title: Influence of Load Carriage on High-Intensity Running Performance Estimation.
abstract: Load carriage is a necessary burden for tactical athletes. A combination of training modes, including aerobic conditioning and progressive load carriage, may lead to improved performance. The critical speed (CS) concept enables the practitioner to prescribe high-intensity interval training (HIIT) time limits (TLIMs) from a single 3-minute all-out exercise test (3 MT). We sought to examine the effect of a standard load carriage (18.86 kg) on CS and the finite running capacity > CS (D'). A group of trained subjects (age: 26 ± 5 years, height: 181 ± 4 cm, body mass [BM]: 90 ± 14 kg) completed a loaded and unloaded (UL) 3 MT. The CS was reduced by 0.66 ± 0.24 m·s (p < 0.01) in the loaded condition. There was a small nonsignificant increase in D' (21.25 ± 39.53 m, p = 0.07). The higher the % load carriage relative to BM is, the greater decline in CS (r = 0.83, p < 0.01). A revised CS with load carriage from the UL 3 MT may be calculated using: adjusted CS = original CS + ([-0.0638 × %load]) + 0.6982. Our results indicate that revised CS and TLIMs for fixed distance, fixed time, or fixed speed HIIT prescriptions may be derived from a UL 3 MT. Such calculations would enable more expeditious training for tactical athletes. We recommend further research involving implementation of HIIT using this new method.
authors.affiliation: Viola Holbrook Human Performance Laboratory, Minnesota State University, Mankato, Minnesota.
authors.forename: Aaron A
authors.initials: AA
authors.lastname: Solomonson
authors.forename: Nathan D
authors.initials: ND
authors.lastname: Dicks
authors.forename: Whitney J
authors.initials: WJ
authors.lastname: Kerr
authors.forename: Robert W
authors.initials: RW
authors.lastname: Pettitt
mesh_terms: D000328:Adult; D056352:Athletes; D054874:Athletic Performance / Q000502:physiology*; D005080:Exercise Test / Q000379:methods*; D006801:Humans; D008297:Male; D012044:Regression Analysis; D012420:Running / Q000502:physiology*; D014891:Weight Lifting / Q000502:physiology*