I'm Jeremy Shore for LIVESTRONG.COM, and this is ways to workout on your lunch hour. A quick workout on your lunch break can improve focus and boost your mood. It's important that the workout is efficient, making the most of your time. So, assuming you'd still like to have time to eat, plan for about 20 minutes of activity each day. For a five day routine, on Monday, Wednesday and Friday, focus on total body strength training. And on Tuesday and Thursday, place more emphasis on cardio by walking, jogging or even better, climbing the stairs in your building. If you can find a training partner or even a mid-day class in a nearby gym. This will provide a community and accountability needed to stick to your plan. If you don't have access to a gym, find an open space and try this 20 minute body weight workout. Spend the first five minutes performing a light warm-up, which can include walking, jogging or doing jumping-jacks. Combine that with stretching to counteract the effect of sitting all day, targeting the calves, hip flexors, lats and pecs. Now, try this 15 minute body weight circuit to build total strength and boost your metabolism during your next lunch break. Perform three rounds with 40 seconds of work and 20 seconds of rest between exercises, and one minute of rest between rounds. The first exercise in a circuit, is a mountain climber with a push-up. So, come down onto the floor, onto a mat in plank position with fully extended arms. Bring your hands out, slightly wider than shoulder width. From here, you will perform a mountain climber by bringing your knee in towards the arm in front of it and then, extending it back. Making sure to keep your body long and flat with a straight line, from ear to your ankles. So, perform the mountain climber, then we'll add a push-up right in between. So, it's mountain climber, left, right, push-up. Perform this exercise for 40 seconds, rest for 20 and then, we're going to go right into a Bird Dog. So, come onto all fours, knees below your hips, hands below your shoulders, flat back, from the back of your head, down to your tail. And alternate, extending the opposite arm and opposite leg. Reach, keeping the body nice and flat and alternate sides. Repeat for 40 seconds, rest for 20 and stand up, move into a reverse lunge. Stand tall, feet, hip width apart, chest up, abs in, step back into a lunge, dropping the trail, knee down, till it's just off the floor. Drive through the lead foot, back up, on your feet, alternating sides. Repeat for 40 seconds and rest for 20. And finish this round, the body weight shop. Stand with feet at shoulder width apart, hand over hand, come down to a squat, rotate your trunk. and from there, explosively rotate and pivot the trail leg, as you reach up and across the body. And then, drop back down into that rotation. Repeat for 20 seconds on one side, switch over to the other side for the second half of the 40 second exercise period. Rest for 20 and then, repeat for three total rounds. I'm Jeremy Shore for LIVESTRONG.COM, and this has been ways to workout on your lunch break.