10 gear-free ways to exercise while traveling

Nothing puts a damper on travel quite like a bum back or screaming sciatica.

Sitting for long stretches in a car or on a plane, lifting luggage, and slumbering in different beds - not to mention diving into new adventures - can spell trouble for even the most dependable spine.

"Travelers will be well-served by exercising," says physical therapist Robert Gillanders. "On vacation, you may not be able to do exactly what you do at home, but mixing up your routine is good - and often invigorating."

It's easy to pack running shoes or goggles and a swimsuit for a vacation workout. When I have space in the car, I bring my bike, but even when I arrive sans wheels, most cities now have bike-share programs that make it a cinch to get moving. If I'm traveling light, I toss a resistance band and jump rope in my bag.

One way to get your heart pumping on a road trip is to knock out one push-up or jumping jack for every dollar of gas when you fill up.

I recently asked Gillanders, a marathon runner and spokesman for the American Physical Therapy Association, to recommend some simple, gear-free ways to stay fit during travel.

When you begin looking at your travel destination as a big playground, you'll find countless spots to move your body: curbs for calf raises, jungle gyms for pullups, boardwalks for lunges and walls for - what else? - wall sits.

In this work out, Gillanders recommends performing each exercise for 15 to 60 seconds, depending on your fitness level, and cycling through the entire set. If you're feeling good, try it twice or thrice.

Remember to engage your core, breathe and focus on your form. "I would rather see five good reps," Gillanders quipped after watching my (conceivably sloppy) push-ups, "than 15 slacker reps."

1. Warm up. Get your joints loose, muscles moving and heart pumping by skipping with an imaginary jump rope, stepping up on a park bench or running bleacher stairs. You can even march in place for a few minutes.

2. Squat or lunge. For good squat form, try standing about six inches in front of a chair or bench, and lower your hips until your bottom taps the seat. Look forward, and counterbalance the squat with arms extended to the front. A lunge is essentially a half-squat. Gillanders recommends stepping back, which makes it easier to keep your torso upright. Swing forward the arm opposite your front leg. Avoid undue strain by keeping both knees at about 90 degrees.

3. Channel the bird dog. If you've been treated for back pain, you've probably seen this exercise. Begin on your hands and knees, then lift and extend one arm (thumb up, palm in) and opposite leg (only as high as your hip). Your middle shouldn't move; imagine trying not to spill a drink on your lower back. Pause before alternating.

4. Push it up. For a proper push-up, place your hands on the ground, about shoulder-width apart, fingers facing forward. Position your elbows at roughly 4 and 8 o'clock. Lower your body so upper arms are parallel to the ground. Common mistakes are letting your hips rise or lower back sag. You can start from a knee position and progress to regular push-ups. For superstar status, work toward decline push-ups with your feet on a bench.

5. Take on the deceptively difficult plank. From the push-up position, lower your upper body so your forearms are flat on the ground, parallel to each other. Keep your core tight, and for extra challenge, alternate lifting each foot up a few inches, or try a side plank.

6. Rock the dead bug. This exercise is great for your core and minimally stressful for your spine. Lying flat on the floor, raise your arms straight up, fingertips pointing to the ceiling. Lift your legs so your hips and knees are both at 90 degrees. With a tight middle, slowly lower one leg and the opposite arm toward the floor, without arching or flattening your back.

7. Go for a dip. Tone the back of your arms with tricep dips, which you can do off a park bench or even a step. Sit with your palms on the edge of the bench, beside your legs. Scooch your bottom forward until it's off the seat, with your knees at about 90 degrees. Slowly drop your hips a couple inches until upper arms are parallel to the ground (bending your elbows more can strain your shoulders). Return to the starting position. The farther out you move your legs, the greater challenge for your arms.

8. Practice your balancing act. Stand on one leg and engage your core, quad and glute. If you're wobbly, stand in a doorway for support. Once you can stand like a flamingo for 30 seconds without losing balance, progress to swinging your leg forward and back, like a pendulum, then left and right in front of you. Advanced: Turn your head side to side and up and down, close your eyes, or stand on a folded towel.

9. Cool it. Gillanders recommends dedicated stretching time after your workout, when muscles are warmed up. "People don't like the idea of stretching," Gillanders said, "but think about your non-vacation habits (hunch over a computer screen, anyone?) and areas where you're prone to tightness, such as your hamstring, back and hip flexor."

10. Finally, remember mental fitness. Stop. Listen to waves crashing or birds chirping. Sit and breathe deeply. "Most folks think of exercise as go-go-go," Gillanders said. "The practice of mindfulness and meditation demonstrates the upside of slowing down." He suggests travelers ditch their devices and scrap their schedules. "Staying fit doesn't have to be moving," he said. "It can be going into a field and meditating."