Check your time
Walks shouldn't last more than an hour. Calculate your week's total walking time in minutes, then try to increase it by 10 per cent each week. A starting regimen should involve walking at least three times per week, but never exceeding five times a week. Strenuous walking every day denies the body the rest time it needs to repair minor injuries and could lead to more serious ones.

When walking for exercise, it's important to stretch before and after you walk. Follow the stretching techniques shown below and remember to stretch slowly, without bouncing. You only need to stretch far enough to feel your muscles elongating, not until you feel pain. Talk to your podiatrist or visit www.apma.org if you have specific questions about your stretching routine.

Ankle circles
While sitting or lying down, lift your right leg from the hip so that your thigh is about an inch off the ground/chair. Keeping your knee straight, rotate the foot at the ankle joint slowly in a circular motion. Make ten circles with your ankle going clockwise and ten going counter-clockwise. Repeat with your left leg.

Achilles stretch
From the calf stretch position, bend your knee back so your leg straightens, stretching the Achilles tendon. Keep your heel down and hold for 20 seconds. Repeat on the other side.
Wall push (calf stretch)

Lean into a wall with your feet about 3-4 feet away from the wall, bracing yourself with your arms. Bend one knee and point it toward the wall. Keep your back leg straight with your foot flat, your head up and your toes pointed straight ahead. Keeping your back straight, move hips forward until you feel a stretch. Hold for 20 seconds and repeat with the other leg.

Leg curl (quadriceps stretch)
Stand straight up and, if necessary, hold on to a wall for support. Bend your right foot behind you to your buttocks with your right hand. Keep standing up straight and push your knee gently back as far as you can comfortably go, keeping your heel in place. Hold for 20 seconds and repeat with your left foot and hand.

Hip stretch
Stand up and take a step back with your right foot. Bend your left knee and shift your weight back to your right hip. Keep the right leg straight, bend forward more and reach further down your right leg. Hold for 20 seconds. Then repeat on the other side.
Hip flexors, hamstrings and lower back

Bend your right leg forward until your knee is directly over your ankle. Rest your left knee on the ground. Keeping your right leg in place, lower your hips and slide your left leg back slightly, stretching as far as you are comfortable. Hold for 20 seconds and then repeat on the other side.

Side reaches
Reach one arm over your head and to the side. Keep your hips steady and your shoulders straight to the side. Hold for 20 seconds and repeat on the other side.

Triceps
Stretch your arms up over your head. Bend the right arm, pushing the right elbow back and down with your left hand. Hold for 20 seconds. Repeat on the other side.

Arm circles
Lift arms out at your sides and make forward arm circles. Keep your palms facing in and your thumb pointed down. Make 20 forward circles with each arm. Then make backwards arm circles with your palm facing out, thumb pointed up. Make 20 backward circles with each arm.

Head circles
Start with your ear near your right shoulder. Rotate your head around to the front, ending with your ear near the left shoulder. Rotate your head back to the other side. Repeat 5-10 times.