What excersizes are most effective for a flat stomach within a week or two? ( be specific and include times of the day, steps taken, diet, etc.)

HIP DIP PLANK

Start in plank; tuck right knee into chest. Rotate waist so that outer side of right hip and thigh are facing ground. Lower body until you are sitting on right hip (A). Lift body back up to plank, then raise and extend right leg (B). Return to start. Do 30 to 40 reps; repeat on other side.

DIAGONAL PIKE LEGS

Lie faceup with legs together and extended straight out. Rotate hips slightly to left so that legs are on a left diagonal. Place left hand lightly on back of head and extend right arm straight out to side, palm facedown (A). Crunch up and lift legs, keeping legs on the diagonal (B). Slowly lower back to floor. Do 30 to 40 reps; repeat on other side.

INNER THIGH CRUNCH LIFT

Lie faceup with legs extended in a wide split, toes pointing up and hands resting lightly on back of head (A). Rotate right leg out, dropping toe to face outward, and raise leg (B). Using inner thigh, lower leg and return to start. Do 30 to 40 reps; repeat on other side.

WEIGHTED PIKE

Lie faceup with legs together and extended straight out. Place right hand lightly on back of head and extend left arm straight back overhead, holding a 3-pound weight (A). Bring legs up to 90 degrees; crunch upper and lower body while lifting left arm up and then lowering it forward until it's in line with torso (B). Return to start. Do 30 to 40 reps; repeat on other side. Keep neck neutral so you don't strain it.

those are a few of my favorites, hope this helps (: