Stevie Brown hooked himself up to a harness and stepped onto a balky treadmill with rubber panels on the track. The contraption was rigged to make the 6-foot, 220-pound safety feel like he was almost 300 pounds. Unlike most treadmills, this one would only move if he applied force. A gauge measured how quickly the Giants safety could burst in miles per hour. With teammate David Caldwell looking on at TEST Sports in Martinsville on Friday, Brown began to push. The hum of the track grew louder the faster he went. After a five-second burst — designed to mimic the length of an average NFL play — the meter read 14.1. As in, the safety with almost 80 extra pounds on his back was running 14.1 miles per hour — a record for the day. Constantly reminded of how fleeting success can be in the NFL, Brown, soaked in sweat and panting on the artificial turf after the treadmill torture, has not stopped working to keep his place as a starter secure. "I look at it as my spot," Brown said of the safety position. "It’s my spot to keep." After making 11 starts last year as an emergency fill-in, Brown now understands both sides of the NFL. He knows what it’s like to be promised a roster spot only to be cut a day later like he was in Oakland. He also knows what it’s like to pick off eight passes in limited duty, setting a franchise record for interception return yards as he did last year. With a taste of the good life came a one-year tender worth $2.023 million, and a drive this offseason to turn it into something more. He knows there are plenty of other safeties — Will Hill, Ryan Mundy, Alonzo Tweedy — looking to take his place. "I look at it as capitalizing on an opportunity," Brown said. "I always knew I had it in me, it just all finally came out when I was able to get on the field and start making plays. It was just everything coming together at the right time." Following meetings with the coaching staff during minicamp and OTA’s, Brown realized that he needed to improve on his body control this offseason.