Have fitness questions? Fitz has your answer. Our ThatsFit.com fitness expert -- and now your own virtual personal trainer -- will help you get fit, increase your overall health and do it in a fun way. Drop your questions here in the Comments section below and we'll choose two per week to publish on That's Fit! Learn more about Fitz here.

Q. Dear Fitz, I want to take one of the BOSU classes at my gym, but I've never done it before and I'll feel like a total dork if I bust my butt on one of those things. Plus I'm a guy. Mostly girls take those classes. Should I bother? Eric.

A. Ahhh! Eric, you are too cute. First of all. The BOSU is a balance tool and is designed to make people wobbly. Until that is, they earn the strength and control to not only stand on top of it, but do some tricks too. Second. You can stand in the back of the classroom if you don't want to be a spectacle. Third. Most people in a BOSU class are too concerned with their own balance to have the time and ability to look at what anyone else is doing.

Fourth. For some reason, men in group fitness classes are usually accepted warmly. Everyone usually loves the 'class guy'. Maybe it's because there are only a few. Fifth. The BOSU isn't actually very high off the ground, so even if you do lose your balance....you can probably just step down off of it and start over. Get to work Eric! There's a BOSU our there with our name on it. Fitz

BOSU Balance Trainer. Power-Systems.Com(click thumbnails to view gallery)

Q. Hey Fitzy, I'm dying for a butt like Beyonce's. Mine is flat. What do I do? Yasmin.

A. From flat to PHAT like Beyonce's? Not happening sweetie! Beyonce is "bootylicious" because of her genes, and there is not an exercise in the world that can help you fill out her jeans. Having said that! I can advise you on ways to lift and develop the gluteal muscles. I too, am lacking in the tushy. It's a teeny little thing, but I do a bunch of great training to keep it high and roundish.

Try some or all of these exercises to work your glutes, hamstrings and abductors. Those muscle groups will enhance the shape of your booty.

• Squats
• Hack squats
• Lunges ( Forward, side and reverse)
• Donkey Kicks
• Side Kicks
• Rock Climbing
• Uphill walking or jogging
• Squat-jumps
• The Bridge
• Rollerblading
• Ice Skating
• One-legged squat
• Wall squat
• Hamstring curl
• Quadruped Hip Extensions
• One-legged dead lifts
• Stair climbing
• Elliptical set on incline
• Stadium walking/jogging

Punches & Kicks,