Training variables and symptom incidence by sex, performance level, training phase and season during 7016 person-weeks for 37 elite cross-country skiers
| Factor | Endurance | Daily training volume (h:min) | Daily TRIMP | All symptomatic events (% of weeks) | RTI events (% of weeks) | GII events (% of weeks) | Weeks (% of factor) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| I-zone 1 (%) | I-zone 2 (%) | I-zone 3 (%) | I-zone 4 (%) | I-zone 5 (%) | Str/Pw (%) | Sprint (%) | |||||||
| Total | 79 | 3 | 4 | 3 | 2 | 8 | 2 | 02:20±01:19 | 192±114 | 6.6 | 5.8 | 0.8 | 7016 (100) |
| Sex | |||||||||||||
| Male | 78 | 4 | 4 | 3 | 2 | 7 | 1 | 02:11±01:20 | 181±116 | 7.4 | 6.6 | 0.8 | 3402 (48) |
| Female | 79 | 3 | 3 | 3 | 2 | 8 | 2 | 02:28±01:18 | 203±111 | 5.9 | 5.2 | 0.7 | 3614 (52) |
| Performance level | |||||||||||||
| IL | 78 | 4 | 4 | 3 | 2 | 7 | 2 | 02:14±01:20 | 187±115 | 7.4 | 6.7 | 0.7 | 3298 (47) |
| WL | 80 | 3 | 3 | 3 | 2 | 7 | 2 | 02:24±01:19 | 197±112 | 5.9 | 5.1 | 0.8 | 3718 (53) |
| Phase | |||||||||||||
| Transition | 76 | 5 | 4 | 2 | 1 | 11 | 1 | 02:15±01:16 | 183±108 | 7.3 | 6.5 | 0.8 | 629 (9) |
| General prep. | 78 | 4 | 4 | 3 | 1 | 8 | 2 | 02:42±01:24 | 221±116 | 5.3 | 4.9 | 0.4 | 3150 (45) |
| Specific prep. | 81 | 2 | 3 | 3 | 3 | 7 | 1 | 02:16±01:08 | 186±96 | 6.7 | 5.6 | 1.1 | 1252 (18) |
| Competition | 81 | 2 | 3 | 4 | 4 | 5 | 1 | 01:53±01:03 | 162±108 | 8.6 | 7.5 | 1.1 | 1673 (24) |
| Regeneration | 76 | 5 | 3 | 4 | 3 | 9 | 0 | 01:10±01:07 | 102±116 | 7.7 | 6.7 | 1.0 | 312 (4) |
| Season | |||||||||||||
| Spring | 77 | 4 | 4 | 3 | 3 | 8 | 1 | 01:50±01:14 | 155±118 | 8.0 | 7.3 | 0.6 | 1404 (20) |
| Summer | 79 | 4 | 4 | 2 | 1 | 8 | 2 | 02:44±01:26 | 222±117 | 4.1 | 3.8 | 0.4 | 1887 (27) |
| Autumn | 79 | 3 | 4 | 3 | 1 | 8 | 2 | 02:34±01:18 | 210±109 | 6.5 | 5.6 | 0.9 | 1901 (27) |
| Winter | 81 | 2 | 3 | 3 | 4 | 6 | 2 | 01:06±01:07 | 171±99 | 8.3 | 7.1 | 1.2 | 1824 (26) |
For endurance training in each of the five intensity zones, strength/power (Str/Pw) and sprint training values are percentages of total training volume. Daily training volume and daily training impulse (TRIMP) are presented as mean±SD.
GII, gastrointestinal infection; IL, international-level athletes; I-zone, intensity zone; RTI, respiratory tract infection; WL, world-leading athletes (minimum one individual senior Olympic/World Championship medal).