Table 1

Workload classifications and boundaries for: (A) acute workloads, (B) chronic workloads, (C) acute:chronic workload ratios overall, and (D) acute:chronic workload ratios combined with low (<16 095 m), and high (>16 095 m) chronic workloads

(A) Acute workloadz-ScoreCurrent and Subsequent week (m)Two-week average (m)
Very-low≤−2.00≤3268≤5020
Low−1.99 to −1.003269–96245021–10 351
Moderate-low−0.99 to −0.019625–16 00010 352–15 668
Moderate-high0.00 to 0.9916 001–22 36415 669–20 966
High1.00 to 1.9922 365–28 79720 967–26 265
Very-high≥2.00≥28 798≥26 266
(B) Chronic workload
Very-low≤−2.00≤6955≤6675
Low−1.99 to −1.006956–11 3436676–11 074
Moderate-low−0.99 to −0.0111 343–15 72911 075 –15 526
Moderate-high0.00 to 0.9915 730–20 11615 527 –19 995
High1.00 to 1.9920 117–24 50319 996 –24 449
Very-high≥2.00≥24 504≥24 450
(C) Acute:chronic workload ratioCurrent and Subsequent weekTwo-week average
Very-low≤−2.00≤0.30≤0.45
Low−1.99 to −1.000.31–0.660.46–0.74
Moderate-low−0.99 to −0.010.67–1.020.75–1.01
Moderate0.00 to 0.991.03–1.381.02–1.30
Moderate-high1.00 to 1.991.39–1.741.31–1.58
High2.00 to 2.991.75–2.101.59–1.87
Very-high≥3.00≥2.11≥1.88
(D) Acute:chronic workload ratioCombined with low chronic workloadCombined with high chronic workload
Very-low≤−2.00≤0.30≤0.66
Low−1.99 to −1.000.31–0.660.67–0.84
Moderate-low−0.99 to −0.010.67–1.020.85–1.01
Moderate0.00 to 0.991.03–1.371.02–1.18
Moderate-high1.00 to 1.991.38–1.741.19–1.35
High2.00 to 2.991.75–2.161.36–1.53
Very-high≥3.00≥2.17≥1.54