Josh Lancaster | Built to Thrive on Instagram: "Built to Thrive Interval Session SAVE this one for your next track day. Perfect when trying to hit a 5 or 10km PR. Or Hyrox! When put into a well structured program, of course. Warm-up: 10 minutes at Zone 2 with 2x 30 second fast efforts Workout: 6x 400m efforts @ 7 RPE Rest = to work time. 2-3 minute walk or light jog rest into… 8x 50m efforts @ 8 RPE Rest as needed to ensure quality is high. Cool down: 5-10 minutes Zone 1/2 Tasty."