"My foremost concerns when starting something are injuries and physical well being."
- "My foremost concerns when starting something are injuries and physical well being."
"my foremost concerns" 「私の最も心配することは」"my biggest concerns" も使えます。
"when starting something" 「何か始める時に」
"injuries" 「怪我」
"physical well being" 「健康面」"health" も使えますが "physical well being" の方が適切と思います。