Maffulli N, Testa V, Capasso G
Department of Orthopaedic Surgery, University of Aberdeen Medical School, Scotland.
J Sports Med Phys Fitness. 1993 Dec;33(4):392-9.
Maximal oxygen uptake, anaerobic threshold (AT), isometric strength of the elbow flexor and knee extensor muscles, isometric strength endurance exhaustion time (prolonged contraction at 66% of maximal isometric strength), uphill sprinting exhaustion time were longitudinally studied in eight varsity endurance runners with post-viral fatigue syndrome (PVFS). Prolonged impairment of exercise performance is evident during the course of PVFS. Although maximal oxygen uptake (VO2max) had returned to pre-infection values 13 months after the viral illness (4.160 vs 4.0 L.min-1), AT was still significantly reduced [52 ml.kg-1.min-1, 18.6 km.hr-1, 176 bpm, and 82% of VO2max vs. 49.1 ml.kg-1.min-1 (p < 0.05), 175 bpm (NS), 17.2 km.hr-1 (p < 0.01) and 79% of VO2max (NS)]. Maximal isometric contraction strength of the upper limb remained constant (282 N vs. 274 N), while knee extensor muscles strength decreased significantly (730 N vs. 701 N, p < 0.05). Strength endurance was still significantly reduced by the end of the study (arm average pre-infection: 46.2 sec; end of study: 29.3 sec, p < 0.001; leg average pre-infection: 66.4 sec; end of study: 49.1 sec, p < 0.01). Up hill sprinting time was similarly reduced by the end of the study period (29.3 sec vs. 16.2 sec, p < 0.01). Both aerobic and anaerobic exercise variables are seriously affected by post-viral fatigue syndrome, and one year may not be sufficient to fully recover.
对八名患有病毒感染后疲劳综合征（PVFS）的大学耐力跑运动员进行了纵向研究，测量了他们的最大摄氧量、无氧阈（AT）、肘部屈肌和膝部伸肌的等长力量、等长力量耐力耗尽时间（以最大等长力量的66%进行持续收缩）以及上坡冲刺耗尽时间。在PVFS病程中，运动表现的长期受损是明显的。尽管病毒感染13个月后最大摄氧量（VO2max）已恢复到感染前水平（4.160对4.0升·分钟-1），但无氧阈仍显著降低[52毫升·千克-1·分钟-1，18.6千米·小时-1，176次/分钟，为VO2max的82%，而49.1毫升·千克-1·分钟-1（p<0.05），175次/分钟（无显著差异），17.2千米·小时-1（p<0.01）和VO2max的79%（无显著差异）]。上肢最大等长收缩力量保持不变（282牛对274牛），而膝部伸肌力量显著下降（730牛对701牛，p<0.05）。到研究结束时，力量耐力仍显著降低（感染前手臂平均：46.2秒；研究结束时：29.3秒，p<0.001；感染前腿部平均：66.4秒；研究结束时：49.1秒，p<0.01）。到研究期结束时，上坡冲刺时间也同样减少（29.3秒对16.2秒，p<0.01）。有氧和无氧运动变量均受到病毒感染后疲劳综合征的严重影响，一年时间可能不足以完全恢复。
