Bird Dogs

Save your spine and help your glutes. On all fours with a core that is completely locked down, extend an arm and opposing leg simultaneously. Lower them to the original position. If you cannot prevent your hips and shoulders from twisting, then I suggest doing Bird Dogs over a bench, as in the included video. Jonathan Fass describes this exercise rather well: "if if seems easy, you're doing it wrong." 

Coach Stevo Top Tip

• Slow and controlled, not fast and hard.
• Your abs should be engaged so hard that you want to cry.