|longchamp le pliage 投稿者：longchamp le pliage 投稿日：2016/07/25(Mon) 13:15:16 No.6874773 [返信] |
When High Altitude/Hypoxic Training Makes Sense<br><br>While the stand-alone altitude masks that operate by restricting breathing don’t improve endurance performance, there are some ways that hypoxic training can be useful.<br>Pacing and Perception Training<br><br>CTS Athlete Rebecca Rusch (3x World Champion, 4x Leadville 100 Champion, 3x Dirty Kanza 200 Champion) is preparing for an expedition to hike up and mountain bike down Kilimanjaro (see video below). She recently spent 3 days walking on a treadmill wearing a 40lb weight vest in the HATC, not to improve her fitness, but to determine the best pacing strategy for carrying 40lbs of gear up to 19,000 feet above sea level. When she went too fast, like accelerating from 2.2 to 2.5mph on a 10% grade at 13,000 feet, her oxygen saturation would plummet and her heart rate would spike. This was coupled with perceptions of tingly fingers and pressure behind her eyes. Together, the speed, heart rate and perception data gives her more knowledge about how to gauge her efforts. Similarly, athletes preparing for Leadville or other high-altitude events benefit from training at altitude to gain an understanding of how hard they can go and how their power and sustainable pace will be affected. Even exposure to altitude, including during short visits, can help acclimatization somewhat. With short visits you don’t have time to increase red blood cell mass, but you may stimulate ventilatory changes, which can help. This is part of the reason mountaineers go up to higher base camps and come back down when they are on their way to extremely high summits.