1. Respiration

Mention the answer in one or two lines:
 
After recovering from an injury, a runner immediately resumed high-intensity sprint training without gradually rebuilding stamina. Within minutes, he experienced pain and stiffness in his leg muscles. This occurred due to ___________.
Login or Fast registration
Previous theory
Exit to the topic
Next task
Copyright © 2026 YaClass Tech Private Limited Contacts Terms and Conditions Privacy Policy