| modified sit-ups | There are several classic examples that will not put strain on your lower back: 1) lay on your back with your knees flexed and feet flat on the floor. 2) Raise your head and torso slightly off the floor with your fingers laced behind your head (abdominal crunch). (27 Sep 1997) |
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| si op. sit | <abbreviation> L. Si opus sit, if needed. (05 Mar 2000) |
| quoties opus sit | <abbreviation> As often as necessary. Origin: L. (05 Mar 2000) |