Diagonal

She felt a sharp pain in her diagonal abdominal muscle while doing sit-ups.

The yoga instructor demonstrated a pose that targeted the diagonal muscles in the abdomen.

The conductor directed the orchestra to play the crescendo in a diagonal pattern, starting from the woodwinds and moving to the brass section.

The racing car sped across the track, leaving behind a trail of diagonal tire marks.

The physical therapist recommended exercises to strengthen the diagonal muscles in the patient's back.

The pianist played a complex piece with rapid diagonal hand movements.

The chessboard is arranged in alternating light and dark diagonal squares.