他每天早上都锻炼腹肌。

He exercises his abdominal muscle every morning.

你可以通过仰卧起坐来锻炼腹肌。

You can strengthen your abdominal muscle by doing sit-ups.

她每天做瑜伽来保持腹肌的紧实。

She does yoga every day to keep her abdominal muscle firm.

他的腹肌受伤了，需要休息几天。

His abdominal muscle is injured and needs a few days of rest.

她的腹肌非常强壮。

Her abdominal muscle is very strong.

腹肌：腹腔前壁及侧壁的肌肉。

Abdominal muscle: Any of the muscles of the front and side walls of the abdominal cavity.

腹肌: 腹腔前壁及侧壁的肌肉.

ABdominal muscle : Any of the muscles of the front and side walls of the abdominal cavity.

腹肌强直（板状腹，板样强直）

Rigor of abdominal muscle (wooden belly, board-like rigidity)

脚尖放平，腹肌放松，上身立起。

Tip of toe setting plane, abdominal muscle relaxing, upper body standing.

是啊，歌手用腹肌和胸膛来呼吸。

Yeah, singers breathe with their abdominal muscles and their chests.