Happy man // Happy man - Frank van Delft|Getty Images(Frank van Delft|Getty Images)

The average American man works 8.73 hours per day. If you feel like you need 87 hours in a day just to meet all of your deadlines, then you have a bigger problem than drowning under your inbox: You're setting yourself up for heart disease, finds a new study published online today in The Lancet.

The study looked at workers under "job strain." That's just a fancy way of saying that you 1) have piles of work to do, and 2) feel like you have zero control over your workload, your promotion chances, or the brain-numbing assignments your boss slaps on your desk.

The findings: Men who experience job strain have a 29 percent greater chance of developing heart disease than men without these demands. Even guys who had very high workloads were in the clear as long as they felt like they had some control over their fate.

Strain leads to stress, which increases your blood pressure--the number one risk for heart disease--and could lead to a long list of other heart-damaging side effects, researchers explain.

Are you strained? Answer these two questions:

Do you feel constantly overloaded at work? Do you feel like there's jack you can do about it? If yes to both--congratulations!--you have job strain.

But even if you can't control your workload, you can beat the heart-damaging effects of stress. Step 1: Sweat. A lot. A University of Missouri at Columbia study found that 33 minutes of high-intensity exercise helps lower stress levels more than working out at a moderate pace. What's more, the benefits last as long as 90 minutes afterward. For a fast-paced, muscle-building, fat-torching workout that's like nothing you've ever seen before, check out Speed Shred from Men's Health DeltaFIT. The eight follow-along DVDs will change your life, one 30-minute workout at a time.

Steps 2 through 15: These easy tips to turn your workplace into a palace of zen.

Take Your Calls Standing Up

Here's what happens when you flick on your iMac: "Your breathing rate goes up 30 percent, your blinking rate goes way down, and you tend to tighten your arms and shoulders without knowing it," says Erik Peper, Ph.D., of the Institute for Holistic Healing at San Francisco State University. Your remedy: Change your body position every half hour or so--simply standing while talking on the phone can improve bloodflow and ease muscle strain. (Is your office chair killing you? Find out in the Men's Health special report Sentenced to the Chair.)

Visit Cracked.com

Each hour, spend a minute perusing a funny blog. Periodic breaks help you process and absorb new information, increasing your efficiency, says Cleveland Clinic psychologist Michael McKee, Ph.D. During your hiatus, take 10-second breaths--inhale 4 seconds, exhale 6--to bolster your heart's ability to recover from stress.

Enforce the Three-Second Rule

The average working professional spends roughly 23 percent of his workday on email and glances at his inbox about 36 times an hour, finds a study from the University of Glasgow. It takes you an average of 64 seconds to return to a task once you've stopped to read a new email, according to another study from Loughborough University. Allow yourself no more than 3 seconds to decide whether a message is worthy of your immediate attention, says John Grohol, Psy.D. (Here's an email you'll look forward to receiving every day: The Men's Health Daily Dose newsletter. It's full of tons of useful stuff!)

Put a Green Dot on Your Phone

This is your secret reminder to take one deep breath before you answer a call, says Susan Siegel, of the Program on Integrative Medicine at the University of North Carolina school of medicine. Not only will you feel better, but you'll sound more confident.

Go to Starbucks--with Your Coworkers

Researchers at the University of Bristol in England discovered that when stressed-out men consumed caffeine by themselves, they remained nervous and jittery. But when anxious men caffeine-loaded as part of a group, their feelings of stress subsided. Just make sure you avoid The 6 Worst Coffee Drinks in America.