YOU SAID:
the fitnessgram pacer test is a multistage aerobic capacity test that gets progressively more difficult as it continues
INTO JAPANESE
fitnessgram ペース メーカー テストがそれにつれて徐々 に困難を取得する多段有酸素能力テストです。
BACK INTO ENGLISH
It is a multistage aerobic oxygen test fitnessgram pace maker test as it gradually gets harder.
That didn't even make that much sense in English.
