Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Young people frequently say that they want to exercise, but they just can't find the time. The solution just might be in-office interval training. Recent studies show that very short but intense exercise rapidly builds and maintains fitness and health, even when the workout is only a few minutes long. Work the stairs You can complete an excellent, effective -- and very brief -- workout in an office stairwell, says Martin Gibala, a professor of kinesiology at McMaster University in Canada and an expert on interval training. For a study that he and his colleagues presented earlier this year, they asked 12 out-of-shape women in their 20s to warm up for two minutes by slowly walking up and down stairs in a campus office building. They completed three of these abbreviated stair workouts per week for six weeks. By the end, their aerobic fitness had improved substantially, the researchers reported, by about as much as if they had been running or cycling each week for hours. Fidget your way to fitness. Parents and teachers may once have urged you to sit still, but wiggling, tapping your toes, standing briefly, and otherwise fidgeting as much as possible at your desk is in fact good for your body. In one recent study, college students showed healthier blood flow in their lower legs if they fidgeted than if they did not. Even better, a 2008 study found that among office workers, those who frequently fidgeted burned as many as 300 calories more each day than those who resolutely stayed still.
How many studies are shown in the passage?

Sam Gillen (Van Damme) is a convict who gets sprung from Federal custody somewhere in the Midwest by his bank-robbing partner. In their last heist, Sam's partner killed a bank guard, and Sam took the rap for it. Sam's partner gets killed in the break, forcing Sam to go it alone in search of the loot, which is buried on the property of a farm inhabited by Clydie Anderson (Arquette), the widowed mother of two kids named Mike "Mookie" Anderson and Bree Anderson.Attempting to sneak into Clydie's house and "borrow" some salt for a campfire-broiled steak, Sam catches sight of Clydie taking a shower. The next morning, Sam is spotted bathing outdoors by Mookie. After saving Clydie, Mookie, and Bree from a trio of intruding thugs, Sam discovers that Clydie is holding out from selling her place to property developer Franklin Hale, who fears that he will be put out of business if he doesn't get Clydie's land so he can develop on it.Sam decides to hang around, sleeping first in Clydie's barn and then in her bed while repairing her late husband's Triumph motorcycle. And Hale hires an intimidation expert named Dunston, to force Clydie into selling her land. Secretly on Hale's payroll is corrupt sheriff Lonnie Cole, a sometime lover of Clydie.A jealous Lonnie discovers Sam's true identity and threatens to expose him if he doesn't leave. Not wanting to place Clydie in additional danger for helping a fugitive, Sam decides to leave, only to find that Hale has already blown the whistle on him in an attempt to get him out of the way. After evading police chasing him in cars, land rovers, helicopters, and on motorcycles and horseback, Sam returns to save Clydie from Dunston and Hale, who are planning to burn down her house.After fighting off the bad guys and getting Hale caught holding a gun to Clydie's head, he decides to turn himself in, rather than run away. He promises to be back to live with them.
Who spots Sam bathing outdoors ?

As the movie opens, we see a guy climbing along the underside of an outcropping from a tall mountain peak. He turns out to be Gabe Walker, a ranger with Rocky Mountain Rescue. (Yes, that makes him "Ranger Walker," and he is addressed as such several times during the course of the movie.) He is in communication with his co-worker and girlfriend, Jessie, who is on a chopper piloted by an older co-worker, Frank. The three are mounting a rescue of yet another co-worker, Hal Tucker, and his girlfriend Sarah, who is on her first climb. Hal and Sarah made it to the top of the mountain, but Hal has aggravated an old knee injury and can't make it back down.Gabe makes it to the top of the peak where Hal and Sarah are. The chopper drops Gabe a cable, which he secures, while the chopper lands on a nearby peak. All is set for the three to shuttle across the cable to where the chopper is. There is a lot of light-hearted banter as this is a routine operation that they all (except Sarah) do all the time. Hal goes first, and as he is crossing, Gabe asks Sarah how Hal persuaded her to accompany him on this escapade. She replies laconically, "He told me it's better than sex."Hal makes it across and now it's Sarah's turn. She is a little frightened at the thought of hanging from a cable 4,000 feet above the ground, but the fact that Hal crossed without incident is reassuring. Halfway across her equipment fails and suddenly she is hanging by a strap and unable to reach and grab onto the cable. Gabe quickly crosses to her and grabs her arm just as the strap breaks free. But they are unable to keep their grip on each other, and Sarah falls 4,000 feet to her death. This is by far the most dramatic and gripping scene in the movie and some viewers will be haunted by it for weeks afterwards. But really, except for providing some background for the interpersonal dynamics among the remaining characters, it has nothing to do with the plot of the rest of the movie.Fast forward eight months, and we pick up two different plot lines that will converge later. At the U.S. Treasury office in Denver, Treasury Agent Travers is preparing to leave on a flight with several large containers of printed currency totaling $100,000,000. His boss introduces FBI Agent Matheson, who is being transferred and is bumming a ride on the flight. Gabe, meanwhile, drives up to Jessie's (and formerly his) house. He had left after Sarah's funeral because he felt he had to get away, and has been working in Denver. He wants Jessie to come to Denver with him, but she won't. She leaves for work, leaving Gabe to get his stuff from the house and load it into his vehicle.On the plane, Matheson looks out his window and sees another plane flying next to them. He quickly and correctly sizes up the situation, informs the other two Treasury agents that Travers intends to hijack the plane, and pulls his gun on Travers. The other two agents dutifully pull their guns on Matheson, as does Travers. Travers shoots the other two agents, then shoots Matheson. In the cockpit, the co-pilot comments about the gunfire, and the pilot shoots him. The two planes move into position and run a cable between them. Travers transfers over, then the pilot sends the containers.But Matheson isn't dead. He manages to shoot the pilot, shoot the cable in enough places that it detaches from both planes and the containers fall to the ground, and shoot the other plane enough times that it crashes in the mountains, before his own plane explodes from explosives previously set by Travers. Kristel, the pilot of the other plane, radios for help, reaches Jessie, Hal, and Frank, tells them they are hikers who got lost in a snowstorm, and asks them to send a chopper. But they can't send a chopper because of the storm, so Hal sets off to

Who's death does Hal remain bitter towards Gabe for?