to draw blood.
  • Perform a one minute hand gripping exercise.
  • Take blood before and at certain times after the exercise, usually several times for up to 10 – 15 minutes.

Is there any aftercare needed?

Similar to any other type of blood drawing, there are no after effects. We usually recommend subjects to watch for cramps or spasms affecting the forearm that may occur in people with metabolic problems of the muscle with exercise.

How long does the test take?

Overall, the test is usually completed in about half an hour.

How long will it take to get results?

It usually takes 24 hours to get the results back. We will make the results available to your doctor as soon as we receive them.