running intervals 17:26 [5] 3.87 km (4:30 / km)
shoes: Brooks Launch 5
bleh. tried for 3x1600m alternating 100m at 25s/20s. first one was brutally difficult and ran a 6:30, second one had gut discomfort, stopped 1k in, continued, still slow in 6:40. mostly tired out because you expect the slower pace to feel like a rest but it's 100% not. felt lightheaded and dizzy after 2 so cut the third one and only did 4x100m strides.