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May 28, 2007

Gym Pursuits

Most people go to the gym to look better but exercise can have unintended consequences.

If there is one glaring false assumption made by the fitness industry in its attempts to lure us to the nearest gym, it is that we sign up purely to get fit and healthy. What really drives those who flock to these temples of body worship is vanity.

According to a survey by the British health insurer BCWA, what we see in the mirror is a far greater incentive than the promises of lower blood pressure or reduced cholesterol made in public health campaigns. But what happens when the good intentions backfire? What if one step-up too many leaves you with calf muscles like footballs or non-stop spinning gives you thunder-thighs? For the narcissist's guide to working out, read on.

Muscle imbalances

Possible cause Golf, tennis and other racquet sports involve the predominant use of one side of the body (or one playing arm), which can cause problems. A study at the Union Memorial Hospital in Baltimore in the United States showed that the most common problems include damage to the lower back caused by the repetitive swinging of a club or racquet to one side.

Solution Physiotherapist Sammy Margo suggests using weights to strengthen the non-dominant side. Golf coach Chris Baron says that in golf, as well as other sports, "the spine is the first area of the body that comes under attack from the swinging if your core muscles are weak. The best way to improve this is through Pilates-style exercises."

One leg shorter than the other

Possible cause Always running on the same side of a road. The average road camber is 7 to 9 degrees, which means you are running on a sloping surface so one foot is hitting the ground at a higher level than the other. "Effectively it makes the leg nearest to the side of the road 'longer'," says Martin Haines, a physiotherapist and adviser to Runner's World magazine. "The body naturally compensates for this by trying to shorten the leg to reduce the pressure on your body, in particular on the back and the knee."

The more you pound the tarmac, the worse it becomes. Running in one direction on a beach can have the same adverse effect if you do it for a prolonged period

Solution "Avoid running consistently on a camber by varying your route and terrain as much as possible," Haines says.

Broad back and shoulders

Possible cause Certain activities, such as swimming, rowing and weight training to strengthen the trapezius and rhomboid muscles in the upper back can result in a "triangular" appearance (broad shoulders and a narrow waist), says Robin Gargrave, executive director of YMCA Fitness Industry training. "Some yoga moves - such as those that support the whole body on the arms - also require the bracing of these muscles in an isometric contraction that, over time, could lead to an overdeveloped upper back."

Solution If you are exercising the upper body, try to balance things out with lower body activities, too. With swimming, vary the strokes or hold a kickboard so that for a few lengths you are using only your legs. "Remember that any aspect of fitness is entirely reversible," Gargrave says. "If you don't like what you see, stop the activity that is causing it."

Potbelly

Possible cause "Having very tight back muscles can tilt the pelvis forward too much, giving the impression of an enlarged belly," Gargrave says. "Poor technique in abdominal exercises can also cause a bulging of muscles in that area."

Eating too little can also backfire on your attempts to get into shape. According to personal trainer Kevin Barclay-Webb, whose clients include Annie Lennox and Ivana Trump, cutting calories too drastically increases the production of the stress hormone cortisol and insulin, which controls blood sugar levels.

As a result, "the body responds by storing excess calories in the abdominal region," he says. Mostly the calories are stored as fat, "which is why otherwise very thin people can still have a roly-poly belly".

Solution Gargrave recommends spine-flexing exercises that improve flexibility of the back but says you should first seek the advice of a personal trainer or physiotherapist. Avoid repetitive sit-ups, which can cause muscles to pop up in an unsightly fashion. Instead, join a Pilates class to learn a variety of core-strengthening exercises instead. Eat a well-balanced diet and don't cut out meals.

Rounded shoulders
Possible cause Over-using the pectoral, or chest, muscles. Personal trainer and postural expert Jo Tuffrey says, "The chest muscles are used in a lot of activities, and things like sitting at a computer or driving keep them activated at a low level all day." Add in chest-strengthening exercises at the gym and the pectoral muscles "become tight and short, translating to weak back muscles and rounded shoulders".

Solution Tuffrey advises stretching out the chest muscles on a regular basis. Sit with your feet hip-width apart and elbows tucked into the waist, hands on your knees with palms facing upwards. Breathe in and sit up straight, keeping neck relaxed. Breathe out, gently pulling navel to spine. Breathe in again and, keeping the elbows at the waist, draw your forearms sidewards to open out the chest. Don't let the shoulders rise. Repeat.

"Chest exercises need to be integrated into a whole-body workout including other major muscle groups, especially the abdominals," she says. "Think of working muscles in pairs, doing equal amounts of exercises with opposing muscle groups. If you're working the chest, you should also work the back. If you're working biceps, you should also work triceps, etc."

Big calves

Possible cause Running uses both the gastrocnemius - the big calf muscle at the back - and the soleus, which is the smaller one lower down, with every stride, so most runners have well-developed lower legs. Overusing the step-machine or doing too many calf-raises can also cause the calf muscles to bulge.

"Your muscles are not usually getting bigger," Gargrave says. "They are just better defined because they are more visible when fat disappears."

Solution Stretch the calf muscles regularly to prevent tightness, Margo says. Place your toes against a wall with your heel on the floor so your foot is at a 45-degree angle. Bring your hip closer to the wall, by pushing off the back foot. Uphill running, in particular, builds the gastrocnemius muscle so try to factor in some downhill running.

Bulging thighs

Possible cause Cycling, spinning, squats and lunges predominantly work the hamstrings and quadriceps - muscles that make up the thigh - and can quite quickly lead to a more toned appearance in the legs.

"A lot of people mistake this improvement in muscle tone for an increase in muscle size, thinking it is making their thighs look bigger," Gargrave says. "In fact, with less fat, the legs are actually more streamlined."

Solution Thigh stretches and more cross-training. "Vary your activities if you don't want to develop one muscle group above all others," Gargrave says. "Incorporate some weight or resistance training for the upper body to balance your overall muscle development."

Guardian News & Media

May 16, 2007

Treadmill desk shows path to weight loss

Think work feels like a treadmill now? Try a new desk designed at the Mayo Clinic.

They built what they called a "vertical workstation" - a desk fitted over a standard treadmill. They persuaded 15 obese people to work at this treadmill-desk and measured how many calories they burned.

If an overweight office worker used this vertical workstation all day, every day for a year, he or she could lose up to 30 kg, the researchers report in the British Journal of Sports Medicine.

James Levine and Jennifer Miller measured how many calories their 15 volunteers burned using exhaled breath but did not determine if the volunteers lost weight.

On average, their overweight volunteers burned 100 calories more every hour while walking slowly - 1.6 km per hour - than while sitting in a chair.

"If obese individuals were to replace time spent sitting at the computer with walking computer time by 2 to 3 hours a day, and if other components of energy balance were constant, a weight loss of 20 to 30 kg a year could occur," the researchers wrote.

The researchers said their desk costs approximately $US1600.

"With population body weight, workplace sedentariness and healthcare costs projected to increase, interventions that allow people to work and yet be active could help reverse obesity," they concluded.

Reuters

May 09, 2007

Worldwide Workout

Find a way to simultaneously scrub a frying pan and dig up a vegie patch, and you may have just clocked-up a near-perfect incidental work-out.

Measuring energy: Big C, little C
A kilojoule is a unit of measure of energy. The foods we eat provide energy, which is measured in kilojoules, but can also be measured in terms of the nutritional or "large" Calorie. One Calorie has the same energy value as 4.186 kilojoules (kJ). This should not be confused with the "small" or gram calorie, which is used by scientists to measure the amount of energy required to heat water. There are 1000 (small) calories in one (large) Calorie, which is why it is also sometimes known as a kilocalorie. 4.184 kilojoules = 1 Calorie = 1 kilocalorie = 1000 calories

Life v gym
· To expend the same energy walking as you would on a treadmill, you'll have to slightly more than triple your time strolling. Therefore, a one-hour walk to the office in the morning equals about 20 minutes on the treadmill.

· One hour of master-chef brilliance in the kitchen burns 222 Calories, equalling the energy expenditure of almost 33 minutes of freeweights in the gym, although the muscle activity will not be as localised.

· Cycling on the road gives you the same work-out as on a stationary bike, so take to the bike path. A leisurely pace consumes eight Calories a minute, with added pleasures of sunshine and fresh air. All those hills make it even better.

· Mowing eats up nine Calories per minute - you won't end up looking like Arnold Schwarzenegger, but you will break a light sweat. Half an hour of mowing is equivalent to almost 40 minutes of freeweights, but you won't get the same definition.

· Figures used are for an 80-kilogram person, with variables in mass, environment, intensity, frequency and duration all contributing to different results.

Scrub up
Commercial weight-loss programs routinely trumpet the fat-burning potential of brisk vacuuming or mopping. At ACU, Rice often highlights housework as an early goal for clients combating obesity.

"We try and say, look at cleaning your house as a form of exercise, rather than a chore," she says. Exercise Physiology promises that an 80-kilogram person burns off about five Calories a minute cleaning. Even cooking claims 3.7 Calories.

Dig deep
Although gardening won't quite deliver the same benefits as a prolonged work-out - during which you work at 50 to 70 per cent of your body's capacity - getting grubby demands elbow-grease, especially in drought conditions. You can burn more than six Calories a minute trimming a hedge, and nine pushing a lawn mower.

"Again, they're strength-type exercises," says Selig. But, while a gardening session does count as exercise, the professor warns that it probably won't give you the aerobic work-out you get from a solid session at the gym.

Walk proud
Walking is the most obvious form of incidental exercise - and one of the best. Parking one kilometre from your destination is equivalent to spending 10 minutes on the treadmill, says Selig.

"If you were to do (the equivalent of) this 15 to 30 times per week, you would achieve the national Calorie objective of 2000 Calories of exercise per week. Most people who maintain that kind of activity maintain very good fitness and, in lots of areas, it transfers into health," he says.

Be sure to carry your office goods in a backpack to evenly distribute the weight across your spine, and remember that, contrary to the claims of Nancy Sinatra, boots are not made for walking - choose runners or comfortable, sturdy footwear.

For added effort, try heaving your groceries up the hill. Freeweights burn close to seven Calories a minute, according to McArdle, Katch and Katch, although the effects of gym-style bicep curls differ from the benefits of prolonged lifting.

"One is for strength gain, the other one - the carrying the bags - is more for muscular endurance. Both of them are very important," says Rice.

Play up
"I'm bemused that people would have children and then pay someone to be a personal trainer for their children. And, most of the time, the parents need an awful lot of exercise when you look at them," says Selig.

There's no more logical way to gently ramp up weekend activity than running after your kids. Outdoor play with a four-year-old commonly involves a blend of running, hopping, carrying the four-year-old (that's about 16kg of load-bearing over a sustained duration), and perhaps you're even taking the dog out at the same time.


Sources: Exercise Physiology: Energy, Nutrition and Exercise, Dr Vanessa Rice