You'll be counting down the time (quite literally) in this next leg exercise, as you implement various lunges in one sequence. To slay this leg workout:

Step 1: Stand with your feet and legs together.

Step 2: Step your right foot forward (12 o'clock) and lower into a front lunge. Come back up bringing your feet together.

Step 3: Immediately step your right foot sideways (3 o'clock) and lower into a full squat. Come back up bringing feet together.

Step 4: Immediately step your right foot back (6 o'clock) and lower into a reverse lunge. Come back up bringing feet together.

Step 5: Repeat 12 o'clock (front lunge), 3 o'clock (side squat), and 6 o'clock (reverse lunge) four times on each leg.

Why does the name alone strike fear into my quads?

Step 1: Stand with your feet and legs together, about 1-2 feet in front of a step or bench.

Step 2: Extend your right leg back and place the toe on the step. Keep your hands down by your sides.

Step 3: Bend both knees, going into a one-legged lunge. Come back up and, straighten both legs, with your back toe still on the step. Be sure to keep your left heel firmly rooted into the floor.

Step 4: Complete eight full split squats.

Step 5: After completing the eight split squats, incorporate eight pulses by performing the same move, just at a faster pace.

Step 6: Repeat eight full split squats, and eight pulses three times on each leg.

Who doesn't love bouncing around? This next leg workout requires some one-legged jumping, but be sure to keep the standing knee slightly soft the entire time, not locked or hyperextended. Mathews also recommends bringing the jumping heel down while performing each of the jumps.

Step 1: Stand with your feet and legs together. Raise one knee and balance on the other leg.

Step 2: Without touching your raised leg to the ground, jump forward and backwards ten times.

Step 3: Now jump right to left ten times (your lifted leg still not touching ground).

Step 4: Jump straight up and down ten times.

Step 5: Complete ten calf raises on the standing leg (the opposite still raised). To do so, go up onto your tip toes and then back down to a flat foot. Feel free to use a chair or wall for balance.

Step 6: Repeat entire sequence three times on each leg.

Don't let the "seated" name fool you. This leg workout will still have your pretty legs burning by the end. To sculpt your stems via straddle circles:

Step 1: Sit on the floor with your legs extended forward and wide apart.

Step 2: Place both hands close in front of you, fingertips touching the floor (for an advanced move, keep palms firmly planted on the floor). Keep your right leg straight with toes pointed as you raise the leg straight up off the floor.

Step 3: Perform 10 small circles with your toes clockwise and counter clockwise. Repeat the 10 small circles with the other leg.

Step 4: For those who want it more advanced, try to perform the circles with both legs extended up off the floor.

Step 5: Complete three sets for each leg (or together).

This last move will give the quads a serious burn and might induce some tipping over for the not-so-stable. If you tend to struggle with balance, feel free to use the back of a chair for stability.

Step 1: Stand with your feet and legs together. Extend your right leg straight back with your toes touching the floor for balance.

Step 2: With a slight bend in your left leg, slowly bend forward at the hips (pushing hips back as far as possible), and hold for three seconds. Your toes should still be lightly touching the floor.

Step 3: Push up through your heel to come back up to the start position.

Step 4: Repeat this ten times on each leg.

Step 5: From there, go straight into single leg squats. Start with your right leg back and go into a Romanian deadlift, and hold.

Step 6: Start to bend both your knees, and send your hips even farther back until your right knee is gently touching the floor. This should put you into a reverse lunge. Hold for three seconds, and then come back up to the starting position. Repeat ten times on each leg.

And there you have it. The six best leg exercises for getting toned legs (and a serious a burn). Pizza anyone?