Skip to content
My WebMD Sign In, Sign Up

Fitness & Exercise

Font Size

Everything You Ever Wanted to Know About Exercise


Q: How often do I need to buy new workout shoes?
The general rule is every 500 miles, but sneakers tend to last longer if you're using them on cardio and weight machines versus pounding the pavement with regular outdoor runs.

Q: How many calories should I expend each day to lose weight?
A: To lose 1 pound a week you need to expend an additional 500 calories a day, either through exercise or cutting calories from your diet. Don't try to lose more than 2 pounds a week — people who lose weight quickly tend to regain it quickly.

Q: If I have only 30 minutes, what's the best way to utilize that time to burn the most calories and fat?
A: Work out at the high end of your target heart rate zone doing anything that gets you up to that level, whether it's doing one cardiovascular activity or a combination of activities.


Related content on



Healthy Living Tools

Ditch Those Inches

Set goals, tally calorie intake, track workouts and more, all via WebMD’s free Food & Fitness Planner.

Get Started

Today on WebMD

pilates instructor
15 moves that get results.
woman stretching before exercise
How and when to do it.
couple working out
Moves you can do at home.
woman exercising
Strengthen your core with these moves.
man exercising
7 most effective exercises
Man looking at watch before workout
Overweight man sitting on park bench

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.


Now check your email account on your mobile phone to download your new app.

pilates instructor
jogger running among flowering plants
woman walking
Taylor Lautner