Strength training also has positive benefits on bone maintenance and stability that eclipse the potential benefits of aerobic weight-bearing exercise.

FORBES: Why Strength Training May Help You Live Longer

We're sweating out stress at the gym, too, which also hits the V-spot: Aerobic exercise and yoga enhance vagus nerve output -- as does meditation.

CNN: What really makes people happy

You can break up your workout into three 10-minute sessions of aerobic exercise and get the same benefit as one 30-minute session.

CNN: updated

These recommendations include at least 60 minutes of moderate-intensity aerobic exercise a day, such as brisk walking, plus high intensity activity three times a week.

WSJ: Kids With Asthma Play Hard, Too

The 2008 Physical Activity Guidelines for Americans released by the Department of Health and Human Services recommends that adults age 18 to 64 engage in at least 2.5 hours of moderate-intensity aerobic exercise (brisk walking, biking) or an hour and 15 minutes of vigorous activity (like running) each week.

CNN: Is a shorter but harder workout better?

Three of the camps I saw had outdoor soccer fields, and various camps also had foosball, table-tennis, and aerobic exercise equipment.

CENTERFORSECURITYPOLICY: Trusting terrorists, abandoning troops

People in this group were also the only ones who showed a significant increase in their maximum oxygen consumption (which measures the capacity for aerobic exercise) compared to the non-exercising control group.

CNN: Weights plus walking equals more fit in less time

This should include vigorous (jogging) and moderate aerobic exercise (a brisk walk), as well as twice-weekly activities, such as weight training, which maintain or increase muscular strength and endurance.

BBC: NEWS | Health | Exercise 'must be tough to work'

"Aerobic exercise is two to three times as effective as any known brain-training activity, " says Sam Wang, Ph.

CNN: Helpful ways to boost your memory