Seated crunch machine The seated crunch machine takes the basic ... Continue for 5 to 10 minutes, increasing your time as your endurance improves. 7. GHD Machine Sit Ups Used one way, the GHD (or ...

If you’re a little hazy on the difference between sit-ups vs. crunches, you’re not alone. They both strengthen your core, but the details on how they differ and the benefits of each can be confusing. ...

Two popular abdominal exercises include sit-ups and crunches. While the two are frequently referenced interchangeably, the moves are performed in different ways, and they target different muscles.

Much like the v-sit crunch, begin lying on the floor however with your arms straight above your head and legs hovering just above the floor. Tense your abs and pull yourself up to the v-sit position.