The third path is a true test of better body strength, only for the most experienced.

第三条路是对有着更好的身体力量的人的真正考验，只适合最有经验的人。

youdao

youdao

They feel I need to bulk up, and to improve my upper body strength.

他们觉得我需要变粗壮些，并增强上身的力量。

《柯林斯英汉双解大词典》

His body grew strong as the forest tested his strength and let him brave.

VOA: special.2010.06.26

Two cornerstones of the Islanders' workout are the bench press for the upper body and squats for lower-body strength.

WSJ: What's Your Workout? A Skater's Edge

Needless to say, he won every face-off, though his success seems due as much to technique as to upper body strength.

WSJ: Urban Gardner: Lacrosse, the Sport of Scholarships

Many disabled people do not have the body strength to twist, pull, lift or balance objects the way able-bodied people do.

BBC: Disabled at risk at home