Final answer:
Greater muscle force is generated by fast glycolytic (FG) contractions, which use anaerobic metabolism for quick and powerful contraction with less oxygen and energy, resulting in faster fatigue.
Step-by-step explanation:
Greater muscle force is produced with fast glycolytic (FG) contractions; however, during these contractions, less O2 and energy is utilized compared to other muscle fiber types. FG fibers utilize anaerobic metabolism to produce ATP, which allows for strong and rapid contractions, but these types of contractions also lead to quicker fatigue.
This contrasts with slow oxidative (SO) fibers that use aerobic metabolism, supporting continuous and less forceful contractions over extended periods and with a slower fatigue rate. Fast glycolytic fibers are especially engaged during activities that require short bursts of power, such as sprinting or lifting heavy weights, which aligns with their ability to contract rapidly and powerfully.
Greater muscle force is produced with fast glycolytic (FG) contractions; but less O2 and energy is utilized. FG fibers use anaerobic metabolism to produce powerful, high-tension contractions but fatigue quickly.