The objective of this lab is to examine the effects of exercise induced muscle fatigue. This is a lab activity that can be used after teaching muscle fatigue and help reinforce the newly learned concepts by performing this lab. This is an easy to set up lab with only a clothespin and stop watch for the materials. The lab takes about one class period and depending on the student the conclusion questions may need to be done for homework or in the next class. The conclusion questions make students analyze how and why muscle fatigue.