Work your Core of the Floor

[simona]

Work your Core off the Floor! USe the revolutionary plank exerciser to strengthen your abs and your upper core. Plank 360 works on the principle of Isometric training, Isometric training is based on the theory that you can most effectively train your muscles (www . plank360 . com ) by exerting about 60-70% of your maximum strength and holding still for about ten seconds.

[jas]

Alright show us

[HedonisticFrog]

Isometric exercises aren't going to give you a strong core over the range of motion you use for boxing. You have to work against resistance over the range of motion you use for the movement to best develop strength for that movement. This guy just looks like spam anyways.