| 1 | As you can see from this photo, planking can build strong abs. | |
| 2 | The "six-pack abs" bags above are a prime example. | |
| 3 | Concentrate on using your stomach muscles to hold yourself straight and remember to breathe. | |
| 4 | Push-ups work the chest, shoulders, abs and triceps while sit-ups predominantly work the abdominal muscles. | |
| 5 | With guys, if you don't have a six-pack, then you're an ugly loser. |