Just like keeping a healthy diet is important to maintaining a healthy lifestyle, eating the right foods is just as important for getting the most out of your workout.

I've gone on workout regimes, but I seem to have a system that is very resistant to changing.

I want to get better each and every day and attack each and every day. Whether that be a pool workout, a sand workout, an on the court workout, I'm just trying to get better in every situation.

Tennis takes care of everything. It requires agility and quickness to get to the ball, core strength to get power into your shorts and stamina to last for an entire match. In addition to toning your arms and shoulders, it's a total body workout for your legs and abs, and works your heart and core unlike any other sport.

I actually gained a lot of weight when I started to do 'Grey's Anatomy.' Doing eight theater shows a week, girl, is such a workout. But with TV, you're, like, sitting in your trailer waiting to go to the set. And there's catering and craft service every place you look.

The best feeling in the world is a hard workout, a shower, and a protein shake.

You've got to get your mind connected to the workout. Pay attention to what your body's doing. It's about connecting mind and the body. Visualize the muscles moving.

Dance is a physical and mental workout. Once you get your body moving, you'll see a difference.

If you eliminate the junk food, you don't really run the risk of gaining weight if you've got a good workout routine.

Rihanna is always on my playlist. I think she pumps you up and gets the day going. I also love - and I know this doesn't sound like a workout album - the Lumineers, lately, and Taylor Swift.

Once you learn the basic rules of good nutrition, you'll realize it's not so complicated. It doesn't matter if you're running errands or 13 miles, you need enough fuel to last all day. Proper nutrition is the difference between feeling exhausted and getting the most out of a workout.

You're clearing your mind during a workout. Boxing is a great sport for girls; it's really safe.

Sometimes less is more when it comes to workout routines.

I never coast through a workout. This is been great for me physically, but it's also become a problem in two ways. One is that no matter how I'm feeling on a given day, I will absolutely kill myself in the gym, and it takes a huge amount of energy do that. I commit 110 percent. The other problem is that finding a workout partner is impossible.

My workout is my meditation.

I need to eat before a workout. If I exercise in the morning, I'll have a little oatmeal, cereal, or a hard-boiled egg with toast. If I go in the afternoon, I'll eat a turkey sandwich with cheese for lunch.

Performing is the craziest workout for me, because I feel like, on the first day of tour, I'm going nuts. Halfway through, I'm just so tired but obviously you keep pushing yourself because you have fans watching you.

I always say fitness is the first step to greatness. And I try to encourage my fans to be on the same page as that. Because fitness is the first step to setting a habit that you necessarily don't want to do but are still committed to doing every single day. And so I think that's why I always, always try to get a workout in.

So many people are insanely busy nowadays, and it's easy to say, 'Ah, I'll workout tomorrow.' But you have to set aside a time and stick to that schedule.

A cardio workout increases blood flow and acts as a filter system. It brings nutrients like oxygen, protein, and iron to the muscles that you've been training and helps them recover faster.