How Much Exercise Do You Really Need?

Experts are good about giving us exercise advice. The Department of health regularly updates physical activity guidelines telling us just how much exercise we need to improve our health, lose weight and more.

The President's Council on Physical Fitness and Sports has chimed in with its own guidelines. Even personal trainers, like me, offer the basics of how to exercise and you'll notice that most of these guidelines look about the same: Cardio about 3-5 days a week and strength training about 2 times a week.

These guidelines are helpful, but often vague, leaving you wondering: How much exercise do I really need to lose weight?

What many of us want when we go on a search for exercise advice is specifics. We want to know what activities to do and for how long, how hard to work and how to do the exercises.

We want someone to say, "Here's the workout schedule you need to get exactly where you want to go." While plenty of experts will tell you they have the answer, the truth is, no one schedule will fit your exact needs.

So how do you figure out how much exercise you need? One place to start is with your goals. To help you out, I've broken down the guidelines for the three most common goals: better health, preventing weight gain and, of course, weight loss. The sample workouts and schedules included will help you make exercise a reality.

The Physical Activity Guidelines for Americans, published by the Department of Health recommend:

• Do moderately intense cardio 30 minutes a day, five days a week or do vigorously intense cardio 20 minutes a day, 3 days a week.
• Also do 8 to 10 strength-training exercises, 8 to 12 repetitions of each exercise twice a week.

The following examples show how you can schedule your workouts to meet the guidelines:

This workout schedule is a good choice if you're a beginner and aren't quite ready for 5 days of cardio:

• Monday: 20 min cardio
• Tuesday: Total Body Strength
• Wednesday: 20 min cardio
• Thursday: Rest
• Friday: 20 min cardio
• Saturday: Total Body Strength

This series takes things a bit further with more workouts and more intensity:

• Monday: 30 min elliptical, medium pace
• Tuesday: 20 min interval training (alternate walking and jogging, or this Beginner Interval Workout)
• Wednesday: Total Body Strength
• Thursday: 20 min intervals (alternate walking and jogging, or Beginner Interval Workout)
• Friday: Total Body Strength
• Saturday: Three 10-minute walks at a brisk pace

While there aren't official guidelines for preventing weight gain, the ACSM's position stance on the subject suggests moderate-intensity workouts between 150-250 minutes (20-35 minutes daily) or about 1200 to 2000 kcal a week may help you maintain your weight.

To see what this looks like in real life, check out the sample schedule below, which predicts calories burned for a 150-lb person:

This exercise program includes a variety of cardio activities, all done at a moderate pace along with a strength workout and a yoga workout, for a complete and balanced program:

• Monday: Elliptical Trainer, 40 min at a moderate pace, 327 calories, 10-minute stretching, 40 calories
• Tuesday: Basic Total Body, 30 min, 100 calories
• Wednesday: Walking, 45 min at 4.5 mph, 322 calories, 10-minute stretching, 40 calories
• Thursday: Basic Total Body, 30 min, 100 calories
• Friday: Swimming laps, 20 min, 137 calories
• Saturday: Yoga class, 60 min, 170 calories

Total Time: 245 Minutes
Estimated Calories Burned: 1236

Now we get to the nitty-gritty, the amount of exercise you need to lose weight. You can see that it takes quite a bit of exercise just to prevent weight gain, and it takes, even more, to actually lose weight.

Keep in mind, though, that working harder for some workouts will give you more bang for your buck. To see it in action, the sample routine below shows how a 150-lb exerciser fits in 300 minutes of exercise a week:

• Monday: 30 min High-Intensity Interval Training (HIIT) - Alternate 1 minute running (10 mph or as fast as you can) with 2 minutes of walking (4.5 mph) for 30 min, calories 320. Basic Total Body, 30 min, 100 calories
• Tuesday: 60 min kickboxing class, 550 calories
• Wednesday: 30-45 min Lower Body Strength, 300 calories, 15-minute stretching, 42 calories
• Thursday: 60 min yoga class, 170 calories
• Friday: 45 min HIIT - Alternate 1 minute 10 mph with 2 minutes at 4.5 mph for 45 minutes, calories 480
• Saturday: 30 min Upper Body Workout 150 calories

Total Time: 315 Minutes
Estimated Calories Burned: 2112

If you're a beginner trying to lose weight, you may be put off by the amount of exercise you have to do. The good news is, you don't have to start at that level. In fact, a great way to approach it is to start with a focus on improving your health.

Those workouts are perfect for beginners and allow you to build a strong foundation of strength before you move up to the more strenuous routines required for maintaining and losing weight. Start with what you can handle and use the guidelines as just that: Guidance to set up a program that works for you.