What is the main purpose of including warm-up and cool-down periods in exercise sessions?

to maintain muscle size

to increase strength

to prevent injuries

to improve endurance

the ecg findings of an acute anterior myocardial infarction wall include: st segment elevation in the anterior leads (v3 and v4) at the j point and sometimes in the septal or lateral leads, depending on the extent of the mi. this st segment elevation is concave downward and frequently overwhelms the t wave.

explanation:

9, 5, 10000000 ( that is supposed to be a ten for the last one)