Lactic acid will build up in your student’s muscles in this active activity! Students first try to pinch a clothespin as many times as possible in a set time frame. As the number of trials increase, the fatigue of the muscles starts limiting the number of pinches. Students will also enjoy the second part of the activity, where they attempt to hold a book horizontally for as long as possible. By the forth trial, those muscles will be burning!
This resource also provides graphic notes with grade-appropriate information on lactic acid and its relationship to exercise and fermentation. The materials, procedures, and result tables are provided for students to place into science notebooks.
Click here for an activity where students measure the carbon dioxide in their breath after exercising.
Measuring Carbon Dioxide after Exercising
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