Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.

[EX Q]: Paragraph: HIIT can blast calories, build muscle and boost endurance with impressive efficiency in just 20 minutes a day, but the catch is finding the right level of intensity outside the comfort zone, fitness trainers say. Sean Bartram, author of the book “High Intensity Interval Training for Women,” said to find that level people should think about what it is like being chased by a rabid dog. “It’s just below that,” he said. “To gain maximum benefits you have to push your body to a place that’s almost uncomfortable.”   The American College of Sports Medicine predicts HIIT will be a top fitness trend in 2015. Bartram said people are drawn to it for its efficiency and almost endless variety of exercises. The bursts can be sprinting or spot jumps and the recovery can be rests or slower paced movements, he explained. “You could alternate 30 seconds of sprinting with 30 seconds of walking, or you could engage in a series of bodyweight exercises, such as push-ups, doing each for 30 seconds with 10 seconds of rest in between,” he said. Dr. Michele Olson, a professor of exercise science at Auburn University at Montgomery, Alabama, said it’s not high intensity unless the heart rate is elevated to near 90-plus percentage of its maximum. “Many people think they are engaging in HIIT but they are really doing traditional interval training, where the heart rate is around 75 to 85 percent of max,” she said. Maximum heart rate is about 220 minus age, according to the American Heart Association. Olson said that if done properly, HIIT can increase the effectiveness in losing abdominal fat and prompt favorable changes in cholesterol and insulin levels. “There is research showing that you can cut your exercise time nearly in half,” she said. About 20 minutes of HIIT can reap similar benefits of doing 35 to 40 minutes of moderate, steady-state cardio, she added, noting the training level must be intense. Hayley Zawadzki, personal training manager at New York Health and Racquet Club fitness centers, suggests that anyone starting HIIT should have a fitness analysis. “If you have a history of high blood pressure or medications, you cannot push to the absolute max,” she said. Claim: Key to High Intensity Interval Training found outside comfort zone.
[EX A]: With High Intensity Interval Training (HIIT), which consists of short bursts of intensive activity followed by short periods of  recovery, fitness experts say the harder the push, the greater the reward.

[EX Q]: Paragraph: A significant drop in immunisation over the last few years has made Samoa highly vulnerable to outbreaks of the disease, with the World Health Organisation (WHO) saying vaccine coverage is just about 31% there. Schools have been shut and a mass vaccination effort launched in the nation of just 200,000 located south of the equator halfway between Hawaii and New Zealand, with its government saying 50,068 people have been vaccinated. The health ministry said 3,149 cases of measles have been reported, with 213 during the last 24 hours. Of 197 victims in hospital, 20 are critically ill children and three are pregnant women, it added. Deaths in the outbreak have now reached 42, the majority of them children under the age of four, the government said. Neighbouring New Zealand said it was sending more supplies and personnel, including emergency medical assistance teams, nurse vaccinators, intensive care specialists and Samoan-speaking medical professionals. “The Samoan health system is under serious strain with growing numbers of people, many of whom are very young, needing complex care as a result of the measles outbreak,” said New Zealand’s foreign minister, Winston Peters. New Zealand would also fund 100,000 more vaccines for measles and rubella, Peters added in a statement. Britain said a group of British doctors and nurses left on Friday to help Samoa’s efforts to rein in the outbreak, while Australia said it had also sent medical personnel and supplies. Measles is caused by a highly contagious virus that spreads easily through coughing and sneezing. Other nations in the Pacific, such as Tonga and Fiji, are also grappling with a spike in the number of measles cases. Tonga has said its outbreak followed the return of a squad of its rugby players from New Zealand, where Auckland, the biggest city, is tackling a growing number of cases. Measles cases are rising worldwide, even in wealthy nations such as Germany and the United States, as parents shun immunisation for philosophical or religious reasons, or fears, debunked by doctors, that such vaccines could cause autism. Claim: Samoa measles toll hits 42 as nations dispatch medical teams, supplies.
[EX A]: More nations were flying medical staff and supplies to Samoa on Friday to battle a measles outbreak that prompted the Pacific island nation to declare a state of emergency this month, as the death toll rose to 42, most of them children younger than four.

[EX Q]: Paragraph: "The story deal with cost very early in the story: ""You have one kind of operation that could cost $20,000 and another that could cost $80,000 and there’s not good evidence the expensive one is being used appropriately in the majority of cases""… Add to that the expense for patients whose problems after surgery send them back to the hospital or to a nursing home and ""that’s not a trivial amount of money"" for Medicare… The cost to Medicare, just for the hospital charges for the three types of back surgery reviewed is about $1.65 billion a year, according to the researchers. The story clearly stated, ""The study didn’t address how successful the various types of surgeries were at relieving pain."" Good job using absolute risk data: Nice job emphasizing what’s known and what’s not known. Excerpts:" Claim: Study: Riskier surgeries for back pain raise costs
[EX A]:
"Thorough report, including a glance at how marketing and financial conflict of interest may have influenced the rise in costly, complex surgeries. The story ends with an important quote from a spine surgeon:  ""Too much fusion surgery is done in this country and often for inappropriate reasons"" and patients ""should not hesitate to get a second opinion."""