David Kirsch

If there's one thing that we need to avoid, all of us - young, old - it's processed, refined sugar. There's nothing good about it.

You need to stick to a workout that fits into your lifestyle, targets your body issues, but also correlates to your objectives, whether you're at home, on vacation, in the office, or on the road.

The point of workouts are no longer to do double 60-minute sessions or go to classes five times a week. You don't want to burn out and beat your body up.

As you get older, you really need to be much more dialed in to the things you eat.

If you take care of your body, it will take care of you.

Being pregnant is not license to forget all the rules that you abide by when you're not pregnant. Moving your body, getting enough sleep, staying hydrated, and eating proper foods throughout the day are even more important when you're pregnant.

If you do the treadmill or elliptical all the time, try adding the rowing machine or stair climber, maybe get a new bicycle. You want to keep it fresh.

I have both my daughters on gluten-free diets, and you can see the difference. They are only four years old, and it definitely changes their mood. You can see that for sure.

Lunch is the meal where you put carbs in, such as lentils and beans.

Dinner should be low in caloric intake. Foods like fish and broccoli are very good choices.

We live in a society where healthy choices aren't usually the most popular choices.

People tend to lean on cardio machine handles, and their posture begins to suffer.

A boot-camp class that combines upper- and lower-body moves - like walking lunges and push-ups - gets the heart rate up quickly, burning fat and calories and toning muscles in a time-efficient way.

I like quick and efficient circuit training.

Women often use weights that are too heavy. I like to stay in the 3- to 15-pound range. If you're more fitness-experienced, use weights in the 8- to 10-pound range. If you're a beginner, start in the 3-pound range.

The Swiss Ball Pike is a total-body exercise that is especially great for your core, arms, and lower back.

As parents, we have a responsibility to teach our family and our children everything they need to know about good health and eating and movement, and just an everyday healthy life.

It's true of models in general - I don't think they eat and fuel properly throughout the day.

Jumping rope is better than running because it engages the whole body.

When training intelligently, 'one size doesn't fit all.' There are exercises and weights appropriate for some body types, ages, and overall objectives and not for others.