How to do an abdominal crunch + the benefits for runners' strength training armoury. It works the rectus abdominis, the pairs of long, flat muscles at the front of the abdomen which together form that well-known 'six-pack'.
The key function of these muscles are for flexion of the trunk – curling the rib cage and pelvis towards the abdomen – however, they also work with the How to do a side plank (internal obliques, external obliques and transverse abdomens) to support the muscles of the spine.
The abdominals also work in synergy with other core muscles, including muscles in the lower back, glutes, diaphragm and pelvic floor, to help stabilise the torso. And a stable torso is especially important for runners, as it helps keep you upright when you run and prevents side-to-side rotation. This not only makes you run more efficiently but reduces strain on other areas of the body. For example, it will ensure your hips remain level as your foot strikes the ground, and help to keep your knees in proper alignment, reducing the likelihood of lower-limb injuries.
How to do an ab crunch correctly
- other abdominal muscles.
- Place your hands to the side of your head, fingers by your ears.
- Contract your abs and curl forward to lift both shoulders off the floor without tucking your chin to your chest. Hold very briefly, then lower to the start position.
Sets/reps: How to do donkey kicks
