Chris Freytag is a professional trainer who is associated with Prevention magazine. I asked Chris the following questions:

Tobi: What kind of exercises/crunches will target the lower abs? Mid-abs?

Chris: Basically all ab muscles are working with ab exercises. Our "lower abs" is the transverse Abdominus which wraps around you like a belt. You can always use this muscle with ab exercises. Always pull your belly button to your spine, imagine zipping a pair of jeans that are too tight and pull in that muscle. The full body roll up really targets the whole core and is probably one of the best overall ab exercises!

Tobi: What can I do to prevent the sugar low that happens between 4 p.m. and 5 p.m. each day? It's profound, although less so though when I eat fruit or something.

Chris: Try a complex carb like whole grain toast or whole grain cereal. Or, maybe some carrot sticks dipped in a tablespoon of peanut butte, or a handful of almonds and an apple. By adding a little healthy fat you'll stay satisfied longer.

Tobi: What's good for tightening and toning the gluteus maximus? (The derriere)

Chris: The best overall bun tightening exercises are squats and lunges. They work if you are consistent! Also the leg extension when on all fours on the floor, extending the leg behind you. Add a resistance band and you'll really feel it!

Thanks Chris! It's good to have a second opinion. There are also tons of great exercises for the abs and ass, along with healthy snack ideas, right here on AOL Diet & Fitness.