Investigate muscle fatigue with this simple muscle fatigue lab activity. Students can graph their results or focus on the qualitative aspects of the activity. Likely you already have the required simple equipment needed for this memorable lab.
 
Questions Answered:
What happens when muscles contract over and over? 
What causes muscle cramps? 
How can you demonstrate muscle fatigue?
 
Topics Addressed:
Muscles become fatigued when used quickly and repetitively. 
Muscle fatigue can be measured.
 
Materials Needed
binder clips or clothespins, second timer
 
Answer Key
Yes! Plus extensive teacher notes address the many questions that come up. You shouldn’t have to do outside research on this topic unless you want to. Specific charts and graphic organizers have keys. 
 
Teaching Time 
About 20–30 minutes, longer with included writing assignment
 
Preparation Time
none
 
Target Audience
Middle School Students, Ages 11-14
 
Student Sheets
Scaffolded writing prompts & lab reporting 
Diagrams for labeling