how can muscles be big but not strong, like body builders vs rock climbers?

Question

how can muscles be big but not strong, like body builders vs rock climbers?

In: Biology

Answer 1

Fast-twitch (Type II) fibers: These fibers contract quickly and are used for rapid, powerful movements. They fatigue more quickly than slow-twitch fibers and rely primarily on anaerobic metabolism (without oxygen) for energy production.

Slow-twitch (Type I) fibers: These fibers contract more slowly and are resistant to fatigue. They are well-suited for endurance activities such as long-distance running or cycling. Slow-twitch fibers rely primarily on aerobic metabolism (with oxygen) for energy production, which allows them to sustain activity for extended periods.