Strain (one's) back
Translation of "strain (one's) back" into Russian
strain (one's) back
потянуть (свою) спину
He strained his back while lifting the heavy box.
Он потянул спину, поднимая тяжёлую коробку.
Definitions
To injure or overexert the muscles or ligaments in the back, often resulting in pain or discomfort.