
If you're used to running outside, and the colder weather has forced you to exercise inside, working out on an indoor
track is a great option. Many gyms and health clubs have them, and one reason they're a pleasure to run on is that their surface is spongy, so it's easier on your joints. It's the closest you can get to actually running outside because you're using your own muscle power to propel yourself forward, unlike running on a
treadmill.
DrSugar is in the house and answering your questions.
Dear DrSugar,
Sometimes after a rigorous cardio workout (one hour, doing intervals for the first half hour and steady pace for the second half), I come home and start feeling queasy and weak, then need to lie down. Sometimes I feel this way for an hour or more postworkout, well after I've showered and eaten.

This week belongs to Britney Spears: between her
Circus album dropping (can we say new workout songs?) and her
standing-ovation-worthy performances, we seem to be witnessing the pop star's long-awaited comeback. Britney worked hard getting back into
world-tour shape, and she admitted to
Glamour magazine that she thinks going to the gym "isn’t fun . .
Push-ups are one the world's best exercises because you don't need to do many in order for them to be effective. They work your upper body and core like nobody's business. If you're looking for a way to make your push-ups more challenging, try using a resistance band.

During the holiday season we are all pressed for time, but stress can turn you into a "bah humbugging" Scrooge. One thing that is guaranteed to help is exercise.
It is true that
moderate exercise can improve your mood.

If you're looking to strengthen your core muscles as well as your shoulders and arms, here's a great move called the
suitcase walk. Not only is it great for toning your muscles, but it can also prepare you for carrying your suitcase in the airport this holiday season. Here's how to do it:
- Hold a rather heavy size dumbbell in your right hand, between 15 and 30 pounds.

Celebrity trainer
Harley Pasternak who's trained
Alicia Keys,
Eva Mendes, and
Halle Berry has a little tip for us when it comes to strength training. He recommends a one sided workout like this: "Work with only one arm or one leg at a time when strength training with dumbbells. This way, while you're resting one side of your body you'll keep the other side going strong."

If you're looking for a unique way to increase flexibility in your spine, then you'll want to try Locust. The full pose is rather Cirque du Soleil-ish, with both feet extended in the air. It's extremely challenging since it requires both flexibility in the back and upper body strength, so let's ease into Locust with a relaxing prep pose.

Very inexpensive, relatively easy, and extremely effective, jump roping is one of the best pieces of fitness equipment to have on hand. It takes up no room in your
travel bag, and because it gets your heart rate up in no time, it's great for those times when you can only squeeze in a quick workout.
Men's Health shares my love for the jump rope and counted the ways in which it's awesome, although the magazine didn't include one of my favorite parts of jumping rope — it's so much fun!

Even though we all know that the
average Thanksgiving dinner is 3,000 calories, it is hard not to overindulge.
Gold's Gym wants to help you get back on track after your holiday feast. The chain has even renamed Black Friday "
Trim the Fat Friday" and is offering free workouts to the public.