Acute and Post-Exercise Physiological Responses to High-Intensity Interval Training in Endurance and Sprint Athletes

Table 2. Exercise test characteristics.

	HIIT long intervals	HIIT short intervals	Constant Load
Work intensity (% θ½V̇O_2max)	100	100	50
Work duration (s)	180	30	1260
Recovery intensity	passive	passive	---
Recovery duration (s)	180	30	---
Work-to-relief ratio	1:1	1:1	---
P_mean (% P_max)	50	50	50
Repetitions	4	21	1
HIIT duration (min)	21	20.5	---
Total duration (min)	32	31.5	32

Ï…V̇O_2max - minimal running speed required to elicit V̇O_2max, P - power.