Interval training

by | Jul 31, 2014

Interval training can cut exercise hours sharply Intense, brief workouts twice as effective as other regimens, experts say People who complain they have no time to exercise may soon need another excuse.

Some experts say intense exercise sessions could help people squeeze an entire week’s workout into less than an hour. Intense exercise regimens, or interval training, was originally developed for Olympic athletes and thought to be too strenuous for normal people. But in recent years, studies in older people and those with health problems suggest many more people might be able to handle it. If true, that could revolutionize how officials advise people to exercise — and save millions of people hours in the gym every week. It is also a smarter way to exercise, experts say.

“High-intensity interval training is twice as effective as normal exercise,”  “This is like finding a new pill that works twice as well … we should immediately throw out the old way of exercising.” Intense interval training means working very hard for a few minutes, with rest periods in between sets. It has been tested people running or biking, but other sports like rowing or swimming should also work.

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Expert recommends people try four sessions lasting four minutes each, with three minutes of recovery time in between. Unless you’re an elite athlete, it shouldn’t be an all-out effort. “You should be a little out of breath, but you shouldn’t have the obvious feeling of exhaustion,”  Time could be slashed dramatically if people did interval training instead. Officials have been too afraid of recommending intense training, fearing it might be too much for some people. When compared to people on a normal exercise routine, like jogging, research has shown those doing interval training can double their endurance, improve their oxygen use and strength by more than 10 percent, and their speed by at least 5 percent. Even studies in the elderly and in heart patients found they had better oxygen use and fitness after doing interval training. Still, most studies have been done in young, healthy adults, and experts advise people to consult a doctor before starting any fitness program.

Experts say that’s because intense bursts of activity are precisely what the body needs to build stronger muscles. Traditional workouts lasting an hour or more simply don’t push the body enough.

“A lot of the (benefits) from exercise are due to a stress response,” said  a sports sciences expert . “If you disturb your muscles, there’s an imbalance created and your body will start signaling pathways that result in adjustments.”

He said intense bursts of exercise help the body to convert one type of muscle fiber into another type that uses oxygen more efficiently and is capable of exercising a lot longer. Even though interval training only takes a few minutes, its effects last for hours.

“You’ve exercised at such a high intensity that you’re going to create a massive disturbance in your muscles, That creates a higher metabolism for several hours afterward, which the body will bring down by burning fat and carbohydrates.

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