2012年2月10日 星期五

Peaking For Your Best Performance


The famous Finnish distance runner Lasse Viren who won the 5000 and 10000 meters double at the 1976 and 1980 Olympics claims that it was a peaking technique taught to him by the late New Zealand coach Arthur Lydiard that enabled him to win two Olympic Gold's in two Olympic Games.

Viren says, "The question is not why I run this way, but why so many others cannot". This was Viren's way of saying that most elite distance runners lack the confidence to rest up for a week or so before major races.

Why is this tapering necessary? You might think that reducing your training significantly for a week or two before a competition would cause you to lose your hard-earned endurance. Not so, according to Dr. David Costill, former researcher and head of the renown exercise science department at Ball State University, Indiana. Long periods of intense training actually decrease an athlete's performance capacity. Thus by reducing training duration and intensity a week or two before competition muscle tissue damage caused by intense training heals up, and the body's energy reserves replenish. Proteins enter the muscle fibers and repair the micro tears in them.

Several studies find a marked increase in muscular strength with a tapering period, probably caused by a reduction in the shortening velocity of the fast twitch muscle fibers. Translated this means that the "power" muscle fibers contract quicker after rest.

Another research paper shows that runners and swimmers who reduce their training by about 60% for 15-21 days experience no losses in VO2 max (maximal oxygen uptake) or endurance performance. Furthermore, swimmers demonstrate increases in arm strength and power ranging from 17.7% to 24.6%, considered ideal for athletes about to compete in a major championship. Lactate levels are also lower after tapering at any given workload.

Research may be fine in a lab setting, but does this information have any practical benefits? Most interesting is that swimmers following this tapering program improved their times 3.5-3.7%. This equates to a 40-minute 10k runner decreasing his/her time to 38 minutes, 48 seconds-certainly worth the effort.

Another research paper looked at the effects of tapering combined with carbohydrate loading (with a diet of about 60-70% carbohydrates) for four days before an endurance event. Glycogen stores in liver and muscle tissue almost doubled, resulting in significant improvements in marathon performances, up to 15 minutes.

Additionally, the peaking phase gives the athlete a mental rest from hard grinding workouts. Mental preparation and attitude are almost as important as physical training for maximum performance. The fresher the athlete is the more he/she can concentrate on race pace judgment, self-motivation, strategy planning, psychological arousal and relaxation.

What are the expert's guidelines for tapering? It should be longer for longer events. A marathon taper could be 2-3 weeks, a 10k taper somewhere around 7-10 days, and a 1500 meter track race could be 4-7 days.

Aim to reduce your overall mileage to 30% to 50% of previous totals. It's ok to maintain your usual running intensity (speed), although this too should be cut back a few days before the big race to 60% to 70% of maximal heart rate. The occasional faster than race pace burst is ok during a taper, as long as you have complete recovery. Obviously extended and highly anaerobic workouts and racing during the tapering phase are counterproductive.

Are there benefits to recreational joggers (who run around 20 miles per week) tapering before an event? Probably not - a further reduction in training for low mileage would lead to a decline in cardio respiratory fitness.

With these guidelines in mind, let's look at what some of Seattle's top runners do for their tapering in preparation for a marathon. Alyson Deckert, 41, is one of the area's elite marathoners. She's run three Olympc Marathon trials, and qualified for this year's trials too. With a best time of 2:38:01, she has obviously been successful in tapering for a marathon or three.

Her tapering begins three weeks out; she cuts back her mileage by about 25%, from a usual weekly average of 75 miles, to 60 miles. The second week out she cuts back further to 45-50 miles, still including one fast marathon pace tempo run. In her final week she logs 25-30 miles, with only 2-3 days running, and a couple of days off. She might do runs of 8, 10 and 8 miles in this week, but the last day of running is three days before the marathon. During the last week she'll also load up on carbohydrates and make sure she is getting enough fluids such as Gatorade and fruit juice.

Greg Crowther, with a best marathon of 2:22:32 and many other times consistently near that, easily ranks in the Pugets Sound's top five male marathoners. With a Ph.D in physiology, his research background to has guided him with his tapering program. He also starts three weeks out, cutting back to a lighter than normal mileage. His last long run is three weeks before race day--a 20-22 mile run with the first 6 miles at a comfortable pace, followed by 6-8 miles at his planned marathon race pace, then the final 2-4 miles as a cool down.

Two weeks out he'll still do a speed work out, perhaps 2-3 one-mile repeats, thus maintaining some quality training, while continuing with some longer runs, (although still shorter than usual). His final week he'll take a day off running, but still include a shorter interval track session such as 3 x 800 meters repeats, (or 600 meter repeats), plus 2.5-3 miles on the track at marathon pace on another day.

These higher intensity workouts are easy enough for him to recover from, yet keep his neuromuscular system in tune with his anticipated race pace. His short runs in the final week are easy 5 milers, with a short slow jog the day before the marathon.

Uhli Steidl, number one ranked marathoner in Washington State who placed 12th at last year's Boston Marathon in 2:19:54, also does a three week taper. He's had 30 marathons to perfect his peaking process, and has a best time of 2:13: 56.

He cuts his normal weekly mileage from 110-130 miles to 80-90 miles, three weeks out. Two weeks before a big marathon he'll cut back further to 70 miles, then only run 40 miles the final week before the marathon. Four to five days before the marathon he'll do a 3 miles at his anticipated marathon race pace or 10 x 400 meters at marathon race pace.

All three of these elite marathoners follow the general guidelines outlined above. Other factors obviously contribute to the distance runner achieving his or her optimal performance in a marathon or shorter distances. These include such things as how many races the runner has had, leading up to the major event; the athlete should obviously not peak for every competition prior to the championship event; the importance of achieving a fine balance between good health and top level competition; controlling the nervous excitement leading up to the big competition; and adjusting to the time zone and environmental conditions if necessary.

One final aspect of tapering needs to be considered. The results of a well-planned tapering program are that the runner or triathlete will feel like the competition is almost effortless. This could result in a foolhardy early pace, and blow the results of the tapering. Starting at a realistic pace will ensure that the athlete does not find him or herself in an anaerobic state right from the start.

Thus, peaking is designed to achieve a superior biological state where the athlete tapers his/her training for a period of 7-21 days, depending on the distance. The goal is to achieve good health, complete physical readiness, and a strong psychological state for competition, all of which will lead to maximum performance.

Suggested time trial distances:

1 or 2 miles

3 or 5 miles

10K or 10 miles

Choose one distance from each of these three categories. Your time trials should be performed over a 2-week conditioning period, with 2-3 days of recovery jogging between to allow your legs to recover.

These time trials should be done solo, without the aid of a pacer, as you want your post conditioning time trial to be under identical circumstances. Note the weather conditions, temperature, humidity, wind strength and anything else that could impact your times in these trials.

Note your times for each distance in the pre conditioning tests, then again after your build up. You can easily calculate your percentage improvement in each distance. No improvements from your pre to post build up tests? Consider adding another 2-4 weeks to your conditioning build up.




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