全力

1. Origins, structure, and basic meaning

• Structure: 全力 is read as ぜんりょく and is a noun meaning all available strength or effort, used in both examples as the adverbial phrase 全力で.
• Basic usage: It emphasizes physical effort in a race and wholehearted commitment when supporting a friend.

2. Common pitfalls and similar expressions

• 全力で
  • With で, it describes how an action is carried out, modifying 走り抜く or 支える.
• Kind of effort
  • Running involves speed and stamina, while support involves effort and commitment, so the phrase is not limited to physical force.