Kujala U M, Heinonen O J, Kvist M, Kärkkäinen O P, Marniemi J, Niittymäki K, Havas E
Paavo Nurmi Centre, Sports Medical Research Unit, Turku, Finland.
Br J Sports Med. 1989 Jun;23(2):105-8. doi: 10.1136/bjsm.23.2.105.
The benefit of glucose polymer ingestion in addition to 2.5 per cent glucose before and during a prolonged orienteering competition was studied. The final time in the competition in the group ingesting 2.5 per cent glucose (group G, n = 10) was 113 min 37 s +/- 8 min 11 s, and in the group which had additionally ingested glucose polymer (group G + GP, n = 8) 107 min 18s +/- 4 min 41 s (NS). One fifth (21 per cent) of the time difference between the two groups was due to difference in orienteering errors. Group G + GP orienteered the last third of the competition faster than group G (p less than 0.05). The time ratio between the last third of the competition and the first third of the competition was lower in group G + GP than in group G (p less than 0.05). After the competition, there was statistically insignificant tendency to higher serum glucose and lower serum free fatty acid concentrations in group G + GP, and serum insulin concentration was higher in group G + GP than in group G (p less than 0.05). Three subjects reported that they exhausted during the competition. These same three subjects had the lowest serum glucose concentrations after the competition (2.9 mmol.1(-1), 2.9 mmol.1(-1), 3.5 mmol.1(-1] and all of them were from group G. It is concluded that glucose polymer syrup ingestion is beneficial for prolonged psychophysical performance.
研究了在长时间定向越野比赛前和比赛期间除摄入2.5%葡萄糖外还摄入葡萄糖聚合物的益处。摄入2.5%葡萄糖的组（G组，n = 10）比赛的最终用时为113分37秒±8分11秒，而额外摄入葡萄糖聚合物的组（G + GP组，n = 8）为107分18秒±4分41秒（无显著差异）。两组之间时间差异的五分之一（21%）归因于定向越野失误的差异。G + GP组在比赛的最后三分之一赛程中的定向速度比G组快（p < 0.05）。G + GP组比赛最后三分之一赛程与前三分之一赛程的时间比低于G组（p < 0.05）。比赛后，G + GP组血清葡萄糖浓度有升高、血清游离脂肪酸浓度有降低的趋势，但无统计学意义，且G + GP组血清胰岛素浓度高于G组（p < 0.05）。三名受试者报告他们在比赛期间感到疲惫。这三名受试者在比赛后的血清葡萄糖浓度最低（2.9 mmol·L⁻¹、2.9 mmol·L⁻¹、3.5 mmol·L⁻¹），且他们均来自G组。得出的结论是，摄入葡萄糖聚合物糖浆有利于长时间的身心表现。
