It may be cold and dark outside, but you don't have to log all your miles inside on a treadmill. As long as you can get away from your desk (or other commitments) during the day, a one-hour lunch break is all you need to improve your running. If you give yourself five minutes to change clothes and 15 minutes to clean up afterward, you've got 40 minutes to work out. "It's dark when I leave for work and dark when I get home," says Tim Johnson, a marathoner and lab-safety officer in Minneapolis. "My lunch-Shoes & Gear

Forty minutes is plenty for most runners to log a respectable distance, even at an easy pace. Still, the most efficient use of your lunch break is to focus on quality workouts-such as speed sessions, hills, and tempo runs. These harder efforts will improve your pace, stride, and running economy, and get you primed for spring racing season (See "Quick Work"). "Two easy short runs can maintain a weekend warrior," says Justin Peschka, a running, cycling, and triathlon coach with Carmichael Training Systems in Tucson. "But two short and intense efforts per week will make you faster."

Midday is actually ideal for quality workouts, as your muscles are more warmed up than in the mornings and you're not as tired as you may be heading into evening runs, says Susan Paul, a running coach with the Track Shack, in Orlando. "If you're used to running in the mornings or evenings, lunch-break workouts might take some getting used to," she says. "But once you adjust, they're very effective."

GO, ALREADY

For hard-charging workers and time-pressed parents, the biggest challenge of the midday run isn't the running itself, it's breaking away for it. If you find yourself working through your workout, you may need to set an alarm on your computer for 11:30 a.m.-or even earlier, to remind yourself to have a light snack so you have energy for your run. Invite coworkers who run to come along, says Katie Blackett, the 2007 National Marathon winner and chief executive officer of the Colorado Mountain Club, who often runs at lunch. Meeting up with someone will force you to get out, which may be worth it even if that means adjusting your workout plans. Blackett and a coworker started a weekly "team building" run at her last job, with five to 10 people going out for easy runs of three to six miles. "It was fun, not fast," says Blackett, who lives in Boulder. "It was a chance to talk to people you normally didn't interact with, and people from all different departments came out."

Though Johnson had a scheduled noon break from his lab duties, he didn't feel completely comfortable leaving to run at first. "I was worried my coworkers and manager would think I was doing less work," he says. He casually let them know that he was heading out for a run, and over time, they started asking about what marathons he was working toward. "People don't get interested in the training," he says. "But they all recognize the marathon and its significance."

And if you think your lunchtime run will wipe you out for the rest of the day, rest assured. The opposite is true: A quick shot of exercise can prevent a late-day slide into lethargy. Your metabolism stays elevated for up to four hours after a run, especially after intense workouts like intervals. A 2005 study in Medicine & Science in Sport & Exercise showed that workers' moods, productivity, work quality, and ability to meet deadlines improved dramatically on days when they exercised. "You relieve stress, reduce muscle tension that builds up from sitting at a desk, and increase the oxygen in your blood," says Kara Mohr, an exercise physiologist based in Louisville, Kentucky. "You'll return to your desk with a better mood and a sharper mind." And you'll be ready to do some fast work.


Run Better

Want the biggest brain boost? Run hard. Studies show that intense bouts of exercise improve learning 20% faster than easy running or rest does.


Nutrition - Weight Loss

No shower at work? As long as you have these essential items and access to a sink, you can freshen up well enough to make it through the rest of the day. Just don't sit too close to your boss.

Baby wipes
Baby powder
Deodorant
Hand towel
Liquid soap
Comb



Quick Work

These quality 20-minute workouts are perfect when you're pressed for time. Spend 10 minutes warming up and cooling down.


Tempo Run

WORKOUT: 20 minutes of running at a comfortably hard pace, about a half-marathon pace or slightly faster
VARIATIONS: Every 4 to 6 weeks, pick up the pace by 4 to 6 seconds per mile.
BENEFITS: Trains the body to process lactic acid more efficiently, and prepares you mentally to sustain a hard race pace


Hill Repeats

WORKOUT: Run for 1 minute uphill, rest for 30 seconds at the top, run down the hill, and rest for 2 minutes at the bottom. Repeat 4 times.
VARIATIONS: Try to go farther in 1 minute, or try to get up the hill faster. In inclement weather, run up stairwells.
BENEFITS: Health & Injuries


Speedwork

WORKOUT: Run for 30 seconds at mile race pace, then recover with 30 seconds of jogging. Build up to 20 minutes.
VARIATIONS: Build to 2 minutes of race-pace running, and reach a total of 20 minutes of fast running.
BENEFITS: K Treadmill Training Plan to Help You PR


Headshot of Matt Allyn
Matt Allyn
Features Director

Matt Allyn is the features director for Bicycling and Runner's World magazines. He's run nine marathons and come heartbreakingly close to BQing three times. In addition to running and cycling, he's also covered beer for more than a decade and is a certified beer judge.