Strong Legs = Better Core

It's often the most under worked area in most gyms you go too. There are plenty of bicep curls, and bench presses, to go around, but if you know what you are doing, you are working your legs. Squats, lunges, burpees, leg presses, they are all tough moves, but if done correctly and focused, can produce great core results and overall fat loss. Crunches are good for the 6 pack look, but if you have some fat to shift, these wont get you very far at all. Instead follow this leg routine at least twice a week and see how you get on. 

1. Barbell Squat 
2. Dumbell Lunges
3. One leg hamstring curls
4. One Leg toe taps

Do 3 sets of 10 each. 

Make sure your weight is heavy enough so that find it hard enough on reps, 8, 9 & 10.